Bridge inspection vehicle ladder device

Abstract

The utility model discloses a bridge inspection vehicle ladder stand device in the technical field of bridge maintenance, including telescopic sliding frame, vertical ladder channel and ladder lock dead device, vertical ladder channel bottom is fixedly connected with bridge inspection vehicle, and the telescopic sliding frame is equipped with the matched sliding component on vertical ladder channel, makes telescopic sliding frame slide -connected on the top of vertical ladder channel along the direction perpendicular to the length of bridge, ladder lock dead device includes the ladder lock dead support and telescopic clamping mechanism of interconnection, ladder lock dead support is connected in vertical ladder channel, and the clamping end of telescopic clamping mechanism is locked with box girder blast nozzle, the device has solved the problem that bridge inspection vehicle meets bridge barrier in the operation process, reduces the personnel safety risk when the inspection vehicle runs simultaneously, improves the use efficiency and stability of inspection vehicle, has the advantages such as avoiding barrier, higher mobility, security.

Description

Technical Field

[0001] This utility model relates to a ladder device for a bridge inspection vehicle, belonging to the field of bridge maintenance technology. Background Technology

[0002] Traditional bridge inspection vehicles typically have ladders that are welded and fixed to the steel box girder, making them unable to move with the vehicle. If a bridge inspection vehicle malfunctions during use and cannot reach the ladder, the personnel inside the vehicle can only be rescued via a fire ladder or a boom-type bridge inspection vehicle, which is both dangerous and costly.

[0003] Bridges spanning navigable waterways often have navigational aids and other ancillary facilities at the vent locations of the steel box girders. The vertical ladder passage integrated with the bridge inspection vehicle cannot pass through these facilities when the inspection vehicle encounters them, significantly reducing the frequency of bridge inspection vehicle use and making it impossible to conduct timely inspections and maintenance of the steel box girders. This also results in a huge waste of social resources. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of existing technologies and provide a bridge inspection vehicle climbing ladder device. This device uses a retractable ladder to safely traverse auxiliary facilities outside the bridge beam, and it moves and stops with the bridge inspection vehicle. In case of special circumstances where the inspection vehicle stops in the middle of the bridge, personnel can safely evacuate the inspection vehicle. Furthermore, when the inspection vehicle is not in operation, it is fixed to the bridge beam by a locking device to maintain the stability of the climbing ladder device. Therefore, this device solves the problem of the inspection vehicle encountering bridge obstacles during operation, while reducing the safety risks to personnel during the operation of the inspection vehicle, and improving the efficiency and stability of the inspection vehicle.

[0005] To achieve the above objectives, this utility model employs the following technical solution: This utility model provides a bridge inspection vehicle climbing ladder device, including a telescopic sliding frame, a vertical climbing ladder channel, and a climbing ladder locking device; The bottom of the vertical ladder passage is fixedly connected to the bridge inspection vehicle; The retractable sliding frame and the vertical ladder passage are equipped with matching sliding components, so that the retractable sliding frame is slidably connected to the vertical ladder passage in a direction perpendicular to the length of the bridge. The ladder locking device includes a ladder locking bracket and a retractable clamping mechanism connected to each other; the ladder locking bracket is connected to the vertical ladder channel, and the clamping end of the retractable clamping mechanism is locked to the box girder air nozzle.

[0006] Furthermore, the retractable sliding frame includes a frame body composed of multiple sets of rods, a sliding work platform is provided at the bottom of the frame body, and a first sliding component is provided on the rods at the bottom of the frame body that can cooperate with the second sliding component of the vertical climbing ladder channel.

[0007] Furthermore, the frame includes a bottom sliding horizontal frame and sliding vertical frames arranged parallel to each other on both sides of the upper part of the sliding horizontal frame. The sliding working platform is fixedly connected to the sliding horizontal frame; the sliding working platform is flush with the top surface of the box girder. When the telescopic sliding frame slides and extends towards the bridge, maintenance personnel can evacuate from the sliding working platform to the bridge deck.

[0008] Furthermore, the sliding horizontal frame is rectangular, consisting of sliding frame horizontal bars and sliding frame vertical bars B connected perpendicularly to each other; the sliding vertical frame is rectangular, consisting of sliding frame vertical bars A and sliding frame vertical bars connected perpendicularly to each other; sliding frame vertical bars A and B are parallel and shorter than sliding frame vertical bars B; the portion of sliding frame vertical bar B that extends beyond sliding frame vertical bar A is also connected to the sliding frame vertical bars by sliding frame diagonal bars.

[0009] Furthermore, the vertical ladder channel includes a working frame and a channel frame composed of multiple sets of rods. One side of the bottom of the working frame is provided with a vertical ladder working platform, a second sliding component that cooperates with the first sliding component of the telescopic sliding frame, and a limiting component. The other side of the bottom of the working frame is provided with a channel outlet. The channel frame is connected to the bottom of the working frame.

[0010] Furthermore, the channel frame includes a support part and a channel part. The support part is located at the bottom of the working frame on one side of the second sliding component, and the channel part is located at the bottom of the working frame on the side of the channel outlet. The channel part is provided with a number of ladder passage steps for workers to climb the ladder.

[0011] Furthermore, the working frame includes a horizontal working frame, a longitudinal working frame that is vertical and perpendicular to each other, and a transverse working frame, wherein the longitudinal working frame is perpendicular to the length direction of the bridge; the passage frame includes a longitudinal climbing ladder frame that is vertical and perpendicular to each other, and a transverse climbing ladder frame, wherein the longitudinal climbing ladder frame is perpendicular to the length direction of the bridge; the climbing ladder passage step rod is disposed on the transverse climbing ladder frame, and the climbing ladder locking bracket of the climbing ladder locking device is connected to the longitudinal climbing ladder frame; the bottom of the passage frame is provided with a climbing ladder passage flange for connection to the bridge inspection vehicle.

[0012] Furthermore, the horizontal working frame is located at the bottom of the working frame and is a rectangular frame composed of ladder passage crossbar A, ladder passage vertical bar A, ladder passage crossbar B, and ladder passage vertical bar C. The vertical working frame is vertically connected above the horizontal working frame and is a rectangular frame formed by ladder passage vertical bar A and ladder passage vertical bar A. The horizontal working frame is vertically connected above the horizontal working frame and is a rectangular frame formed by ladder passage crossbar A and ladder passage vertical bar B. A vertical guardrail surrounding the passage exit is also connected above the horizontal working frame, and several ladder passage crossbars B are provided in the vertical guardrail. A ladder passage patterned plate surrounding the passage exit is also connected inside the horizontal working frame.

[0013] Furthermore, the longitudinal ladder frame is vertically connected to the bottom of the horizontal working frame and is a rectangular frame formed by ladder channel longitudinal rods C and ladder channel vertical rods B. Several ladder channel longitudinal rods C are arranged in parallel, and longitudinal diagonal rods B are provided between adjacent ladder channel longitudinal rods C for reinforcement and protection. The transverse ladder frame is vertically connected to the bottom of the horizontal working frame and is a rectangular frame formed by ladder channel horizontal rods A and ladder channel vertical rods B. Several ladder channel horizontal rods A are arranged in parallel, and transverse diagonal rods are provided between adjacent ladder channel horizontal rods A for reinforcement and protection. Longitudinal diagonal rods A are also provided between the bottom of the horizontal working frame and the longitudinal ladder frames on both sides to support the working frame of the vertical ladder channel. The slide rail is welded to the ladder channel baffle and fixed to the ladder channel track base. The ladder channel baffle is welded to each vertical rod as a safety protection measure for personnel on the vertical ladder channel.

[0014] Furthermore, the first sliding assembly includes a slide rail and a sliding frame lifting ring, and the second sliding assembly includes a slide rail and a ladder channel lifting ring that respectively cooperate with the slide rail and the sliding frame lifting ring; the slide rail slides along the slide rail, and slide rail baffles that limit the slide rail are provided at both ends; when the telescopic sliding frame slides away from the vertical ladder channel, it is connected and fixed to the ladder channel lifting ring through the sliding frame lifting ring.

[0015] Furthermore, the ladder locking bracket includes a locking device inclined rod fixedly connected to the vertical ladder channel at both ends and a clamping plate assembly clamping both sides of the locking device inclined rod. The clamping end of the telescopic clamping mechanism includes jaws for clamping the box girder air nozzle and a telescopic handle for adjusting the opening and closing degree of the jaws. The end of the clamping end away from the box girder air nozzle is connected to the locking handle through a locking drive shaft. The locking drive shaft passes through the ladder locking bracket. The clamping end is also connected to a locking drive secondary shaft that slides through the clamping plate assembly.

[0016] Furthermore, the two ends of the locking device diagonal rod are connected to the upper and lower horizontal rods through the locking device longitudinal rod; The clamping plate assembly includes a locking device transmission shaft clamping plate and a fixed clamping plate, which are fixed to both sides of the locking device inclined rod by transmission clamping plate bolts. One end of the locking device transmission shaft is fixed to the clamping end, and the other end slides through the fixed clamping plate. The clamping surface of the jaws is fixed to the nozzle clamp plate by bolts, and the nozzle clamp plate engages with the nozzle of the box girder.

[0017] Furthermore, the longitudinal rod of the locking device is connected and fixed to the horizontal rod through the locking device flange and the locking device flange sub-plate clamped on both sides of the horizontal rod, as well as the locking fixing bolts.

[0018] Furthermore, all the rods in the retractable sliding frame, the vertical climbing ladder channel, and the climbing ladder locking device are made of aluminum alloy, and each frame that makes up the retractable sliding frame and the vertical climbing ladder channel is assembled by argon arc welding of each rod.

[0019] Compared with the prior art, the beneficial effects achieved by this utility model are as follows: The bridge inspection vehicle climbing device of this utility model solves the problem of the inability of the vertical climbing ladder of the bridge inspection vehicle to cross bridge ancillary facilities through the telescopic sliding frame. This allows staff to extend the telescopic sliding frame and evacuate quickly by climbing over the railings in case of a malfunction during bridge inspection vehicle operation. The climbing ladder locking device securely clamps and locks the climbing ladder device to the box girder, ensuring the stability and safety of the climbing ladder device. Therefore, this device solves the problem of bridge inspection vehicles encountering bridge obstacles during operation, reduces personnel safety risks during vehicle operation, and improves the efficiency and stability of the inspection vehicle. It has the advantages of obstacle avoidance, high mobility, and safety. In this invention, the ladder channel is bolted to the bridge inspection vehicle via a ladder channel flange, making the installation process convenient, quick, safe, and reliable. The entire device is made of aluminum alloy, which reduces the structural weight and makes the structure more stable and safe. Attached Figure Description

[0020] Figure 1 This is an elevation view of the upgraded and modified box girder external inspection vehicle involved in this utility model; Figure 2 This is a front view of a bridge inspection vehicle climbing ladder device provided in an embodiment of this utility model; Figure 3 This is a perspective view of the retractable sliding frame described in an embodiment of this utility model; Figure 4 This is a front view of the retractable sliding frame described in an embodiment of this utility model; Figure 5 This is a left view of the retractable sliding frame described in this embodiment of the utility model; Figure 6 This is a top view of the retractable sliding frame described in this embodiment of the utility model; Figure 7 This is a perspective view of the vertical ladder passage described in an embodiment of this utility model; Figure 8 This is a front view of the vertical ladder passage described in this embodiment of the utility model; Figure 9 This is a left view of the vertical ladder passage described in this embodiment of the utility model; Figure 10 This is a top view of the vertical ladder passage described in this embodiment of the utility model; Figure 11 This is an assembly diagram of the ladder locking device described in an embodiment of the present invention; Figure 12 This is a front view of the ladder locking device described in this embodiment of the utility model; Figure 13 This is a left view of the ladder locking device described in this embodiment of the utility model.

[0021] In the diagram: 1. Box girder; 2. Handrail; 3. Ladder device; 4. Bridge inspection vehicle; 5. Telescopic sliding frame; 6. Vertical ladder working platform; 7. Vertical ladder passage; 8. Ladder locking device; 9. Box girder vent; 10. Sliding frame longitudinal member A; 11. Sliding frame vertical member; 12. Sliding frame horizontal member; 13. Sliding frame longitudinal member B; 14. Sliding frame checkered plate; 15. Sliding frame diagonal member; 16. Slide rail; 17. Sliding frame lifting ring; 18. Ladder passage longitudinal member A; 19. Ladder passage vertical member A; 20. Slide rail track; 21. Slide rail baffle; 22. Ladder passage lifting ring; 23. Ladder passage vertical member B; 24. Ladder passage flange; 25. Ladder passage longitudinal member B; 26. Ladder passage checkered plate; 27. Ladder passage 28. Horizontal bar A; 29. ​​Sliding frame track base; 30. Vertical bar B of ladder passage; 31. Horizontal bar B of ladder passage; 32. Ladder passage baffle; 33. Longitudinal diagonal bar A of ladder passage; 34. Step bar of ladder passage; 35. Longitudinal diagonal bar B of ladder passage; 36. Vertical bar C of ladder passage; 37. Transverse diagonal bar of ladder passage; 38. Locking bolt; 39. Locking device flange; 40. Longitudinal bar of locking device; 41. Diagonal bar of locking device; 42. Drive shaft clamp of locking device; 43. Circular handle of vise; 44. Drive shaft of locking device handle; 45. Sub-plate of locking device flange; 46. Drive clamp bolt; 47. Vise; 48. Air nozzle clamp; 49. Telescopic handle; 50. Drive sub-shaft of locking device; 51. Fixed clamp. Detailed Implementation

[0022] The present invention will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and should not be used to limit the scope of protection of the present invention.

[0023] Example 1 like Figure 1 and Figure 2 As shown, this embodiment provides a bridge inspection vehicle climbing ladder device, including a telescopic sliding frame 5, a vertical climbing ladder channel 7, and a climbing ladder locking device 8; the bottom of the vertical climbing ladder channel 7 is fixedly connected to the bridge inspection vehicle 4; the telescopic sliding frame 5 and the vertical climbing ladder channel 7 are provided with paired sliding components, so that the telescopic sliding frame 5 is slidably connected above the vertical climbing ladder channel 7 in a direction perpendicular to the length of the bridge; the climbing ladder locking device 8 includes a climbing ladder locking bracket and a telescopic clamping mechanism connected to each other; the climbing ladder locking bracket is connected to the vertical climbing ladder channel 7, and the clamping end of the telescopic clamping mechanism is locked to the box girder air nozzle 9. This climbing ladder device 3 safely crosses the external facilities of the bridge beam through the telescopic sliding frame 5, and moves and stops with the bridge inspection vehicle 4. In case of special circumstances where the inspection vehicle stops in the middle of the bridge, the staff can safely evacuate the bridge inspection vehicle 4. When the bridge inspection vehicle 4 is not in operation, it is locked to the flange plate of the box girder wind nozzle 9 by the climbing ladder locking device 8, ensuring the stability of personnel landing and evacuating the bridge inspection vehicle, and improving the overall stability and wind resistance of the vertical climbing ladder passage 7.

[0024] like Figure 3 and Figure 4 As shown, the retractable sliding frame 5 in this embodiment includes a frame body composed of multiple sets of rods. A sliding working platform 14 is provided at the bottom of the frame body, and a first sliding component that can cooperate with a second sliding component of the vertical ladder passage 7 is also provided on the rods at the bottom of the frame body. The frame body includes a bottom sliding horizontal frame and sliding vertical frames arranged parallel to the upper sides of the sliding horizontal frame. The sliding working platform 14 is fixedly connected to the sliding horizontal frame; the sliding working platform 14 is flush with the top surface of the box girder 1. When the retractable sliding frame 5 slides and extends towards the bridge, maintenance personnel can climb over the railing 2 from the sliding working platform 14 to evacuate to the bridge deck.

[0025] like Figures 7 to 10As shown, in this embodiment, the vertical ladder passage 7 includes a working frame and a passage frame composed of multiple sets of rods. One side of the bottom of the working frame is provided with a vertical ladder working platform 6, a second sliding component that cooperates with a first sliding component of the retractable sliding frame 5, and a limiting component. The other side of the bottom of the working frame is provided with a passage exit. The passage frame is connected to the bottom of the working frame. The passage frame includes a support portion and a passage portion. The support portion is located at the bottom of the working frame on the side of the second sliding component, and the passage portion is located at the bottom of the working frame on the side of the passage exit. The passage portion is provided with several ladder passage steps 33 for workers to climb the ladder. The working frame includes a horizontal working frame, a longitudinal working frame (both vertical and perpendicular to each other), and a transverse working frame, the longitudinal working frame being perpendicular to the length direction of the bridge; the passage frame includes a longitudinal climbing ladder frame (both vertical and perpendicular to each other) and a transverse climbing ladder frame, the longitudinal climbing ladder frame being perpendicular to the length direction of the bridge; the climbing ladder passage step bar 33 is set on the transverse climbing ladder frame, and the climbing ladder locking bracket of the climbing ladder locking device 8 is connected to the longitudinal climbing ladder frame; the bottom of the passage frame is provided with a climbing ladder passage flange 24 connected to the bridge inspection vehicle 4. Because the entire vertical climbing ladder passage 7 adopts a frame structure, it not only reduces its own weight but also reduces wind resistance, increasing the stability and safety of the entire climbing ladder device 3.

[0026] like Figure 5 and Figure 6 As shown, in this embodiment, the first sliding component includes a slide rail 16 and a sliding frame lifting ring 17, and the second sliding component includes a slide rail 20 and a ladder passage lifting ring 22 that respectively cooperate with the slide rail 16 and the sliding frame lifting ring 17. The slide rail 16 slides along the slide rail 20, and the two ends of the slide rail 20 are provided with slide rail baffles 21 to limit the slide rail 16. When the retractable sliding frame 5 slides away from the vertical ladder passage 7, it is connected and fixed to the ladder passage lifting ring 22 through the sliding frame lifting ring 17, and the slide rail baffles 21 are used as the maximum extension of the retractable sliding frame 5, thereby realizing the retractability of the ladder device 3 and ensuring the safety of the staff logging into and leaving the bridge inspection vehicle 4.

[0027] like Figure 11 As shown, in this embodiment, the ladder locking bracket includes a locking device diagonal rod 40 with both ends fixedly connected to the vertical ladder channel 7, and a clamping plate assembly clamping both sides of the locking device diagonal rod 40. The clamping end of the telescopic clamping mechanism includes a vise 46 for clamping the box girder air nozzle 9 and a telescopic handle 48 for adjusting the opening and closing degree of the vise 46. The end of the clamping end away from the box girder air nozzle 9 is connected to the locking handle 42 through a locking transmission shaft 43. The locking transmission shaft 43 passes through the ladder locking bracket, and the clamping end is also connected to a locking transmission secondary shaft 49 that slides through the clamping plate assembly. The use of the ladder locking device 8 enhances the stability and wind resistance of the ladder device 3, as well as the mobility of the ladder device 3 during use.

[0028] To reduce the weight of the climbing device, in this embodiment, all the rods in the telescopic sliding frame 5, the vertical climbing channel 7, and the climbing locking device 8 are made of aluminum alloy, and each frame that makes up the telescopic sliding frame 5 and the vertical climbing channel 7 is prefabricated by argon arc welding of each rod.

[0029] Example 2 This embodiment provides a bridge inspection vehicle ladder device, which is further optimized based on Embodiment 1 to achieve better technical effects. For details not described in this embodiment, please refer to Embodiment 1.

[0030] like Figures 3 to 6 As shown, in this embodiment, the sliding horizontal frame is rectangular, consisting of a sliding frame horizontal bar 12 and a sliding frame vertical bar 13 connected perpendicularly to each other; the sliding vertical frame is rectangular, consisting of a sliding frame vertical bar 10 and a sliding frame vertical bar 11 connected perpendicularly to each other; the sliding frame vertical bar 10 is parallel to the sliding frame vertical bar 13 and shorter than the sliding frame vertical bar 13; the portion of the sliding frame vertical bar 13 that extends beyond the sliding frame vertical bar 10 is connected to the sliding frame vertical bar 11 by a sliding frame diagonal bar 15; the sliding frame lifting ring 17 is embedded in the sliding frame vertical bar 13 after a hole is opened in it, and is located in the middle position of the sliding frame vertical bar 13.

[0031] like Figures 7 to 10 As shown, in this embodiment, the horizontal working frame is located at the bottom of the working frame and is a rectangular frame composed of ladder passage crossbar A 27, ladder passage vertical bar A 18, ladder passage crossbar B 30, and ladder passage vertical bar C 35. The vertical working frame is vertically connected above the horizontal working frame and is a rectangular frame formed by ladder passage vertical bar A 18 and ladder passage vertical bar A 19. The horizontal working frame is vertically connected above the horizontal working frame and is a rectangular frame formed by ladder passage crossbar A 27 and ladder passage vertical bar B 29. A vertical guardrail surrounding the passage exit is also connected above the horizontal working frame, and several ladder passage crossbars B 30 are provided in the vertical guardrail. A ladder passage patterned plate 26 surrounding the passage exit is also connected inside the horizontal working frame.

[0032] like Figure 7 , Figure 8 and Figure 9As shown, in this embodiment, the longitudinal ladder frame is vertically connected to the bottom of the horizontal working frame and is a rectangular frame formed by the ladder channel longitudinal rods C35 and ladder channel vertical rods B29. Several ladder channel longitudinal rods C35 are arranged in parallel, and a ladder channel longitudinal diagonal rod B34 is provided between adjacent ladder channel longitudinal rods C35 for reinforcement and protection. The transverse ladder frame is vertically connected to the bottom of the horizontal working frame and is a rectangular frame formed by the ladder channel horizontal rods A27 and ladder channel vertical rods B23. Several ladder channel horizontal rods A27 are arranged in parallel, and a ladder channel transverse diagonal rod 36 is provided between adjacent ladder channel horizontal rods A27 for reinforcement and protection. A ladder channel longitudinal diagonal rod A32 is also provided between the bottom of the horizontal working frame and the longitudinal ladder frames on both sides to support the working frame of the vertical ladder channel. The slide rail 20 is welded to the ladder passage baffle 31 and fixed to the ladder passage track base 28. The ladder passage baffle 31 is welded to each vertical rod as a safety protection measure for personnel on the vertical ladder passage 7.

[0033] like Figure 11 and Figure 12 As shown, the two ends of the locking device diagonal rod 40 are connected to the upper and lower horizontal rods through the locking device longitudinal rod 39; the clamping plate assembly includes a locking device transmission shaft clamping plate 41 and a fixed clamping plate 50 fixed to both sides of the locking device diagonal rod 40 by transmission clamping plate bolts 45, one end of the locking device transmission shaft 49 is fixed to the clamping end, and the other end slides through the fixed clamping plate 50; the clamping surface of the vise 46 is fixed to the air nozzle clamping plate 47 by bolts, and the air nozzle clamping plate 47 engages with the box girder air nozzle 9.

[0034] like Figure 13 As shown, the locking device longitudinal rod 39 is connected and fixed to the horizontal rod through the locking device flange 38 and the locking device flange sub-plate 44 clamped on both sides of the horizontal rod, as well as the locking fixing bolt 37.

[0035] The method of using the bridge inspection vehicle ladder device described in this embodiment is as follows: (1) When the staff board the bridge inspection vehicle 4, the outermost sliding frame longitudinal bar B13 of the telescopic sliding frame 5 is placed on the base of the railing 2, the telescopic sliding frame 5 is in the extended state, and the sliding frame lifting ring 17 in the telescopic sliding frame 5 is connected to the climbing passage lifting ring 22, so that the telescopic sliding frame 5 is in a fixed state when it is extended. The staff use the telescopic sliding frame 5 in the extended state as a safe passage for boarding and leaving the inspection vehicle.

[0036] (2) When the maintenance personnel land on the vertical ladder working platform 6, they will disconnect the sliding frame lifting ring 17 from the ladder channel lifting ring 22 and push the telescopic sliding frame 5 back into the vertical ladder working platform 6. Then, they will fix the sliding frame lifting ring 17 to the ladder channel lifting ring 22. At this time, when the bridge inspection vehicle 4 encounters bridge auxiliary facilities during operation, the new ladder device 3 can safely avoid them without any hidden dangers.

[0037] (3) The staff climbs up and down in the vertical ladder passage 7 through the ladder passage step bar 33. At this time, the ladder locking device 8 is locked. When the bridge inspection vehicle 4 is running, first turn the round handle 42 of the vise 46 to separate the air nozzle clamp 47 from the box girder air nozzle 9. Then turn the telescopic handle 48 in the ladder locking device 8 to drive the transmission shaft 43 of the transmission locking device handle, so that the vise 46 moves away from the box girder air nozzle 9 along the transmission sub-shaft 49 of the locking device. At this time, the ladder locking device 8 is unlocked. And during the operation of the bridge inspection vehicle 4, the air nozzle clamp 47 will not collide with the box girder air nozzle 9, and is in a safe state.

[0038] (4) When the bridge inspection vehicle 4 stops at a certain working point within the bridge span, the above process can be reversed to clamp the air nozzle plate 47 of the ladder locking device 8 with the box girder air nozzle 9 to enhance the stability of the vertical ladder passage 7.

[0039] (5) If the bridge inspection vehicle 4 suddenly stops within the bridge span during operation and cannot be moved again, the telescopic sliding frame 5 can be extended, and the sliding frame lifting ring 17 can be fastened to the ladder passage lifting ring 22. The personnel can then evacuate by climbing over the bridge railing 2 using the telescopic sliding frame 5, thus ensuring the safety of the maintenance personnel. After the inspection vehicle has been repaired by professionals, routine maintenance work can resume.

[0040] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model 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, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0041] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0042] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A ladder climbing device for a bridge inspection vehicle, characterized in that, It includes a telescopic sliding frame (5), a vertical ladder passage (7), and a ladder locking device (8); The bottom of the vertical ladder passage (7) is fixedly connected to the bridge inspection vehicle (4); The retractable sliding frame (5) and the vertical climbing ladder channel (7) are provided with matching sliding components, so that the retractable sliding frame (5) is slidably connected above the vertical climbing ladder channel (7) in a direction perpendicular to the length of the bridge; The ladder locking device (8) includes a ladder locking bracket and a telescopic clamping mechanism connected to each other; the ladder locking bracket is connected to the vertical ladder channel (7), and the clamping end of the telescopic clamping mechanism is locked to the box girder air nozzle (9).

2. The bridge inspection vehicle climbing device according to claim 1, characterized in that, The retractable sliding frame (5) includes a frame body composed of multiple sets of rods. The bottom of the frame body is provided with a sliding work platform (14). The rods at the bottom of the frame body are also provided with a first sliding component that can cooperate with the second sliding component of the vertical climbing ladder channel (7).

3. The bridge inspection vehicle climbing device according to claim 2, characterized in that, The frame includes a sliding horizontal frame at the bottom and sliding vertical frames arranged parallel to the upper sides of the sliding horizontal frame. The sliding work platform (14) is fixedly connected to the sliding horizontal frame. The sliding work platform (14) is flush with the top surface of the box girder (1).

4. The bridge inspection vehicle climbing device according to claim 1, characterized in that, The vertical climbing ladder channel (7) includes a working frame and a channel frame composed of multiple sets of rods. The bottom side of the working frame is provided with a vertical climbing ladder working platform (6), a second sliding component that cooperates with the first sliding component of the telescopic sliding frame (5), and a limiting component. The other side of the bottom of the working frame is provided with a channel outlet. The channel frame is connected to the bottom of the working frame.

5. The bridge inspection vehicle climbing device according to claim 4, characterized in that, The channel frame includes a support part and a channel part. The support part is located at the bottom of the working frame on one side of the second sliding component, and the channel part is located at the bottom of the working frame on the side of the channel outlet. The channel part is provided with several ladder passage steps (33) for workers to climb the ladder.

6. The bridge inspection vehicle climbing device according to claim 5, characterized in that, The working frame includes a horizontal working frame, a longitudinal working frame that is vertical and perpendicular to each other, and a transverse working frame. The longitudinal working frame is perpendicular to the length direction of the bridge. The passage frame includes a longitudinal climbing ladder frame that is vertical and perpendicular to each other, and a transverse climbing ladder frame. The longitudinal climbing ladder frame is perpendicular to the length direction of the bridge. The climbing ladder passage step bar (33) is set on the transverse climbing ladder frame. The climbing ladder locking bracket of the climbing ladder locking device (8) is connected to the longitudinal climbing ladder frame. The bottom of the passage frame is provided with a climbing ladder passage flange (24) connected to the bridge inspection vehicle (4).

7. The bridge inspection vehicle climbing device according to claim 2 or claim 4, characterized in that, The first sliding assembly includes a slide rail (16) and a sliding frame lifting ring (17). The second sliding assembly includes a slide rail (20) and a ladder channel lifting ring (22) that respectively cooperate with the slide rail (16) and the sliding frame lifting ring (17). The slide rail (16) slides along the slide rail (20). The two ends of the slide rail (20) are provided with slide rail baffles (21) that limit the slide rail (16). When the telescopic sliding frame (5) slides away from the vertical ladder channel (7), it is connected and fixed to the ladder channel lifting ring (22) through the sliding frame lifting ring (17).

8. The bridge inspection vehicle climbing ladder device according to claim 1, characterized in that, The ladder locking bracket includes a locking device diagonal rod (40) fixedly connected to the vertical ladder channel (7) at both ends and a clamping plate assembly clamping the two sides of the locking device diagonal rod (40). The clamping end of the telescopic clamping mechanism includes jaws for clamping the box girder air nozzle (9) and a telescopic handle (48) for adjusting the opening and closing degree of the jaws. The end of the clamping end away from the box girder air nozzle (9) is connected to the locking handle (42) through the locking transmission shaft (43). The locking transmission shaft (43) passes through the ladder locking bracket. The clamping end is also connected to a locking transmission sub-shaft (49) that slides through the clamping plate assembly.

9. The bridge inspection vehicle climbing device according to claim 8, characterized in that, The two ends of the locking device diagonal bar (40) are connected to the upper and lower horizontal bars through the locking device longitudinal bar (39); The clamping plate assembly includes a locking device drive shaft clamping plate (41) and a fixed clamping plate (50) fixed to both sides of the locking device inclined rod (40) by a drive clamping plate bolt (45). One end of the locking device drive shaft (49) is fixed to the clamping end, and the other end slides through the fixed clamping plate (50). The clamping surface of the jaws is fixed to the nozzle clamp (47) by bolts, and the nozzle clamp (47) engages with the box girder nozzle (9).

10. The bridge inspection vehicle climbing ladder device according to claim 1, characterized in that, All the rods in the telescopic sliding frame (5), the vertical climbing ladder channel (7) and the climbing ladder locking device (8) are made of aluminum alloy. The frames that make up the telescopic sliding frame (5) and the vertical climbing ladder channel (7) are all assembled by argon arc welding of each rod.

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