A type of maintenance vehicle that can cross piers and its working method

Abstract

This invention discloses a cross-beam maintenance vehicle and its working method. A longitudinal track is installed at the bottom of each span of a steel beam, and a transverse track frame is installed below the longitudinal track. A suspended platform is then connected to the transverse track frame. The suspended platform contains a lifting platform that can adjust the working height. Maintenance personnel move with the suspended platform, crossing between adjacent steel beam spans via the cross-beam platform to achieve comprehensive coverage of the bottom maintenance area of ​​the steel beam. With this cross-beam maintenance vehicle, maintenance personnel can move at any time, safely, quickly, and efficiently entering the work position for mobile inspection or maintenance work. The operation does not disrupt traffic. The suspended platform design makes the equipment lightweight, easy to install and operate, and convenient to move. It is also simple to manufacture, resulting in low construction and maintenance costs.

Description

Technical Field

[0001] This invention relates to the field of bridge maintenance technology. More specifically, this invention relates to a bridge-crossing maintenance vehicle and its operating method. Background Technology

[0002] With the rapid development of my country's modern steel industry and the ever-evolving technology of steel structure processing and manufacturing, steel components are widely used in bridge design and construction due to their small cross-section, light weight, good plasticity and toughness, and relatively high compressive and shear strength. Compared with traditional concrete beams, steel beams have the advantages of high prefabrication, high construction precision, good economic benefits, and short construction period. Combined with the excellent properties of steel structures, steel beams have become the preferred beam type for long-span bridges. However, steel structure bridges are prone to corrosion and rust, requiring regular maintenance and upkeep.

[0003] To ensure the effectiveness of steel structure bridges and extend their service life, a device or equipment needs to be designed to assist in the inspection and maintenance of steel structure bridges. This device or equipment must be simple to operate, have a high safety factor, and good stability. It should not affect traffic or navigation under the bridge during operation. Its working range should cover the bottom plate, web, and flange areas of the steel beams, providing comprehensive support for bridge inspection and maintenance. The difficulty of achieving comprehensive coverage of the bridge's underside varies depending on the bridge's cross-section. For example, when the bridge cross-section consists of a pair of closely joined steel beams, the overall bridge width is large, requiring significant movement in the transverse direction. Furthermore, the pair of piers located at the bottom of the steel beams present a considerable obstruction. Traditional methods, such as installing maintenance vehicles on both sides of the transverse direction and using tracks at the bridge's edge to move them longitudinally, are inconvenient for maintenance near the bridge's centerline and cannot pass over piers. Frequent up-and-down movement or adjustments to the vehicle's posture are necessary when passing piers. This results in high overall maintenance costs, large space requirements, and significant safety risks. Currently, there is no satisfactory solution to the problems of large maintenance scope and high maintenance difficulty associated with this type of large-span bridge cross-section. Summary of the Invention

[0004] One object of the present invention is to solve at least the above-mentioned problems and to provide at least the advantages that will be described later.

[0005] Another objective of this invention is to provide a bridge-crossing maintenance vehicle and its working method to solve the technical problems of inadequate maintenance coverage and low maintenance efficiency for existing wide steel structure bridges.

[0006] To achieve these objectives and other advantages according to the present invention, a gate-crossing maintenance vehicle is provided, comprising:

[0007] The longitudinal track system includes a pair of inner beam bottom tracks, a pair of outer beam bottom tracks, and a connecting base. The inner beam bottom tracks are symmetrically arranged at the bottom of the bottom plate of the steel beam along the longitudinal direction of the bridge, and the outer beam bottom tracks are symmetrically arranged at the bottom of the wing plate of the steel beam along the longitudinal direction of the bridge. The inner beam bottom tracks and the outer beam bottom tracks are fixedly connected to the steel beam through the connecting base.

[0008] The transverse track system includes transverse track frames installed at the bottom of each span of steel beam along the transverse direction of the bridge. The length of the transverse track frame is slightly greater than the maximum width of the bridge deck. Both ends of the transverse track frame are connected upwards to the suspension rods, which are suspended on the corresponding side of the outer longitudinal track and slidably connected to the outer longitudinal track. A transverse travel system is symmetrically installed near the middle of the transverse track frame. The transverse travel system is connected to the corresponding position of the inner beam bottom track and can move along the extension direction of the inner beam bottom track. A travel device is installed at the bottom of the transverse track frame. The travel device includes a travel wheel set that can rotate along the length direction of the transverse track frame and a drive motor that drives the travel wheel set to move.

[0009] The pier suspension system includes a pier platform set between two adjacent piers in the transverse direction of the bridge. The top two ends of the pier platform are suspended and supported on the bottom of the two adjacent side wings of the two steel beams located at the piers. Pier rails are set on the pier platform along the longitudinal direction of the bridge.

[0010] The suspended platform travel system includes a suspended platform and a lifting platform. The top of the suspended platform is suspended from the bottom of the traveling wheel set, and a height space for detachment from the suspension is provided at the bottom of the traveling wheel set. A generator and an electrical control cabinet are installed on the suspended platform, and the electrical control cabinet is electrically connected to the generator. The lifting platform is installed inside the suspended platform. Vertical jacks are installed at the bottom of the suspended platform. Traveling casters are installed at the bottom of the suspended platform corresponding to the pier crossing track. The traveling casters, the lateral travel system, the drive motor and the electrical control cabinet are electrically connected. The length of the two ends of the pier crossing track that extends beyond the pier is greater than the length of the suspended platform in the longitudinal direction of the bridge.

[0011] The upper and lower bridge passage is located on the outer side of the upper end of the steel beam and extends downward to the top surface of the end of the transverse rail frame.

[0012] Preferably, the transverse rail frame includes a pair of parallel horizontal hanging rods, with multiple support rods connecting the pair of horizontal hanging rods. Adjacent support rods are spaced apart to allow the lifting platform to pass through vertically. The support rods at the ends of the horizontal hanging rods include a pair of spaced longitudinal rods, with the ends of the longitudinal rods fixedly connected to the inner side of the horizontal hanging rods. Multiple transverse partitions are spaced apart between the pair of longitudinal rods.

[0013] Preferably, the access bridge includes vertical bars spaced apart along the longitudinal direction of the bridge, with horizontally arranged connecting bars spaced apart between adjacent vertical bars, a ladder connected to the side of the vertical bar away from the steel beam, a horizontally arranged middle bar connected to the side of the vertical bar facing the steel beam, the other end of the middle bar connected to the suspension rod, the bottom of each vertical bar fixedly connected to the upper surface of a transverse partition, and a docking platform provided on the upper surface of the end of the transverse sliding rail frame below the ladder.

[0014] Preferably, the pier platform includes two rows of vertical hanging rods arranged opposite each other along the longitudinal direction of the bridge. The top of each row of vertical hanging rods is connected to the bottom of the steel beam wing plate on the corresponding side. Multiple side rods are connected to each row of vertical hanging rods. The multiple side rods on each side are connected together to form an isosceles triangle frame. A horizontally arranged pier base plate is connected between the bottoms of the two isosceles triangle frames and between the bottoms of the two rows of vertical hanging rods. The pier track is fixed to the upper surface of the pier base plate. The length of the two ends of the pier track that exceeds the outermost vertical hanging rod at the corresponding end is greater than the length of the suspended platform in the longitudinal direction of the bridge. An adjusting screw is connected between the outer side of the vertical hanging rod and the web plate of the steel beam on the corresponding side.

[0015] Preferably, the traveling wheel set on each of the traverse rails includes:

[0016] The roller assembly consists of four symmetrically arranged sets corresponding to the top corner of the suspended platform. The cross section of the horizontal hanging rod is a vertically arranged I-shaped structure. Each set of rollers is slidably arranged at both ends of the lower wing plate of the horizontal hanging rod.

[0017] The C-shaped component, with its opening facing upward, includes a pair of vertical plates at both ends and a hanging basket rod connected between the pair of vertical plates. Each set of rollers is integrated into a C-shaped component. All rollers on the same side in each set of rollers are connected to the same vertical plate by bearings. The drive motor is fixed to the outside of one of the vertical plates and its output end is used to drive all rollers on the corresponding side to rotate. The height space is separated between the top of the hanging basket rod and the bottom of the horizontal hanging rod.

[0018] At each of the top corners of the suspended platform, a hook is provided corresponding to the C-shaped component and hangs upwards. The hook passes through the height space and is hung on the hanging rod of the suspended platform and is equipped with a hook lock.

[0019] The present invention also provides a working method for a gate-type maintenance vehicle, comprising the following steps:

[0020] S1: Before the steel beam construction, the longitudinal track and the pier platform are installed simultaneously. After the steel beam construction is completed, the transverse track frame and the transverse travel system are installed.

[0021] S2: Assemble the suspended platform walking system by installing and connecting the walking equipment and the suspended platform to the bottom of one end of the transverse rail frame near the upper and lower bridge passage;

[0022] S3: Maintenance workers enter the suspended basket through the upper and lower bridge passage, start the generator, turn on the control cabinet to supply power to the line, control the traveling equipment to move the suspended basket on the transverse rail frame, start the transverse traveling system, and move the transverse rail frame longitudinally along the longitudinal rail system. By controlling the rise and fall of the lifting platform, the maintenance work can cover the flange of the steel beam.

[0023] S4: The suspended platform is moved longitudinally to the range of the pier-crossing platform, the vertical jack is raised, so that the top of the suspended platform is detached from the suspension of the traveling wheel set, the traveling equipment is operated to leave the plane position where the top of the suspended platform is located, the vertical jack slowly returns to its original position, and the traveling casters of the suspended platform slowly fall onto the pier-crossing track. The traveling casters are controlled by the control cabinet to make the suspended platform move slowly along the pier-crossing track, thereby realizing the pier-crossing;

[0024] S5: After the suspended platform trolley passes the pier, the vertical jack is raised, and the traveling device on the next transverse rail is operated to move closer to the suspended platform until the top of the suspended platform enters the height space. The vertical jack is then slowly returned to its original position, so that the suspended platform is suspended on the moving wheel assembly on the transverse rail of the next span, and the maintenance work of the next span begins.

[0025] The present invention has at least the following beneficial effects: The cross-beam maintenance vehicle of the present invention sets longitudinal tracks at the bottom of each span of steel beams, sets transverse rail frames under the longitudinal tracks, and connects the suspended basket to the transverse rail frames. The suspended basket is equipped with a lifting platform that can change the construction height. Maintenance personnel move with the suspended basket and cross the beams between adjacent spans of steel beams through the cross-beam platform, achieving full coverage of the maintenance range at the bottom of the steel beams. With the cross-beam maintenance vehicle, maintenance personnel can move their positions at any time and safely, quickly and efficiently enter the work position to carry out mobile inspection or maintenance work. The work does not affect traffic. The suspended basket walking method makes the equipment lightweight, easy to install and operate, and has the advantages of easy mobility and simple manufacturing. The construction and maintenance costs are low.

[0026] Other advantages, objectives and features of the present invention will become apparent in part from the following description, and in part from those skilled in the art through study and practice of the invention. Attached Figure Description

[0027] Figure 1 This is a front view of the pier maintenance vehicle of the present invention installed at the bottom of the steel beam;

[0028] Figure 2 This is a side view of the pier maintenance vehicle of the present invention installed at the bottom of the steel beam;

[0029] Figure 3 This is a side view of the pier crossing platform of the present invention;

[0030] Figure 4 This is a top view of the transverse guide rail frame of the present invention;

[0031] Instruction manual drawing reference numerals: 1. Steel beam, 2. Pier, 3. Inner beam bottom track, 4. Outer beam bottom track, 5. Connecting base, 6. Horizontal sliding rail frame, 7. Hanging rod, 8. Traveling equipment, 9. Traveling wheel set, 10. Drive motor, 11. Pier crossing platform, 12. Pier crossing track, 13. Suspended basket, 14. Lifting platform, 15. Generator, 16. Electrical control cabinet, 17. Vertical jack, 18. Traveling casters, 19. Bridge access passage, 20. Horizontal hanging rod, 21. Support frame rod, 22. Longitudinal rod, 23. Horizontal partition rod, 24. Vertical rod, 25. Ladder, 26. Center rod, 27. Connecting platform, 28. Vertical hanging rod, 29. Side rod, 30. Pier bottom plate, 31. Adjusting screw rod, 32. Roller, 33. Vertical plate, 34. Suspended basket hanging rod, 35. Hook. Detailed Implementation

[0032] The present invention will now be described in further detail with reference to the accompanying drawings, so that those skilled in the art can implement it based on the description.

[0033] It should be noted that, unless otherwise specified, the experimental methods described in the following embodiments are all conventional methods, and the reagents and materials described are all commercially available unless otherwise specified. In the description of this invention, the terms "lateral", "longitudinal", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" 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.

[0034] like Figure 1-3 As shown, the present invention provides a gate-crossing maintenance vehicle, comprising:

[0035] The longitudinal track system includes a pair of inner beam bottom tracks 3, a pair of outer beam bottom tracks 4, and a connecting base 5. The inner beam bottom tracks 3 are symmetrically arranged at the bottom of the bottom plate of the steel beam 1 along the longitudinal direction of the bridge, and the outer beam bottom tracks 4 are symmetrically arranged at the bottom of the wing plate of the steel beam 1 along the longitudinal direction of the bridge. The inner beam bottom tracks 3 and the outer beam bottom tracks 4 are fixedly connected to the steel beam 1 through the connecting base 5.

[0036] The transverse track system includes transverse track frames 6 installed at the bottom of each span of steel beam 1 along the transverse direction of the bridge. The length of the transverse track frame 6 is slightly greater than the maximum width of the bridge deck. The two ends of the transverse track frame 6 are respectively connected to the upper part of the suspension rod 7. The suspension rod 7 is suspended on the outer longitudinal track on the corresponding side and is slidably connected to the outer longitudinal track. A transverse travel system is symmetrically arranged near the middle of the transverse track frame 6. The transverse travel system is connected to the inner beam bottom track 3 at the corresponding position and can move along the extension direction of the inner beam bottom track 3. A travel device 8 is installed at the bottom of the transverse track frame 6. The travel device 8 includes a travel wheel set 9 that can rotate along the length direction of the transverse track frame 6 and a drive motor 10 that drives the travel wheel set 9 to move.

[0037] The pier suspension system includes a pier platform 11 set between two adjacent piers 2 in the transverse direction of the bridge. The top two ends of the pier platform 11 are suspended and supported on the bottom of the two adjacent side wings of the two steel beams 1 located at the piers 2. Pier rails 12 are set on the pier platform 11 along the longitudinal direction of the bridge.

[0038] The suspended platform 13 travel system includes a suspended platform 13 and a lifting platform 14. The top of the suspended platform 13 is suspended from the bottom of the traveling wheel set 9, and a height space for detachment from the suspension is provided at the bottom of the traveling wheel set 9. A generator 15 and an electrical control cabinet 16 are installed on the suspended platform 13. The electrical control cabinet 16 is electrically connected to the generator 15. The lifting platform 14 is installed inside the suspended platform 13. A vertical jack 17 is installed downward at the bottom of the suspended platform 13. A traveling caster 18 is installed at the bottom of the suspended platform 13 corresponding to the pier rail 12. The traveling caster 18, the lateral travel system, the drive motor 10 and the electrical control cabinet 16 are electrically connected. The length of both ends of the pier rail 12 that extends beyond the pier 2 is greater than the length of the suspended platform 13 in the longitudinal direction of the bridge.

[0039] The upper and lower bridge passage 19 is located on the outer side of the upper end of the steel beam 1 and extends downward to the top surface of the end of the transverse rail frame 6.

[0040] The longitudinal track, transverse track frame 6, suspended platform 13, and bridge access passage 19 are mainly made of structural steel, which is easy to connect with the steel beam 1. They also have high structural strength and are lightweight. The dimensions of the suspended platform 13 need to meet the requirements for crossing the pier, and its height is slightly higher than the height of a normal person, providing a closed and protective effect. The height of the pier-crossing track 12 on the pier-crossing platform 11 is slightly lower than the lowest point of the suspended platform 13 after it is suspended on the transverse track frame 6, and its length extends to at least one body length of the suspended platform 13 before and after the pier 2, facilitating the reception of the suspended platform 13 and the lifting platform 14. The maximum design height needs to reach the flange of steel beam 1 so that the maintenance vehicle can achieve full coverage of the steel beam 1 for maintenance. The suspended basket 13 is powered by a portable generator 15 to provide power for the longitudinal and lateral movement of the suspended basket 13 and the operation of the lifting platform 14. The circuit of the entire device is controlled by the electrical control cabinet 16. The lateral movement system and drive motor 10 have external power inputs to facilitate connection with the generator 15. The setting of the portable generator 15 and the electrical control cabinet 16 makes the entire structural system not require external circuits, solving the problem of bridge deck wiring.

[0041] The transverse track frame 6 moves upward along the longitudinal track on the longitudinal bridge via the transverse travel system. The suspended basket 13 moves upward along the transverse track frame 6 on the transverse bridge via the travel device 8. Maintenance personnel can move up and down on the lifting platform 14. Maintenance personnel descend from the bridge deck to the transverse track frame 6 via the bridge access passage 19 and connect via the lifting platform 14 inside the suspended basket 13. When crossing the pier, the suspended basket 13 is moved above the pier crossing platform 11, and the entire suspended basket 13 is lifted by the vertical jack 17, disengaging from the suspension connection with the travel device 8 and the transverse track frame 6. The vertical jack 17 is then lowered until the suspended basket 13 is completely on the pier crossing track 12, and it moves along the pier crossing track 12 to the other end, thus crossing the pier. When the next span of the transverse track frame 6 approaches, it is re-suspended and connected.

[0042] The cross-beam maintenance vehicle of the present invention has a longitudinal track at the bottom of each span of steel beam 1, a transverse track frame 6 under the longitudinal track, and a suspended basket 13 connected to the transverse track frame. The suspended basket 13 is equipped with a lifting platform 14 that can change the construction height. Maintenance personnel move with the suspended basket 13 and cross the beams between adjacent spans of steel beam 1 through the cross-beam platform 11, so as to achieve full coverage of the maintenance range at the bottom of the steel beam 1. With the cross-beam maintenance vehicle, maintenance personnel can move their positions at any time and safely, quickly and efficiently enter the work position to carry out mobile inspection or maintenance work. The work does not affect traffic. The suspended basket 13 is used for suspension and movement. The equipment is lightweight, easy to install and operate, and has the advantages of easy mobility and simple manufacturing. The construction and maintenance costs are low.

[0043] In another technical solution, such as Figure 4As shown, the transverse rail frame 6 includes a pair of parallel horizontal hanging rods 20, and multiple support rods 21 are connected between the pair of horizontal hanging rods 20. The adjacent support rods 21 are spaced apart to allow the lifting platform 14 to pass through vertically. The support rods 21 located at the ends of the horizontal hanging rods 20 include a pair of spaced longitudinal rods 22. The ends of the longitudinal rods 22 are fixedly connected to the inner side of the horizontal hanging rods 20. Multiple transverse partitions 23 are spaced apart between the pair of longitudinal rods 22.

[0044] By setting the transverse rail frame 6 as a frame structure, the structural weight is reduced and it is easier to move along the longitudinal rail. At the same time, the spacing is set close to the length and width of the basket 13, which makes it easy for maintenance workers to go up and down for maintenance through the plane space between adjacent support rods 21. For the two support rods 21 set at the end, the form of double longitudinal rods 22 is adopted, and transverse partitions 23 are set to strengthen the structural connection strength at the end.

[0045] In another technical solution, such as Figure 1 As shown, the upper and lower bridge passage 19 includes vertical bars 24 spaced apart along the longitudinal direction of the bridge. Horizontally connected connecting rods are spaced apart between adjacent vertical bars 24. A ladder 25 is connected to the side of the vertical bar 24 away from the steel beam 1, and a horizontally connected middle rod 26 is connected to the side of the vertical bar 24 facing the steel beam 1. The other end of the middle rod 26 is connected to the hanging rod 7. The bottom of each vertical bar 24 is fixedly connected to the upper surface of a horizontal partition 23. A docking platform 27 is provided on the upper surface of the end of the transverse rail frame 6 below the ladder 25.

[0046] The access passage 19 is located on the outer edge of the steel beam 1 and connected to the transverse rail frame 6. It moves synchronously with the transverse rail frame 6. The bottom of the access passage 19 is fixedly connected to the transverse partition 23 in the same vertical position and is laterally connected to the suspension rod 7. The docking platform 27 is convenient for standing. From the side of the bridge deck, the passage passes through the ladder 25, the docking platform 27, the space between the middle rod 26 and the transverse rail frame 6, a pair of support rods 21 at the end, and the lifting platform 14 to enter the basket 13.

[0047] In another technical solution, such as Figure 1 , Figure 3As shown, the pier platform 11 includes two rows of vertical hanging rods 28 arranged opposite each other along the longitudinal direction of the bridge. The top of each row of vertical hanging rods 28 is connected to the bottom of the wing plate of the steel beam 1 on the corresponding side. Multiple side rods 29 are connected to each row of vertical hanging rods 28. The multiple side rods 29 on each side are connected together to form an isosceles triangle frame. The bottom of the two isosceles triangle frames and the bottom of the two rows of vertical hanging rods 28 are connected together to a horizontally arranged pier base plate 30. The pier track 12 is fixed to the upper surface of the pier base plate 30. The length of the two ends of the pier track 12 that exceeds the outermost vertical hanging rod 28 of the corresponding end is greater than the length of the suspended basket 13 in the longitudinal direction of the bridge. An adjusting screw 31 is connected between the outer side of the vertical hanging rod 28 and the web plate of the steel beam 1 on the corresponding side.

[0048] The side rods 29 on both sides of the pier platform 11 are connected to the vertical hanging rods 28 to form an isosceles triangular truss structure. It is mainly supported by being suspended under the wing plates of the steel beam 1. The two sides are supported and connected to the web of the steel beam 1. The length of the adjusting screw 31 is adjusted according to the spacing of the web of the adjacent steel beam 1 to ensure the stability of the connection of the pier platform 11 structure. The adjusting screw 31 generally includes a ball screw and a pair of screw nuts. The screw nuts are sleeved on the ball screw of the transmission connection seat. A support sleeve is sleeved on the outside of the two screw nuts respectively. The support sleeves at both ends are connected to the web of the steel beam 1 and the vertical hanging rod 28 respectively.

[0049] In another technical solution, such as Figure 2 As shown, the traveling wheel set 9 on each of the transverse rail frames 6 includes:

[0050] There are 32 sets of rollers, four sets of which are symmetrically arranged at the top corner of the suspended basket 13. The cross section of the horizontal hanging rod 20 is a vertically arranged I-shaped structure. Each set of 32 rollers is slidably arranged at both ends of the lower wing plate of the horizontal hanging rod 20.

[0051] The C-shaped component, with its opening facing upward, includes a pair of vertical plates 33 at both ends and a hanging basket rod 34 connected between the pair of vertical plates 33. Each set of rollers 32 is integrated on a C-shaped component. All rollers 32 on the same side in each set of rollers 32 are connected to the same vertical plate 33 by bearings. The drive motor 10 is fixed to the outside of one of the vertical plates 33 and its output end is used to drive all rollers 32 on the corresponding side to rotate. The height space is separated between the top of the hanging basket rod 34 and the bottom of the horizontal hanging rod 20.

[0052] At each of the top corners of the suspended basket 13, a hook 35 is provided upwards corresponding to the C-shaped component. The hook 35 passes through the height space and hangs on the hanging rod 34 of the suspended basket, and is provided with a hook 35 lock.

[0053] The horizontal support rod 20 has an I-shaped structure. The upper part of the upper wing plate and the upper half of the web plate are fixedly connected to the support rod 21. The lower half of the web plate and the lower wing plate form an inverted T-shaped structure, which facilitates the placement and support of the rollers 32. Each of the multiple rollers 32 is coaxially fixedly connected to a rotating gear. Adjacent gears mesh with a transmission gear. The transmission gear meshes with a drive gear at the output end of the drive motor 10, thereby enabling the drive motor 10 to synchronously drive the multiple rollers 32 to rotate and move along the horizontal support rod 20. The rotating gear, transmission gear, and drive gear... The gears are respectively mounted on the vertical plate 33 of the C-shaped part through bearings. The drive motor 10 is fixed on the vertical plate 33. The bottom of the vertical plate 33 is fixedly connected and connected to the hanging basket rod 34. One of the hanging basket rods 34 with high strength is used to be movably connected to the top of the hanging basket 13. The hook 35 is supported on the hanging basket rod 34 and locked by the hook 35 lock. When it is necessary to disconnect the connection, first unlock the hook 35 lock, then lift the hanging basket 13 to raise the position of the hook 35 away from the height of the hanging basket rod 34, move the hanging basket rod 34 horizontally, and then lower the hook 35.

[0054] This invention also provides a working method for a gate-type maintenance vehicle, such as... Figure 1-4 As shown, it includes the following steps:

[0055] S1: Before the construction of steel beam 1, the longitudinal track and the pier platform 11 are installed simultaneously. After the construction of steel beam 1 is completed, the transverse track frame 6 and the transverse travel system are installed. The transverse travel system is generally in the form of a similar traveling device 8 with drive wheels and a motor or a traveling trolley, which only needs to drive the transverse track frame 6 to move.

[0056] S2: Assemble the walking system of the suspended platform 13, and install the walking device 8 and the suspended platform 13 on the bottom of one end of the transverse rail frame 6 near the upper and lower bridge passage 19.

[0057] S3: Maintenance workers enter the suspended basket 13 through the upper and lower bridge passage 19, start the generator 15, turn on the control cabinet to supply power to the line, control the traveling equipment 8 to move the suspended basket 13 on the transverse rail frame 6, start the transverse traveling system, and move the transverse rail frame 6 longitudinally along the longitudinal rail system. By controlling the rise and fall of the lifting platform 14, the maintenance work can cover the flange of the steel beam 1.

[0058] S4: The suspended basket 13 is moved longitudinally to the range of the pier-crossing platform 11, and the vertical jack 17 is raised, so that the top of the suspended basket 13 is disengaged from the suspension of the traveling wheel set 9. The traveling device 8 is operated to leave the plane position where the top of the suspended basket 13 is located. The vertical jack 17 slowly returns to its original position, and the traveling casters 18 of the suspended basket 13 slowly fall onto the pier-crossing track 12. The traveling casters 18 are controlled by the control cabinet to make the suspended basket 13 move slowly along the pier-crossing track 12, thereby realizing the pier crossing.

[0059] S5: After the suspended platform 13 passes the pier, the vertical jack 17 is raised, and the traveling device 8 on the next transverse rail frame 6 is operated to move close to the suspended platform 13 until the top of the suspended platform 13 enters the height space. The vertical jack 17 slowly returns to its original position, so that the suspended platform 13 is suspended on the moving wheel set on the transverse rail frame 6 of the next span, and the maintenance work of the next span begins.

[0060] The longitudinal track, transverse track frame 6, and transverse platform 11 of the pier support structure, designed according to the shape of steel beam 1, serve as the movement track for the suspended platform 13. Combined with a lifting platform 14 installed within the suspended platform 13, it allows for smooth passage over piers, achieving comprehensive coverage of the entire bridge's underside for maintenance. A generator 15 provides power within the suspended platform 13. When movement is required, the electrical control cabinet 16 controls the power supply and operation of the traveling equipment 8. Access channels 19, designed to guide maintenance workers up and down the bridge, are constructed using the space at the wing plates and webs of steel beam 1, facilitating safe and convenient entry into the suspended platform 13. The platform moves horizontally with the transverse track frame 6 and the suspended platform 13, greatly simplifying maintenance work. The entire layout of the work and structural equipment occupies minimal space and does not obstruct existing traffic flow above or below the bridge. Microprocessors and remote controls with communication connections can be installed in the transverse traveling system, the upgrading platform, and the traveling equipment 8, further facilitating remote control. Suspended platforms 13 can also be installed at the bottom of steel beams 1 in different spans for simultaneous construction, improving maintenance efficiency.

[0061] Although embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for the present invention. For those skilled in the art, other modifications can be easily made. Therefore, without departing from the general concept defined by the claims and their equivalents, the present invention is not limited to the specific details and illustrations shown and described herein.

Claims

1. A bridge inspection car, characterized by, The application relates to a longitudinal and transverse moving rail system for a steel bridge. The longitudinal moving rail system comprises a pair of inner beam bottom rails and a pair of outer beam bottom rails, the inner beam bottom rails are symmetrically arranged at the bottom of the bottom plate of the steel beam in the longitudinal bridge direction, the outer beam bottom rails are symmetrically arranged at the bottom of the wing plate of the steel beam in the longitudinal bridge direction, and the inner beam bottom rails and the outer beam bottom rails are fixedly connected with the steel beam through connecting bases respectively; The transverse moving rail system comprises a transverse moving rail frame which is arranged at the bottom of each span steel beam in the transverse bridge direction, the length of the transverse moving rail frame is slightly greater than the maximum width of the bridge surface, two ends of the transverse moving rail frame are upwardly connected with hangers, the hangers are hung on the outer beam bottom rails on the corresponding sides and are in sliding connection with the outer beam bottom rails, a transverse moving walking system is symmetrically arranged at a position close to the middle part of the transverse moving rail frame, the transverse moving walking system is connected with the inner beam bottom rails at the corresponding positions and can move along the extension direction of the inner beam bottom rails, a walking device is arranged at the bottom of the transverse moving rail frame, the walking device comprises walking wheel groups which can rotate in the length direction of the transverse moving rail frame and driving motors which drive the walking wheel groups to move; The pier passing suspension system comprises a pier passing platform which is arranged between two adjacent bridge piers in the transverse bridge direction, the two ends of the top of the pier passing platform are suspended and supported at the bottoms of the two wing plates on the two sides of the steel beam which are adjacent to the bridge piers, and the pier passing platform is provided with a pier passing rail in the longitudinal bridge direction; The hanging basket walking system comprises a hanging basket and a lifting platform, the top of the hanging basket is hung at the bottom of the walking wheel groups and is provided with a height space for disengaging the hanging at the bottom of the walking wheel groups, a generator and an electric control cabinet are arranged on the hanging basket, the electric control cabinet is electrically connected with the generator, the lifting platform is arranged in the hanging basket, a vertical jack is arranged at the bottom of the hanging basket downwards, walking foot wheels are arranged at the bottom of the hanging basket and correspond to the pier passing rail, the walking foot wheels, the transverse moving walking system and the driving motors are electrically connected with the electric control cabinet, and the lengths of the two ends of the pier passing rail are greater than the length of the hanging basket in the longitudinal bridge direction. The up-and-down bridge passage is arranged at the outer side of the upper end of the steel beam and extends downwards to the top surface of the end of the transverse moving rail frame.

2. The pit-type service car as set forth in claim 1, wherein, The transverse moving rail frame comprises a pair of parallel arranged transverse hanging rods, a plurality of support frame rods are connected between the two transverse hanging rods, the adjacent support frame rods are spaced to form a plane space for the lifting platform to pass upwards and downwards, the support frame rods at the ends of the transverse hanging rods comprise a pair of longitudinally arranged longitudinal rods, the ends of the longitudinal rods are fixedly connected with the inner sides of the transverse hanging rods, and a plurality of transverse spacing rods are connected between the two longitudinal rods.

3. The pit-type service car as set forth in claim 2, wherein, The up-and-down bridge passage comprises vertically arranged vertical rods which are spaced in the longitudinal bridge direction, horizontally arranged connecting rods which are connected between the adjacent vertical rods, a ladder which is connected with one side of the vertical rod away from the steel beam, a horizontally arranged middle rod which is connected with the side of the vertical rod facing the steel beam, the other end of the middle rod is connected with the hanger, the bottom of each vertical rod is fixedly connected with the upper surface of one transverse spacing rod, and a docking platform is arranged at the upper surface of the end of the transverse moving rail frame and below the ladder.

4. The pit-type service car as set forth in claim 3, wherein, The pier passing platform comprises two rows of vertical hanging rods arranged longitudinally and oppositely, the top of each row of vertical hanging rods is connected to the bottom of the wing plate of the steel beam on the corresponding side, a plurality of side rods are connected to each row of vertical hanging rods, the plurality of side rods on each side are integrally connected into an isosceles triangular frame, the bottoms of the two isosceles triangular frames and the bottoms of the two rows of vertical hanging rods are jointly connected to a horizontally arranged pier bottom plate, the pier passing track is fixed to the upper surface of the pier bottom plate, the lengths of the two ends of the pier passing track beyond the outermost vertical hanging rod at the corresponding end are greater than the length of the hanging basket in the longitudinal direction of the bridge, and an adjusting screw rod is connected between the outer side of the vertical hanging rod and the web plate of the steel beam on the corresponding side.

5. The catwalk truck of claim 3 wherein, Each of the walking wheel sets on the transverse moving rail frame comprises: A plurality of roller sets are symmetrically arranged at the top corners of the hanging basket, the cross section of the horizontal hanging rod is a vertically arranged I-shaped structure, and each roller set is slidingly arranged at the two ends of the lower wing plate of the horizontal hanging rod; A C-shaped piece is arranged with the opening direction upward, comprising a pair of vertical plates at the two ends and a hanging basket hanging rod connected between the pair of vertical plates, each roller set is integrally arranged on a C-shaped piece, all the rollers on the same side in each roller set are connected to the same vertical plate through a bearing, the driving motor is fixed to the outer side of one of the vertical plates and has an output end for driving all the rollers on the corresponding side to rotate, and the height space is formed between the upper side of the hanging basket hanging rod and the bottom of the horizontal hanging rod; A hook is arranged on each C-shaped piece at the top corner of the hanging basket and extends through the height space to be hung on the hanging basket hanging rod and is provided with a hook lock.

6. The method of operating a cherry picker service truck of claim 3, wherein, The method comprises the following steps: S1: synchronously installing the longitudinal moving track system and the pier passing platform before the construction of the steel beam, and installing the transverse moving rail frame and the transverse moving walking system after the completion of the construction of the steel beam; S2: assembling the walking system of the hanging basket, and connecting the walking equipment and the hanging basket to the bottom of one end of the transverse moving rail frame close to the up-and-down bridge passage; S3: the maintenance worker enters the hanging basket through the up-and-down bridge passage, starts the generator, turns on the electric control cabinet to supply power to the circuit, controls the walking equipment to move the hanging basket on the transverse moving rail frame, starts the transverse moving walking system to move the transverse moving rail frame along the longitudinal moving track system, and controls the lifting of the lifting platform to cover the maintenance operation to the steel beam flange; S4: the hanging basket is longitudinally moved to the range of the pier passing platform, the vertical jack is lifted, the top of the hanging basket is separated from the suspension of the walking wheel set, the walking equipment is operated to leave the plane position of the top of the hanging basket, the vertical jack is slowly returned to oil, the walking casters of the hanging basket are slowly lowered on the pier passing track, and the walking casters are controlled by the electric control cabinet to slowly move the hanging basket along the pier passing track, so that the pier passing is realized. S5: after the hanging basket passes the pier, the vertical jack is lifted, the walking device on the next horizontal moving rail frame is operated to move close to the hanging basket until the top of the hanging basket enters the height space, the vertical jack is slowly returned to oil, the hanging basket is hung on the walking wheel set on the horizontal moving rail frame of the next span, and the maintenance work of the next span is started.

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