Downward-hanging type bridge maintenance car and installation method thereof

Abstract

The invention discloses a lower hanging type bridge maintenance car and an installation method thereof, the lower hanging type bridge maintenance car comprises a track assembly, a walking portal frame and a main body truss, and is characterized in that the walking portal frame comprises a fixed end walking portal frame and a movable end walking portal frame, the fixed end walking portal frame and the movable end walking portal frame are arranged below a bridge through the track assembly, and the main body truss is arranged on the fixed end walking portal frame. The fixed end walking portal frame and the movable end walking portal frame are each provided with a base capable of being opened and closed, and the main truss can penetrate into the base of the fixed end walking portal frame and the base of the movable end walking portal frame. And the main body truss is fixedly connected with the fixed end walking portal frame, is movably connected in the movable end walking portal frame and can slide in the movable end walking portal frame. The bridge maintenance vehicle provided by the invention adopts a top-to-bottom mounting mode, the mounting difficulty is reduced, and meanwhile, a locking mechanism in a double-locking form is adopted, so that the bridge maintenance vehicle is prevented from shaking and falling off during parking, and the safety of equipment is greatly improved.

Description

Technical Field

[0001] The invention relates to the field of bridge safety detection, and in particular to an under-hung bridge maintenance vehicle and an installation method thereof. Background Art

[0002] As bridge structures become larger and more complex, especially for bridges across water or high-altitude bridges, manual inspection methods cannot effectively cover all parts of the bridge, which is inefficient and has high safety risks. Bridge inspection vehicles can provide a working platform under the bridge, and their installation and use are crucial to ensuring the safety of the bridge.

[0003] Traditional under-hung bridge maintenance vehicles are usually installed from bottom to top, first building a bracket under the bridge, and then installing the maintenance vehicle on the bridge through the bracket. This installation method has many problems. For example, when the bridge is on the water, it is inconvenient to set up the bracket and it will hinder normal navigation. When the bridge deck is high, it is difficult and costly to set up the bracket. In addition, the traditional under-hung bridge maintenance vehicle is suspended at the bottom of the bridge, and has the disadvantages of a single locking mechanism and unstable locking. The maintenance vehicle is prone to shaking when parking, and there is even a safety hazard of falling. Summary of the invention

[0004] In view of the shortcomings of the existing technology, a bottom-mounted bridge maintenance vehicle and an installation method thereof are provided, which adopts an installation method from top to bottom on the bridge deck, is easy to install, and a locking mechanism is provided to effectively prevent the bridge maintenance vehicle from shaking and falling when parked, thereby greatly improving the safety of the equipment.

[0005] The technical solution adopted by the present invention is: a bottom-mounted bridge maintenance vehicle, including a track assembly, a traveling gantry and a main body truss, characterized in that: the traveling gantry includes a fixed-end traveling gantry and a movable-end traveling gantry, the fixed-end traveling gantry and the movable-end traveling gantry are installed under the bridge through the track assembly, the fixed-end traveling gantry and the movable-end traveling gantry are both provided with an openable and closable base, the main body truss can be inserted from the base of the fixed-end traveling gantry and the movable-end traveling gantry, after the base is closed, the fixed-end traveling gantry and the movable-end traveling gantry support the main body truss inside; the main body truss is fixedly connected to the fixed-end traveling gantry, and is movably connected in the movable-end traveling gantry, and can slide in the movable-end traveling gantry; the fixed-end traveling gantry and the movable-end traveling gantry are both provided with a locking mechanism for preventing the maintenance vehicle from shaking and falling, and the movable-end traveling gantry is also provided with a sliding guide mechanism for facilitating the movement of the main body truss.

[0006] According to the above technical scheme, the fixed-end traveling gantry and the movable-end traveling gantry both include two running trolleys suspended on a track, a door frame hinged to the bottom of the two running trolleys, and a base installed at the bottom of the door frame; the door frames of the fixed-end traveling gantry and the movable-end traveling gantry can be inserted into the base and form an openable and closable hinged connection structure through the base connecting axis; the fixed-end traveling gantry is provided with a shock-absorbing part on the inner side of the door frame, which can reduce the friction and collision with the main truss; the sliding guide mechanism includes a sliding part arranged on the side of the door frame and a guide part on the side of the base.

[0007] According to the above technical solution, the sliding member includes a sliding wheel frame fixed on the side of the door frame, a sliding wheel axle passing through the sliding wheel frame, and a sliding wheel rotatably mounted on the sliding wheel axle; the guide member is installed on the roller connecting seat of the base, including a roller frame, a roller axle passing through the roller frame, and a roller rotatably mounted on the roller axle; the main truss is placed on the roller, the upper part of which is in contact with the sliding wheel and can slide in the movable end traveling door frame.

[0008] According to the above technical solution, the locking mechanism adopts a double locking combination action form, including a first locking mechanism and a second locking mechanism. The first locking mechanism connects the track and the crossbeam of the traveling gantry; the second locking mechanism passes through the crossbeam of the traveling gantry from bottom to top, and the top is against the track.

[0009] According to the above technical scheme, the first locking mechanism includes a left rail clamp, a right rail clamp, an adjusting clamping mechanism and a guide member, the upper parts of the left rail clamp and the right rail clamp are used to clamp the rail, and the lower parts are respectively located on both sides of the crossbeam; the adjusting clamping mechanism passes through the left rail clamp and the right rail clamp from under the crossbeam, and is used to adjust the positions of the left and right rail clamps so that they clamp the rail; the guide member passes through the left rail clamp and the right rail clamp from above the crossbeam, and guides the movement of the left and right rail clamps.

[0010] According to the above technical solution, the second locking mechanism includes a screw, a sliding shoe and a limit nut. The screw passes through the cross beam from bottom to top, is connected to the limit nut fixed above the cross beam through a screw nut pair, and is locked by a locking mechanism. The top end of the screw is movably connected to the sliding shoe to form an adaptive angle adjustment mechanism, so that the screw can rotate in the sliding shoe to achieve adaptive angle adjustment.

[0011] According to the above technical solution, the main truss is also provided with a ladder, a mobile operating platform, a driving mechanism and an electrical unit. The driving mechanism includes a power supply, a frequency conversion motor and a reducer. The frequency conversion motor and the reducer are arranged on the running trolley of the fixed-end walking gantry and the movable-end walking gantry. The electrical unit can control the speed of the frequency conversion motor to keep the walking of the fixed-end walking gantry and the movable-end walking gantry synchronized.

[0012] According to the above technical solution, the power source is a lithium battery and the main truss is made of aluminum alloy material.

[0013] According to the above technical solution, the installation method of the under-hung bridge maintenance vehicle described in the present invention has the following specific installation steps:

[0014] Step 1: Install track supports on the left and right sides of the bridge bottom respectively, and set tracks under the track supports;

[0015] Step 2: Install the fixed end traveling gantry and the movable end traveling gantry on two tracks respectively. At this time, the bases of the fixed end traveling gantry and the movable end traveling gantry are both in the open state. The main truss is symmetrically divided into a left half truss and a right half truss. The mobile crane on the left lifts the left half truss, descends from the gap in the middle of the bridge span to under the bridge deck, and then moves horizontally to the bottom of the fixed end traveling gantry, and rises to the inside of the fixed end traveling gantry through the opened fixed end traveling gantry base. The mobile crane on the right installs the right half truss to the inside of the movable end traveling gantry in the same way. After the left and right trusses are docked, they are fixedly connected as one, and the bases of the fixed end traveling gantry and the movable end traveling gantry are closed.

[0016] Step 3: Hoist the ladder to the edge of the main truss, install the drive mechanism, mobile operating platform and electrical unit, and debug the equipment to complete the entire installation process of the bridge maintenance vehicle.

[0017] The beneficial effects achieved by the present invention are:

[0018] 1. The fixed end traveling gantry and the movable end traveling gantry of the bridge maintenance vehicle of the present invention are both provided with an openable base. During installation, the main truss is lifted by a crane above the bridge, and the gantry is entered through the opened base of the fixed end traveling gantry and the movable end traveling gantry. This top-down installation method not only simplifies the installation process of the bridge maintenance vehicle and avoids the trouble of setting up the bracket, but also enables simultaneous construction and equipment installation during the maintenance and renovation of existing old bridges, thereby improving construction efficiency. The maintenance vehicle is also provided with a locking mechanism, which can effectively prevent the bridge maintenance vehicle from shaking and falling when parked, greatly improving the safety of the equipment.

[0019] 2. The locking mechanism of the bridge maintenance vehicle adopts a double locking combination, including the first locking mechanism and the second locking mechanism. The first locking mechanism connects the track and the crossbeam of the traveling gantry, which can fix the traveling gantry to prevent the maintenance vehicle from shaking and falling. The second locking mechanism passes through the crossbeam of the traveling gantry from bottom to top, and the top is against the track, which performs a secondary locking on the maintenance vehicle and can effectively prevent the maintenance vehicle from shaking relative to the track. The combination of the two enhances the stability and reliability of the locking and greatly improves the safety of the bridge maintenance vehicle.

[0020] 3. Aluminum alloy is used to replace the plain carbon steel used in the main truss of traditional bridge maintenance vehicles. Under the premise of ensuring the strength and safety of the maintenance vehicle, the load on the bridge is reduced. Aluminum alloy also has excellent anti-corrosion performance, avoiding the pollution of the air caused by on-site anti-corrosion coating. Lithium batteries are used as power sources to replace traditional gasoline and diesel generators, providing clean power for working devices such as traveling gantry, solving the problem of high noise and harmful gas emissions from gasoline and diesel generators. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A front view of the overall structure of an under-hung bridge maintenance vehicle provided by an embodiment of the present invention;

[0022] Figure 2 A top view of the overall structure of an under-hung bridge maintenance vehicle provided by an embodiment of the present invention;

[0023] Figure 3 A front view of a fixed-end traveling gantry of a bottom-hung bridge maintenance vehicle provided in an embodiment of the present invention;

[0024] Figure 4 A side view of a fixed-end traveling gantry of a bottom-hung bridge maintenance vehicle provided in an embodiment of the present invention;

[0025] Figure 5 A front view of a movable end traveling gantry of a bottom-hung bridge maintenance vehicle provided by an embodiment of the present invention;

[0026] Figure 6 A side view of a movable end traveling gantry of a bottom-hung bridge maintenance vehicle provided by an embodiment of the present invention;

[0027] Figure 7 A schematic diagram of a door frame structure of an under-hung bridge maintenance vehicle provided in an embodiment of the present invention;

[0028] Figure 8 A schematic diagram of the base structure of an undercarriage-type bridge maintenance vehicle provided in an embodiment of the present invention;

[0029] Fig. 9 A schematic diagram of the structure of sliding parts of a movable end traveling gantry of a bottom-hung bridge maintenance vehicle provided by an embodiment of the present invention;

[0030] Fig.10 A schematic diagram of the guide structure of a movable end traveling gantry of a bottom-mounted bridge maintenance vehicle provided by an embodiment of the present invention;

[0031] Fig.11 A schematic diagram of the structure of a first locking mechanism of an undercarriage bridge maintenance vehicle provided by an embodiment of the present invention;

[0032] Fig.12A schematic diagram of the structure of a second locking mechanism of an under-hung bridge maintenance vehicle provided by an embodiment of the present invention;

[0033] Fig.13 A schematic diagram of a screw structure in a second locking mechanism of an under-hung bridge maintenance vehicle provided by an embodiment of the present invention;

[0034] Fig.14 A schematic diagram of the function of a stop screw in a second locking mechanism of an under-hung bridge maintenance vehicle provided by an embodiment of the present invention;

[0035] Fig.15 A schematic diagram of the installation of a track assembly in a method for installing a bottom-mounted bridge maintenance vehicle provided by an embodiment of the present invention;

[0036] Fig.16 A schematic diagram of the installation of a fixed-end traveling gantry and a movable-end traveling gantry in a method for installing a bottom-mounted bridge maintenance vehicle provided by an embodiment of the present invention;

[0037] Fig.17 A schematic diagram of the hoisting of the left half truss in a method for installing a bottom-mounted bridge maintenance vehicle provided by an embodiment of the present invention;

[0038] Fig.18 A schematic diagram of the movement of the left half truss in a method for installing a bottom-mounted bridge maintenance vehicle provided by an embodiment of the present invention;

[0039] Fig.19 A schematic diagram of the installation of the left half truss and the fixed end traveling gantry in a method for installing a bottom-mounted bridge maintenance vehicle provided by an embodiment of the present invention;

[0040] Fig. 20 A schematic diagram of the installation of the right half truss in a method for installing a bottom-mounted bridge maintenance vehicle provided by an embodiment of the present invention;

[0041] Fig.21 A schematic diagram showing the completion of the installation of a main truss in a method for installing a bottom-mounted bridge maintenance vehicle provided by an embodiment of the present invention;

[0042] Fig. 22 A schematic diagram of the installation of other components on the main truss in a method for installing a bottom-mounted bridge maintenance vehicle provided in an embodiment of the present invention.

[0043] In the figure: 1. Track assembly; 1-1. Track support; 1-2. I-beam track; 2. Fixed end traveling gantry; 2-1. Traveling trolley; 2-2. Door frame; 2-3. Base; 2-4. Third hand wheel; 2-5. Door frame crossbeam; 2-6. Door frame column; 2-7. Strengthening plate rib; 2-8. Connecting shaft; 2-9. Asbestos pad; 2-10. Fixed seat; 2-11. Supporting wheel connecting seat; 2-12. Door frame connecting seat; 3. Moving end traveling gantry; 3-1. Sliding member; 3-2. Guide member; 3-3. Sliding wheel frame; 3-4. Sliding wheel shaft; 3-5. Sliding wheel; 3-6. Sliding sleeve; 3-7. Supporting wheel frame; 3-8. Supporting wheel shaft; 3-9. Supporting wheel; 4. Main truss; 4-1. Intermediate section; 4-2. Side segment; 5, first locking mechanism; 5-1, left rail clamp; 5-2, right rail clamp; 5-3, guide shaft; 5-4, adjusting screw; 5-5, first hand wheel; 5-6, clamping pad; 5-7, limit seat; 5-8, through-hole guide sleeve; 5-9, threaded guide sleeve; 5-10, locking nut; 6, second locking mechanism; 6-1, screw; 6-2, sliding shoe; 6-3, limit nut; 6-4, stop seat; 6-5, second hand wheel; 6-6, brake friction block; 6-7, limit cover plate; 6-8, stop screw; 6-9, threaded segment; 6-10, trapezoidal tooth segment; 7-1, power supply; 7-2, variable frequency motor; 7-3, reducer; 8, electrical unit; 9, ladder; 10, mobile operating platform. DETAILED DESCRIPTION

[0044] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0045] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, or are directions or positional relationships in which the product of the application is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0046] like Figure 1 , Figure 2 As shown, the present invention discloses a bottom-hung bridge maintenance vehicle.

[0047] It includes a track assembly 1, a traveling gantry and a main body truss 4, the traveling gantry includes a fixed-end traveling gantry 2 and a movable-end traveling gantry 3, the fixed-end traveling gantry 2 and the movable-end traveling gantry 3 are installed under the bridge through the track assembly 1, the fixed-end traveling gantry 2 and the movable-end traveling gantry 3 are both provided with an openable and closable base 2-3, the main body truss 4 can be inserted from the base 2-3 of the fixed-end traveling gantry 2 and the movable-end traveling gantry 3, after the base 2-3 is closed, the fixed-end traveling gantry 2 and the movable-end traveling gantry 3 support the main body truss 4 inside; the main body truss 4 is fixedly connected to the fixed-end traveling gantry 2, and is movably connected inside the movable-end traveling gantry 3, and can slide inside the movable-end traveling gantry 3; the fixed-end traveling gantry 2 and the movable-end traveling gantry 3 are both provided with a locking mechanism for preventing the maintenance vehicle from shaking and falling, and the movable-end traveling gantry 3 is also provided with a sliding guide mechanism for facilitating the movement of the main body truss 4. The bridge maintenance vehicle of the present invention adopts a top-down installation method, which reduces the difficulty of installation. At the same time, a locking mechanism of a double locking form is adopted to prevent the bridge maintenance vehicle from shaking and falling when parking, thereby greatly improving the safety of the equipment.

[0048] In this embodiment, the track assembly 1 includes a track support 1-1 and an I-beam track 1-2. The track support 1-1 is fixed under the bridge by welding, and the I-beam track 1-2 is bolted to the track support 1-1. The main truss 4 includes an intermediate segment 4-1 and two side segments 4-2. The intermediate segment 4-1 and the two side segments 4-2 are connected as a whole by bolts at the joint. The two side segments 4-2 are respectively mounted on the fixed end traveling gantry 2 and the movable end traveling gantry 3. The main truss 4 uses high-strength aluminum alloy 6061-T6 instead of traditional plain carbon steel, which significantly reduces the weight of the bridge maintenance vehicle while ensuring strength. The aluminum alloy itself has excellent anti-corrosion properties, and there is no need to spray anti-corrosion materials, which reduces pollution to the environment.

[0049] In this embodiment, Figure 3-8 As shown, the fixed end traveling gantry 2 and the movable end traveling gantry 3 both include two running trolleys 2-1 suspended on the I-beam rail 1-2, a door frame 2-2 hinged to the bottom of the two running trolleys 2-1, and a base 2-3 installed at the bottom of the door frame 2-2. The two running wheels of the running trolleys 2-1 are located in the two grooves of the I-beam rail 1-2. The running trolleys 2-1 can be controlled by the third hand wheel 2-4 to clamp or release the I-beam rail 1-2. The bottom of the door frame 2-2 of the fixed end traveling gantry 2 and the movable end traveling gantry 3 is provided with a reinforcing plate rib 2-7. The door frame column 2-6 can be inserted into the door frame connecting seat 2-12 on the base 2-3, and then four connecting shafts 2-8 are inserted to form an articulated connection. When the two connecting shafts 2-8 on the same side of the base 2-3 are taken out, the base 2-3 can rotate around the remaining two connecting shafts 2-8 to realize the opening and closing of the base 2-3.

[0050] In this embodiment, Figure 3 As shown, the fixed-end traveling gantry 2 is also provided with a shock-absorbing component on the inner side of the door frame 2-2. The shock-absorbing component is an asbestos pad 2-9, which has good impact resistance and shock absorption effects, and can effectively reduce the friction and collision between the main truss 4 and the door frame 2-2; a fixed seat 2-10 is provided at the bottom of the main truss 4, and the fixed seat 2-10 is fastened to the base 2-3 of the fixed-end traveling gantry 2 by bolts, so as to prevent the main truss 4 from rubbing and colliding with the fixed-end traveling gantry 2 during walking.

[0051] In this embodiment, Figure 5 , 9 As shown in Figures 10, the sliding guide mechanism includes a sliding member 3-1 disposed on the side of the door frame 2-2 and a guide member 3-2 on the side of the base 2-3. The sliding member 3-1 is provided with four pieces and fixed on the side of the door frame column 2-6, including a sliding wheel frame 3-3, a sliding wheel shaft 3-4 and a sliding wheel 3-5 rotatably sleeved on the sliding wheel shaft 3-4, and a sliding sleeve 3-6 is provided between the sliding wheel shaft 3-4 and the sliding wheel 3-5. The sliding member 3-1 can facilitate the main truss 4 to slide in the movable end traveling door frame 3; the guide member 3-2 is provided with four pieces and installed on the supporting wheel connecting seat 2-11 on the side of the base 2-3. The guide member 3-2 includes a supporting wheel The frame 3-7, the supporting roller shaft 3-8 and the supporting roller 3-9 rotatably mounted on the supporting roller shaft 3-8, the supporting roller shaft 3-8 and the supporting roller 3-9 are directly provided with a sliding sleeve 3-6, the supporting roller 3-9 is T-shaped, and the main truss 4 is placed on the supporting roller. The annular flange of the T-shaped supporting roller 3-9 can limit and guide the main truss 4. In the case of deviation in the gauge of the I-beam track 1-2, the main truss 4 is allowed to move on the movable end traveling gantry 3, thereby effectively eliminating the influence of the gauge deviation on the operation of the equipment.

[0052] In this embodiment, Figure 3 , Figure 5 As shown, the locking mechanism adopts a double locking combined action form, including a first locking mechanism 5 and a second locking mechanism 6. The first locking mechanism 5 connects the I-beam rail 1-2 and the door frame crossbeam 2-5 of the traveling gantry, and can fix the traveling gantry to prevent the maintenance vehicle from shaking and falling. The second locking mechanism 6 passes through the door frame crossbeam 2-5 of the traveling gantry from bottom to top, and the top is against the I-beam rail 1-2, and the maintenance vehicle is locked twice, which can effectively prevent the maintenance vehicle from shaking relative to the I-beam rail 1-2. The combined action of the two enhances the stability and reliability of the locking, and greatly improves the safety of the bridge maintenance vehicle.

[0053] In this embodiment, Fig.11As shown, the first locking mechanism 5 includes a left rail clamp 5-1, a right rail clamp 5-2, an adjustment clamping mechanism and a guide shaft 5-3. The upper parts of the left rail clamp 5-1 and the right rail clamp 5-2 are located in the two grooves of the I-beam track 1-2 for clamping the I-beam track 1-2, and the lower parts are located on both sides of the door frame cross beam 2-5 respectively. The left rail clamp 5-1 and the right rail clamp 5-2 are both fixed with clamping pads 5-6 at the clamp ends by bolts; the adjustment clamping mechanism passes through the left rail clamp 5-1 and the right rail clamp 5-2 from below the door frame cross beam 2-5, and is used to adjust the positions of the left and right rail clamps (5-1, 5-2) so that they clamp the I-beam track 1-2; the guide shaft 5-3 passes through the left rail clamp 5-1 and the right rail clamp 5-2 from above the door frame cross beam 2-5, and plays a guiding role in the movement of the left and right rail clamps (5-1, 5-2).

[0054] In this embodiment, the adjusting clamping mechanism includes an adjusting screw rod 5-4, and threaded guide sleeves 5-9 are fixed on the left rail clamp 5-1 and the right rail clamp 5-2 by welding. The two ends of the adjusting screw rod 5-4 can rotate independently and are respectively sleeved in the threaded guide sleeves 5-9 on the left and right rail clamps (5-1, 5-2); the adjusting screw rod 5-4 is manually driven, and is respectively connected to the first hand wheel 5-5 at both ends; the guide shaft 5-3 is movably sleeved in the through hole guide sleeve 5-8, and the through hole guide sleeve 5-8 is fixed on the left rail clamp 5-1 and the right rail clamp 5-2 by welding; the guide shaft 5-3 and the adjusting screw rod 5-4 pass through the left and right rail clamps (5-1, 5-2) above and below the door frame cross beam 2-5, respectively, and the guide shaft 5-3 and the adjusting screw rod 5 -4 are respectively sleeved with two limit seats 5-7, and the guide shaft 5-3 and the adjusting screw rod 5-4 are provided with annular bosses between the two limit seats 5-7. The diameter of the bosses is larger than the inner diameter of the limit seat 5-7 to prevent the guide shaft 5-3 and the adjusting screw rod 5-4 from sliding out along the axial direction. The limit seat 5-7 is fixedly connected to the door frame crossbeam 2-5 by bolts; two locking nuts 5-10 are also provided on the adjusting screw rod 5-4 on the outer sides of the left and right rail clamps 5-25-1. When the first hand wheel 5-5 is rotated to make the rail clamp 5-1 clamp the I-beam track 1-2, the two locking nuts 5-10 are tightened to make the locking nuts stick to the rail clamp 5-1. At this time, the first hand wheel 5-5 cannot be rotated in the opposite direction to open the rail clamp 5-1, which plays a role in locking protection and preventing misoperation of the first locking mechanism 5.

[0055] In this embodiment, Figure 12-14As shown, the second locking mechanism 6 includes a screw rod 6-1, a sliding shoe 6-2 and a limit nut 6-3. The screw rod 6-1 passes through the door frame cross beam 2-5 of the traveling door frame from bottom to top, and is connected to the limit nut 6-3 fixed above the door frame cross beam 2-5 through a screw nut pair, and is locked by a locking mechanism. The top end of the screw rod 6-1 is movably connected with the sliding shoe 6-2 to form an adaptive angle adjustment mechanism, so that the screw rod 6-1 can rotate in the sliding shoe 6-2 to achieve adaptive angle adjustment.

[0056] In this embodiment, the top of the screw rod 6-1 is convex spherical, the top of the sliding shoe 6-2 is flat, and the bottom is provided with a groove adapted to the convex ball at the top of the screw rod 6-1; the convex spherical top of the screw rod 6-1 and the sliding shoe 6-2 together constitute an adaptive angle adjustment mechanism, and the screw rod 6-1 can rotate in the sliding shoe 6-2 to achieve adaptive angle adjustment, ensuring that when the screw rod 6-1 is not perpendicular to the I-beam rail 1-2, the top of the sliding shoe 6-2 can also be close to the bottom of the I-beam rail 1-2; a limiting cover plate 6-7 is bolted to the lower opening of the sliding shoe 6-2 to prevent the screw rod 6-1 from sliding out, and a braking friction block 6-6 is bolted to the top of the sliding shoe 6-2; a limiting nut 6-3 engaged with the threaded section 6-9 of the screw rod 6-1 is bolted above the door frame cross beam 2-5, and a locking nut 6-3 is welded below the door frame cross beam 2-5 and is sleeved on the screw rod 6- The stop seat 6-4 outside the trapezoidal toothed section 6-10 is provided with a second hand wheel 6-5 at the lower end of the screw rod 6-1. The screw rod 6-1 can be controlled to move upward by turning the second hand wheel 6-5. The brake friction block 6-6 on the top of the sliding shoe 6-2 is pressed against the I-beam track 1-2 to prevent the fixed end traveling gantry 2 and the movable section traveling gantry from shaking. The stop seat 6-4 is provided with a stop screw 6-8 which can be inserted into the groove of the trapezoidal toothed section 6-10 of the screw rod 6-1. When the second hand wheel 6-5 is turned to make the second locking mechanism 6 press upward against the I-beam track 1-2, the stop screw 6-8 on the stop seat 6-4 is tightened, and the stop screw 6-8 is inserted into the groove of the trapezoidal toothed section 6-10 of the screw rod 6-1. At this time, the second hand wheel 6-5 cannot control the screw rod 6-1 to rotate, so as to prevent the second locking mechanism 6 from loosening.

[0057] In this embodiment, the bridge maintenance vehicle also includes a ladder 9, a mobile operating platform 10, a driving mechanism, a power supply 7-1 and an electrical unit 8. The ladder 9 is arranged on one side of the main truss and is connected to the upper surface of the bridge. A mobile operating platform 10 is also provided on the main truss. The lower part of the mobile operating platform 10 adopts a hydraulic lifting frame, and a pulley is installed at the bottom. It can move on the main truss 4 to achieve all-round inspection of the bottom, flanks and other areas of the bridge; the driving mechanism includes a variable frequency motor 7-2 and a reducer 7-3. The variable frequency motor 7-2 is installed on the running trolley 2-1 of the fixed end running gantry 2 and the movable end running gantry 3. The reducer 7-3 can increase the torque output by reducing the speed of the variable frequency motor 7-2; the power supply 7-1 adopts a lithium battery instead of traditional gasoline and diesel generators, which reduces noise and air pollution; the electrical unit 8 can control the speed of the variable frequency motor 7-2 to keep the fixed end running gantry 2 and the movable end running gantry 3 running synchronously to prevent the bridge maintenance vehicle from derailing.

[0058] like Figure 15-22 As shown, this embodiment also provides an installation method of the bridge maintenance vehicle, and the specific steps are as follows:

[0059] Step 1: Install track supports 1-1 on the left and right sides of the bridge bottom respectively, and set tracks under the track supports 1-1;

[0060] Step 2: install the fixed end traveling gantry 2 and the movable end traveling gantry 3 on two tracks respectively. At this time, the bases 2-3 of the fixed end traveling gantry 2 and the movable end traveling gantry 3 are both in the open state, and the main truss 4 is symmetrically divided into a left half truss and a right half truss. The mobile crane on the left lifts the left half truss, descends from the gap in the middle of the bridge span to under the bridge deck, and then moves horizontally to the bottom of the fixed end traveling gantry 2, and rises to the inside of the fixed end traveling gantry 2 through the opened base 2-3 of the fixed end traveling gantry 2. The mobile crane on the right installs the right half truss to the inside of the movable end traveling gantry 3 in the same way. After the left and right trusses are butt-jointed, they are fixedly connected as one, and the bases 2-3 of the fixed end traveling gantry 2 and the movable end traveling gantry 3 are closed.

[0061] Step 3: hoist the ladder 9 on the edge of the main truss 4, install the power supply 7-1, the mobile operating platform 10 and the electrical unit 8, and debug the equipment to complete the entire installation process of the bridge maintenance vehicle.

Claims

1. A bottom-mounted bridge maintenance vehicle, comprising a track assembly, a traveling gantry and a main truss, characterized in that: The traveling gantry comprises a fixed-end traveling gantry and a movable-end traveling gantry, and the fixed-end traveling gantry and the movable-end traveling gantry are installed under the bridge through a track assembly, and the fixed-end traveling gantry and the movable-end traveling gantry are both provided with an openable and closable base, and the main body truss can be inserted from the bases of the fixed-end traveling gantry and the movable-end traveling gantry, and after the base is closed, the fixed-end traveling gantry and the movable-end traveling gantry support the main body truss inside; the main body truss is fixedly connected to the fixed-end traveling gantry, and is movably connected inside the movable-end traveling gantry, and can slide inside the movable-end traveling gantry; the fixed-end traveling gantry and the movable-end traveling gantry are both provided with a locking mechanism for preventing the maintenance vehicle from shaking and falling, and the movable-end traveling gantry is also provided with a sliding guide mechanism for facilitating the movement of the main body truss.

2. The undercarriage bridge maintenance vehicle according to claim 1 is characterized in that: The fixed-end traveling gantry and the movable-end traveling gantry both comprise two running trolleys suspended on a track, a door frame hinged to the bottom of the two running trolleys, and a base installed at the bottom of the door frame; the door frames of the fixed-end traveling gantry and the movable-end traveling gantry can be inserted into the base and form an openable and closable hinged connection structure through the base connecting axis; the fixed-end traveling gantry is provided with a shock-absorbing part on the inner side of the door frame, which can reduce the friction and collision with the main truss; the sliding guide mechanism comprises a sliding part arranged on the side of the door frame and a guide part on the side of the base.

3. The undercarriage bridge maintenance vehicle according to claim 1 or 2, characterized in that: The sliding member includes a sliding wheel frame fixed on the side of the door frame, a sliding wheel axle passing through the sliding wheel frame, and a sliding wheel rotatably mounted on the sliding wheel axle; the guide member is installed on the roller connecting seat of the base, including a roller frame, a roller axle passing through the roller frame, and a roller rotatably mounted on the roller axle; the main truss is placed on the roller, the upper part of which is in contact with the sliding wheel and can slide in the movable end traveling door frame.

4. A beam maintenance vehicle according to claim 1, characterized in that: The locking mechanism adopts a double locking combination action form, including a first locking mechanism and a second locking mechanism, the first locking mechanism connecting the track and the crossbeam of the traveling gantry; The second locking mechanism passes through the crossbeam of the traveling door frame from bottom to top, and the top thereof abuts against the track.

5. The undercarriage bridge maintenance vehicle according to claim 4 is characterized in that: The first locking mechanism includes a left rail clamp, a right rail clamp, an adjusting clamping mechanism and a guide shaft. The upper parts of the left rail clamp and the right rail clamp are used to clamp the rails, and the lower parts are respectively located on both sides of the crossbeam; the adjusting clamping mechanism passes through the left rail clamp and the right rail clamp from under the crossbeam, and is used to adjust the positions of the left and right rail clamps to clamp the rails; the guide shaft passes through the left rail clamp and the right rail clamp from above the crossbeam, and guides the movement of the left and right rail clamps.

6. The undercarriage bridge maintenance vehicle according to claim 4 is characterized in that: The second locking mechanism includes a screw, a sliding shoe and a limit nut. The screw passes through the cross beam from bottom to top, is connected to the limit nut fixed above the cross beam through a screw nut pair, and is locked by a locking mechanism. The top end of the screw is movably connected to the sliding shoe to form an adaptive angle adjustment mechanism, so that the screw can rotate in the sliding shoe to achieve adaptive angle adjustment.

7. The undercarriage bridge maintenance vehicle according to claim 1 is characterized in that: The main truss is also provided with a ladder, a mobile operating platform, a driving mechanism and an electrical unit. The driving mechanism includes a power supply, a frequency conversion motor and a reducer. The frequency conversion motor and the reducer are arranged on the running trolleys of the fixed-end walking gantry and the movable-end walking gantry. The electrical unit can control the rotation speed of the frequency conversion motor to keep the walking of the fixed-end walking gantry and the movable-end walking gantry synchronized.

8. The undercarriage bridge maintenance vehicle according to claim 7 is characterized in that: The power source is a lithium battery, and the main truss is made of aluminum alloy material.

9. A method for installing an undercarriage bridge maintenance vehicle according to any one of claims 1 to 8, characterized in that: The specific installation steps are as follows: Step 1: Install track supports on the left and right sides of the bridge bottom respectively, and set tracks under the track supports; Step 2: Install the fixed end traveling gantry and the movable end traveling gantry on two tracks respectively. At this time, the bases of the fixed end traveling gantry and the movable end traveling gantry are both in the open state. The main truss is symmetrically divided into a left half truss and a right half truss. The mobile crane on the left lifts the left half truss, descends from the gap in the middle of the bridge span to under the bridge deck, and then moves horizontally to the bottom of the fixed end traveling gantry, and rises to the inside of the fixed end traveling gantry through the opened fixed end traveling gantry base. The mobile crane on the right installs the right half truss to the inside of the movable end traveling gantry in the same way. After the left and right trusses are docked, they are fixedly connected as one, and the bases of the fixed end traveling gantry and the movable end traveling gantry are closed. Step 3: Hoist the ladder to the edge of the main truss, install the drive mechanism, mobile operating platform and electrical unit, and debug the equipment to complete the entire installation process of the bridge maintenance vehicle.

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