A rear anchorage maintenance gantry vehicle for existing bridges

Abstract

The present invention discloses a rear-anchorage maintenance gantry vehicle for existing bridges, comprising a rear-anchorage system, a track system, a running system, a gantry system, and a truss system. The rear-anchorage system is connected to the main beam of the existing bridge; the track system is located on the lower side of the rear-anchorage system and is connected to the rear-anchorage system; the running system is located on the upper side of the gantry system, connecting the track system and the gantry system, and driving the gantry system to slide on the track system; the gantry system is provided on the lower side of the track system, connecting the running system and the truss system, and driving the truss system to slide on the track system; a pedestrian passage is provided on the truss system, and the truss system passes through and is slidably connected to the gantry system, and moves along the track system following the gantry system. The present invention provides a solution for existing bridges that were not equipped with a maintenance gantry vehicle during construction. It has strong versatility and practicality, is convenient to construct, and can achieve all-round maintenance, inspection, and repair of bridges.

Description

Technical field:

[0001] The invention belongs to the field of bridges and relates to a maintenance gantry vehicle for bridge structures, in particular to a rear-anchoring maintenance gantry vehicle for existing bridges. Background technology:

[0002] In recent decades, my country has built a vast number of bridges of diverse types. However, many large and extra-large bridges were built without supporting maintenance equipment. As bridges age and maintenance concepts evolve, bridge maintenance becomes increasingly important and prominent. These bridges, lacking maintenance equipment, present significant challenges in maintenance and repair.

[0003] For the above bridges, the installation of a maintenance gantry is difficult due to factors such as installation reservation conditions. Currently, there is no mention of a post-anchorage maintenance gantry that can be used for existing bridges. Summary of the invention:

[0004] The present invention provides a rear anchorage maintenance gantry vehicle for an existing bridge, which can be conveniently installed on the existing bridge and has good construction convenience, wide applicability and good economy.

[0005] In order to achieve the above-mentioned object of the invention, the present invention adopts the following technical solutions:

[0006] The present invention provides a rear-anchoring maintenance gantry vehicle for an existing bridge, the rear-anchoring maintenance gantry vehicle comprising a rear anchoring system, a track system, a running system, a gantry system and a truss system; the rear anchoring system is connected to the main beam of the existing bridge and forms an integral body with the main beam; the track system is located at the lower side of the rear anchoring system and is connected to the rear anchoring system; the running system is located at the upper side of the gantry system, connecting the track system and the gantry system, driving the gantry system to slide on the track system, and the longitudinal movement of the running system cooperates with the lateral movement of the truss system in the gantry system to realize the in-plane rotation of the maintenance gantry vehicle, thereby achieving comprehensive coverage of all spaces of the bridge by the maintenance gantry vehicle; the gantry system is arranged at the lower side of the track system, connecting the running system and the truss system, driving the truss system to slide on the track system; a pedestrian passage is provided on the truss system, the truss system passes through and is slidably connected to the gantry system, and follows the gantry system to move along the track system.

[0007] Furthermore, the rear anchoring system includes an anchor plate and anchor bolts or bolts. The anchor plate is connected to the existing bridge main beam through the anchor bolts or bolts to form a whole. The anchor bolts can anchor the anchor plate on the concrete bridge, and the bolts can anchor the anchor plate on the steel structure bridge.

[0008] Furthermore, the track system includes tracks and high-strength bolts, and the tracks are connected to the anchor plates in the rear anchoring system through the bolts.

[0009] Furthermore, the running system includes a drive motor, a hoist running mechanism and a distribution beam. The hoist running mechanism is connected to the track system, and the distribution beam is connected to the gantry system. The drive motor drives the hoist running mechanism and drives the gantry system to move longitudinally along the bridge on the track system, thereby achieving full coverage of the longitudinal space of the bridge.

[0010] Furthermore, the gantry system includes a lower gantry, an upper gantry, a lower supporting wheel, an upper supporting wheel, a lateral guide wheel and a rack; the truss system is supported on the lower gantry and is slidingly connected to the gantry system through the lower supporting wheel, the upper supporting wheel and the lateral guide wheel; the upper gantry is connected to the distribution beam.

[0011] Furthermore, the truss system includes an upper chord, a lower chord, a web, a base plate and a motor reducer, the web connects the upper chord and the lower chord, the base plate is arranged between the lower chord at the bottom of the truss to form a pedestrian passage, and the motor reducer is connected to the rack through a gear to drive the truss system to slide in the gantry system.

[0012] Furthermore, a braking system is provided in the running system, and the braking system is used to brake the running system.

[0013] Furthermore, a bus controller is provided in the running system, and the bus controller controls the movement of the hoist running mechanism in the running system.

[0014] Compared with the prior art, the beneficial effects of the present invention are: First, the rear anchoring maintenance gantry for existing bridges provided by the present invention provides a solution for bridges that were not installed with a maintenance gantry during construction. Second, the rear anchoring maintenance gantry for existing bridges provided by the present invention is highly versatile and applicable to both concrete beams and steel beams. Third, the rear anchoring maintenance gantry for existing bridges provided by the present invention is highly practical: the rear anchoring maintenance gantry provides a beam bottom working platform that can achieve longitudinal and lateral movement and in-plane rotation, and can be used for daily maintenance and inspection as well as component replacement and maintenance. Fourth, the rear anchoring maintenance gantry for existing bridges provided by the present invention is convenient to construct: all components of the rear anchoring maintenance gantry are prefabricated in the factory and only require on-site positioning and installation. Description of the drawings:

[0015] Figure 1 This is a schematic structural diagram of a rear anchorage maintenance gantry vehicle for an existing bridge according to the present invention;

[0016] Figure 2Schematic diagram of the rear anchoring system structure of the embodiment, Figure a is a main view, and Figure b is a left view;

[0017] Figure 3 Schematic diagram of the track system structure of the embodiment, Figure a is a main view, and Figure b is a left view;

[0018] Figure 4 Schematic diagram of the running system structure of the embodiment, Figure a is a main view, and Figure b is a left view;

[0019] Figure 5 Schematic diagram of the distribution beam structure of the embodiment, Figure a is a main view, and Figure b is a top view;

[0020] Figure 6 Schematic diagram of the gantry system structure of the embodiment, Figure a is a main view, Figure b is a top view, and Figure c is a left view;

[0021] Figure 7 Schematic diagram of the truss system structure of the embodiment, Figure a is the main view, Figure b is the top view; Figure c is the left view.

[0022] In the figure: rear anchoring system 1, track system 2, running system 3, gantry system 4, truss system 5; anchor plate 11, anchor bolts or bolts 12; track 21, high-strength bolts 22; drive motor 31, hoist running mechanism 32, distribution beam 33; lower portal frame 41, upper portal frame 42, lower supporting roller 43, upper supporting roller 44, lateral guide wheel 45, rack 46; upper chord 51, lower chord 52, web member 53, bottom plate 54, motor reducer 55. Specific implementation method:

[0023] The technical solution of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, but the protection scope of the present invention is not limited to the following embodiments.

[0024] like Figure 1-Figure 7As shown, this embodiment provides a rear anchorage maintenance gantry vehicle for an existing bridge, comprising: a rear anchorage system 1, a track system 2, a running system 3, a gantry system 4, and a truss system 5; the rear anchorage system 1 comprises an anchor plate 11 and anchor bolts or bolts 12, and the rear anchorage system 1 is connected to the main beam structure of the bridge and forms an integral part with the main beam; the track system 2 comprises a track 21 and bolts 22, and the track system 2 is connected to the lower side of the rear anchorage system 1 along the longitudinal direction of the bridge; the running system 3 is located on the upper side of the gantry system, and comprises a drive motor 31, a hoist running mechanism 32, and a distribution beam 33, the hoist running mechanism 32 is installed on the track system 2, and the distribution beam 33 connects the gantry system 4 and the running system 3, the drive motor 31 drives the running mechanism 32 to drive the distribution beam 33, the gantry system 4, and the truss system 5 to move longitudinally along the bridge through the track system 2, forming a longitudinal bridge-direction moving platform at the bottom of the beam, thereby performing maintenance, inspection, and repair on the beam body in the longitudinal bridge direction; The gantry system 4 includes a lower gantry 41, an upper gantry 42, a lower supporting roller 43, an upper supporting roller 44, a lateral guide wheel 45, and a rack 46; the gantry system 4 is arranged on the lower side of the track system, connecting the running system 3 and the truss system 5, driving the truss system 5 to slide on the track system 2; a pedestrian passage is set on the truss system 5, and the truss system 5 passes through and is slidably connected to the gantry system 4, following the gantry system 4 to move along the track system 2. The truss system 5 comprises an upper chord 51, a lower chord 52, webs 53, a base plate 54, and a motor reducer 55. A pedestrian walkway is provided on the truss system 5, forming a transverse mobile platform at the bottom of the beam, enabling transverse maintenance, inspection, and repair of the beam. The truss system 5 is slidably connected to the gantry system 4 via lower supporting rollers 43, upper supporting rollers 44, and lateral guide wheels 45. The motor reducer 55 and rack 46 are connected via gears, allowing the truss system 5 to slide within the gantry system 4 under the drive of the motor reducer 55. The rear anchorage maintenance gantry vehicle rotates within the gantry vehicle plane through the longitudinal drive of the two traveling systems 3 and the transverse drive of the two gantry systems 4, completing comprehensive inspection of the longitudinal, transverse, and diagonal sections of the beam bottom.

[0025] This embodiment relies on a project to add a rear anchorage maintenance trolley to an existing cable-stayed bridge. The specific parameters of the trolley are shown in the following table:

[0026]

[0027] See also Figure 2 As shown, the rear anchoring system 1 includes an anchor plate 11 and anchor bolts or bolts 12. The anchor plate 11 is made of Q420qNHD weather-resistant steel and is prefabricated in the factory. The anchor plate 11 is anchored to the concrete structure or steel structure of the bridge through the stainless steel anchor bolts or bolts 12, forming an anchoring point for the track system 2 along the longitudinal direction of the bridge.

[0028] See also Figure 3 As shown, the track system 2 includes a track 21 and high-strength bolts 22. The track 21 is made of I-beam rolled from Q420qNHD weathering steel and is reliably connected to the anchor plate 11 in the rear anchoring system 1 through the high-strength bolts 22 to form a track along the longitudinal direction of the bridge.

[0029] like Figure 4 and Figure 5 As shown, the running system 3 includes a drive motor 31, a hoist running mechanism 32 and a distribution beam 33. The hoist running mechanism 32 is installed on the lower flange of the I-beam of the track system 2. The distribution beam 33 connects the running system 3 and the gantry system 4. The drive motor 31 drives the hoist running mechanism 32 and drives the gantry system 4 to move longitudinally along the longitudinal track system 2 of the bridge, thereby realizing comprehensive coverage of the beam body by the maintenance gantry vehicle along the longitudinal direction of the bridge.

[0030] See also Figure 6 As shown, the gantry system 4 is constructed of Q420qNHD weathering steel and includes a lower gantry 41, an upper gantry 42, lower supporting rollers 43, upper supporting rollers 44, lateral guide wheels 45, and a rack 46. The truss system 5 is supported on the lower gantry 41 and slidably connected to the gantry system 4 via the lower supporting rollers 43, upper supporting rollers 44, and lateral guide wheels 45. The upper gantry 42 is connected to the distribution beam 33. The motor reducer 55 of the truss system 5 is connected to the rack 46 via a gear. Driven by the motor reducer, the truss system 5 slides relative to the gantry system 4. This, in conjunction with the movement of the running systems 3 on both sides in a direction perpendicular to the gantry system 4, enables the truss system 5 to rotate parallel to the plane of the bridge, achieving full coverage of the diagonal portion of the beam.

[0031] See also Figure 7 As shown, the truss system 5 serves as a working platform, primarily bearing its own weight, loads for operators, and inspection and maintenance tools. The truss is manufactured in five sections at the factory and assembled into a single unit after transport to the site. It is constructed of 6061-T6 aluminum alloy to minimize the truss's own weight. The truss utilizes a variable-height truss, with a truss length and width of 28,930 mm, the same as the bridge's width. The truss is 900 mm high at the fulcrum where it connects to the gantry system 4, 1,350 mm high at mid-span, and 1,500 mm wide. The truss system 5 comprises an upper chord 51, a lower chord 52, web members 53, a base plate 54, and a motor reducer 55. The motor reducer 55 is connected to the rack 46 via a gear, driving the truss system to slide within the gantry system. The upper chord 51, lower chord 52, and web members 53 are bolted together. The bottom plate 54 is made of embossed aluminum alloy plate and is laid between the lower chords 52 at the bottom of the truss to form a pedestrian passage, which is convenient for workers to pass through and carry out inspection, maintenance and other operations. It can prevent slipping and improve the overall stability of the truss.

[0032] A bus controller is provided in the running system 3, and the bus controller controls the movement of the hoist running mechanism 32 in the running system 3. A braking system is also provided in the running system 3, and the braking system is used to brake the running system.

[0033] The maintenance gantry crane has two braking modes: motor braking and manual braking. When braking is required, the gantry crane will prioritize the motor self-locking device for travel braking. If the motor braking fails, manual braking can also be used.

[0034] Motor braking principle: The motor that drives the vehicle has a built-in braking device, which automatically brakes when the motor is powered off.

[0035] Manual braking principle: Turn the handwheel to push the friction disc through the screw, so that the friction disc presses the bottom surface of the track, and friction braking is formed between the brake pad of the friction disc and the bottom surface of the track.

[0036] When the maintenance gantry truck is not in operation, it is parked near the bridge pier. The above two braking methods are all in the braking state, and a steel chain is used to connect and fix the maintenance gantry truck to the anchor point on the bridge pier to prevent accidental slipping when it is parked for a long time without operation.

[0037] Although the present invention has been described in detail through the above embodiments, it should be appreciated that the above description is not intended to limit the present invention. After reading the above description, various modifications and substitutions of the present invention will become apparent to those skilled in the art. Therefore, the scope of protection of the present invention should be defined by the appended claims.

Claims

1. A rear anchorage maintenance gantry vehicle for existing bridges, characterized in that: The rear anchorage maintenance gantry vehicle comprises: a rear anchorage system (1), a track system (2), a running system (3), a gantry system (4) and a truss system (5); the rear anchorage system (1) is connected to the existing bridge main beam; the track system (2) is located at the lower side of the rear anchorage system (1) and is connected to the rear anchorage system (1); the running system (3) is located at the upper side of the gantry system (4), connects the track system (2) and the gantry system (4), and drives the gantry system (4) to slide on the track system (2); the gantry system (4) is arranged at the lower side of the track system (2), connects the running system (3) and the truss system (5), and drives the truss system (5) to slide on the track system (2); A pedestrian passage is provided on the truss system (5), and the truss system (5) passes through and is slidably connected to the gantry system (4), and moves along the track system (2) following the gantry system (4); the rear anchoring system (1) includes an anchor plate (11) and an anchor bolt or bolt (12), and the anchor plate is connected to the existing bridge main beam through the anchor bolt or bolt to form a whole, and the anchor bolt anchors the anchor plate to the concrete bridge or the steel structure bridge; the running system (3) includes a driving motor (31), a hoist running mechanism (32) and a distribution beam (33), the hoist running mechanism (32) is connected to the track system (2), and the distribution beam (33) is connected to the gantry system (4), and the driving motor (31) drives the hoist running mechanism (32) and drives the gantry system (4) to move longitudinally along the bridge on the track system (2); the gantry system (4) includes a lower gantry (41), an upper gantry (42), a lower supporting wheel (43), an upper supporting wheel (44), a lateral guide wheel (45) and a rack (46); the truss system (5) is supported on the lower gantry (41) and is slidably connected to the gantry system (4) through the lower supporting wheel (43), the upper supporting wheel (44) and the lateral guide wheel (45); the upper gantry (42) is connected to the distribution beam (33); the truss system (5) includes an upper chord (51), a lower chord (52), a web (53), a bottom plate (54) and a motor reducer (55); the web (53) connects the upper chord (51) and the lower chord (52); the bottom plate (54) is arranged between the lower chord (52) at the bottom of the truss to form a pedestrian passage; the motor reducer (55) is connected to the rack (46) through a gear to drive the truss system to slide in the gantry system.

2. The rear anchorage maintenance gantry vehicle for existing bridges according to claim 1, characterized in that: The track system (2) comprises a track (21) and high-strength bolts (22), and the track (21) is connected to the anchor plate (11) in the rear anchoring system (1) via the high-strength bolts (22).

3. The rear anchorage maintenance gantry vehicle for existing bridges according to claim 1, characterized in that: A braking system is provided in the running system (3), and the braking system is used to brake the running system.

4. The rear anchorage maintenance gantry vehicle for existing bridges according to claim 1, characterized in that: The running system (3) is internally provided with a bus controller, and the bus controller controls the movement of the hoist running mechanism (32) in the running system (3).

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