Box girder internal all-around maintenance vehicle

Abstract

The application discloses a box girder internal omnibearing maintenance vehicle, which comprises a lower layer trolley and an upper layer trolley; the lower layer trolley is arranged on a longitudinal track in the box girder; the upper layer trolley is provided with a spanning wheel capable of spanning a reinforced rib, and the span of the spanning wheel is adjustable; the upper layer trolley is arranged on the lower layer trolley through a separation and combination device; when longitudinal maintenance is performed, the upper layer trolley is fastened with the lower layer trolley through the separation and combination device and moves longitudinally along with the lower layer trolley; when transverse maintenance is performed, the upper layer trolley is separated from the lower layer trolley through the separation and combination device and moves transversely away from the lower layer trolley; and a lifting maintenance platform is arranged on the upper layer trolley. The application realizes free walking of the box girder in three directions of the longitudinal direction, the transverse direction and the vertical direction, realizes the accessibility and inspection of the box girder in all directions, reduces the labor consumption of the inspection, maintenance and repair of the box girder, and improves the maintenance efficiency of the box girder.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of bridge detection, and particularly relates to a box girder internal all-around inspection vehicle. BACKGROUND

[0002] At present, among the bridges built in China, the main girder of many bridges, especially large-span bridges, uses box girder structure. The box girder is usually divided into many segments, which are processed and manufactured in a factory and then transported to the site for assembly. Due to the collision and friction of the box girder during transportation and hoisting, problems such as scratch of the inner and outer surface coating may occur. In the process of welding construction, welding burn may also occur. The environment of the bridge itself is usually relatively harsh, and the bridge is subjected to vehicle load, wind load and other external forces for a long time. Especially for bridges over rivers, they are also in an environment with relatively heavy air humidity. The box girder is more prone to corrosion and fatigue damage, and problems such as cracks, coating falling off, weld defects, and high-strength bolt loosening often occur. In order to ensure the safety of the bridge life, it is necessary to regularly inspect, maintain and repair the inside of the box girder.

[0003] The height of the inside of the box girder is usually more than 3 meters. The bottom and top of the box girder use U-shaped ribbed ribs. The height of the ribbed rib is usually relatively high, and the distribution interval is relatively large. The existing research on bridge inspection equipment mainly focuses on the outside of the box girder. The manual inspection of the inside of the box girder is usually the main method. Manual inspection not only requires carrying a large amount of inspection equipment, but also requires being in a closed space for a long time. For large-span bridge inspection work, the labor consumption is huge, and the efficiency is relatively low. It is also difficult to inspect some relatively high spaces. At present, the inspection equipment for the inside of the box girder includes a track inspection vehicle, but this inspection vehicle cannot completely reach all positions inside the box girder including the top plate of the box girder without leaving the track. SUMMARY

[0004] The purpose of the present application is to overcome the deficiencies in the prior art and provide a box girder internal all-around inspection vehicle.

[0005] To solve the above technical problems, the present application is realized by the following scheme:

[0006] The present application provides a box girder internal all-around inspection vehicle, which comprises a lower trolley and an upper trolley.

[0007] The lower trolley is arranged on the longitudinal track inside the box girder.

[0008] The upper trolley is provided with a spanning wheel capable of spanning the ribbed rib, and the span of the spanning wheel is adjustable. The upper trolley is arranged on the lower trolley through a separation and combination device. When longitudinal inspection is performed, the upper trolley is fastened to the lower trolley through the separation and combination device and moves longitudinally with the lower trolley. When transverse inspection is performed, the upper trolley is separated from the lower trolley through the separation and combination device and moves transversely away from the lower trolley.

[0009] The upper trolley is provided with a lifting maintenance platform.

[0010] Preferably, the upper trolley is provided with a horizontal telescopic device and a rotating device; the horizontal telescopic device is connected to the rotating device and is used to drive the striding wheel to extend or retract; the rotating device is connected to the striding wheel and is used to drive the striding wheel to rotate by a preset angle.

[0011] Preferably, the horizontal telescopic device is an electric cylinder, and the electric cylinder is fixed on the upper trolley; the rotating device is a hub motor.

[0012] Preferably, the striding wheel is a plum blossom wheel, and the protruding part of the plum blossom wheel is provided with a telescopic supporting leg, and the plum blossom wheel adjusts the span through the telescopic adjustment of the supporting leg.

[0013] Preferably, the plum blossom wheel comprises two plum blossom-shaped side plates arranged oppositely, a plurality of radial supporting strips are arranged in the gap between the two plum blossom-shaped side plates, and a supporting leg is slidably arranged on the supporting strip corresponding to the protruding part of the plum blossom-shaped side plate.

[0014] Preferably, a gear is arranged in the middle of the supporting leg, a rack is arranged on the supporting strip corresponding to the supporting leg, and the supporting leg adjusts the distance of sliding along the corresponding supporting strip through the meshing transmission of the gear and the rack.

[0015] Preferably, limit supporting devices are arranged on both sides of the bottom end of the supporting leg, and the limit supporting devices comprise a base and a hydraulic rod, and the two ends of the hydraulic rod are rotatably connected to the base and the bottom end of the supporting leg, respectively.

[0016] Preferably, the separating and combining device comprises a walking gear and a walking rack, and the walking gear and the walking rack are meshed with each other.

[0017] A plurality of walking gears are arranged at the separating and combining position of the upper trolley, and the walking gears are configured with a driving motor.

[0018] The walking rack comprises a fixed rack and a movable rack, and when the upper trolley and the lower trolley are separated, the fixed rack and the movable rack are connected to each other to form a walking rack track.

[0019] The fixed rack is arranged at the separating and combining position of the lower trolley, the movable rack is arranged on a movable rack support frame, the movable rack support frame is rotatably connected to the longitudinal two sides of the lower trolley, and the movable rack support frame is configured with a rotating motor.

[0020] Preferably, the separating and combining device further comprises an upper and lower vehicle body locking device, which is used to lock the upper trolley and the lower trolley when longitudinal maintenance is performed; the upper and lower vehicle body locking device comprises a plurality of locks, and the locks are arranged on the lower vehicle body.

[0021] Preferably, the device further comprises a limit walking wheel, the limit walking gear is arranged between the walking gears on the upper trolley, and the limit walking gear is erected and clamped on the walking rack track through a transition fitting frame.

[0022] Compared with the prior art, the application has the advantages that: the application realizes free walking in the longitudinal direction, the transverse direction and the vertical direction of the box girder, realizes full-direction accessibility of the box girder, reduces labor consumption of inspection, maintenance and repair of the box girder, and improves the inspection efficiency of the box girder. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 is a structural schematic diagram of a box girder internal omnibearing maintenance vehicle provided by the embodiment of the application;

[0024] Figure 2 is a schematic diagram of a cross section of the box girder internal omnibearing maintenance vehicle provided by the embodiment of the application in longitudinal walking or maintenance;

[0025] Figure 3 is a working schematic diagram of a separation and combination device in the box girder internal omnibearing maintenance vehicle provided by the embodiment of the application;

[0026] Figure 4 is a schematic diagram of a cross section of the separation and combination device in the box girder internal omnibearing maintenance vehicle provided by the embodiment of the application;

[0027] Figure 5 is a structural schematic diagram of longitudinal movement or maintenance of an upper-layer trolley in the box girder internal omnibearing maintenance vehicle provided by the embodiment of the application;

[0028] Figure 6 is a structural schematic diagram of transverse movement or maintenance of the upper-layer trolley in the box girder internal omnibearing maintenance vehicle provided by the embodiment of the application;

[0029] Figure 7 is a schematic diagram of transverse movement of the upper-layer trolley in the box girder internal omnibearing maintenance vehicle provided by the embodiment of the application;

[0030] Figure 8 is an external structural schematic diagram of a striding wheel retracting a supporting leg in the box girder internal omnibearing maintenance vehicle provided by the embodiment of the application;

[0031] Figure 9 is an internal structural schematic diagram of the striding wheel retracting the supporting leg in the box girder internal omnibearing maintenance vehicle provided by the embodiment of the application;

[0032] Figure 10 is an external structural schematic diagram of a striding wheel extending a supporting leg in the box girder internal omnibearing maintenance vehicle provided by the embodiment of the application;

[0033] Figure 11 is an internal structural schematic diagram of the striding wheel extending the supporting leg in the box girder internal omnibearing maintenance vehicle provided by the embodiment of the application;

[0034] In the figure: 1, cross wheel; 2, rotating device; 3, horizontal telescopic device; 4, separating and combining device; 5, movable rack; 6, movable rack support frame; 7, upper trolley; 8, lifting maintenance platform; 9, lower trolley; 10, lower trolley walking system; 11, longitudinal rail; 12, supporting leg; 13, lock catch; 14, rib; 15, walking gear; 16, fixed rack; 17, limiting walking gear; 18, support bar; 19, limiting support device; 20, base; 21, hydraulic rod. DETAILED DESCRIPTION

[0035] The application will be further described below with reference to the drawings. The following examples are only used to more clearly illustrate the technical solutions of the application, and cannot be used to limit the protection scope of the application.

[0036] In the description of the application, it should be noted that unless explicitly defined and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral connection; can be mechanical connection, or electrical connection; can be directly connected, or indirectly connected through intermediate medium, or the communication between two elements. For those skilled in the art, the specific meaning of the above terms in the application can be understood through specific circumstances.

[0037] In the description of the application, it should be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only used to facilitate the description of the application and simplify the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation to the application.

[0038] As Figures 1 to 11As shown, the embodiment provides a box girder internal all-around maintenance vehicle, which is composed of a lower trolley 9 and an upper trolley 7. The lower trolley 9 is arranged on the longitudinal track 11 inside the box girder; the upper trolley 7 is provided with a spanning wheel 1 capable of spanning the reinforced rib 14, and the span of the spanning wheel 1 is adjustable; the upper trolley 7 is arranged on the lower trolley 9 through a separation and combination device 4; when longitudinal maintenance is performed, the upper trolley 7 is fastened with the lower trolley 9 through the separation and combination device 4; the upper trolley 7 is parked and locked on the lower trolley 9, and the upper trolley 7 and the lower trolley 9 are kept in a combined state at all times and move longitudinally with the lower trolley 9; when transverse maintenance is performed, the upper trolley 7 is separated from the lower trolley 9 through the separation and combination device 4 and moves transversely away from the lower trolley 9; the upper trolley 7 is provided with a lifting maintenance platform 8, and the lifting maintenance platform 8 is provided with equipment and components required for maintenance (not shown in the figure, for internal maintenance of the box girder, prior art), and the lifting maintenance platform 8 is lifted through a hydraulic element to realize the up-and-down movement of the maintenance platform in the vertical direction. The box girder internal all-around maintenance vehicle realizes the free movement of the maintenance vehicle in the longitudinal direction (longitudinal direction), the transverse direction (transverse direction) and the vertical direction inside the box girder, realizes the accessibility and inspection of the internal box girder in all directions, reduces the labor consumption of the internal inspection, maintenance and repair of the box girder, and improves the maintenance efficiency inside the box girder.

[0039] Specifically, the box girder internal all-around maintenance vehicle realizes the free movement and maintenance of the maintenance vehicle in the longitudinal direction (longitudinal direction) on the longitudinal track 11 by retaining the original longitudinal track 11 structure of the box girder and adding a power driving system at the front and rear ends of the lower trolley 9 to drive the walking wheels arranged at the bottom of the lower trolley 9 Figure 4 As shown, the upper trolley 7 is provided with a horizontal telescopic device 3 and a rotating device 2; the horizontal telescopic device 3 is connected with the rotating device 2 and is used to drive the spanning wheel 1 to extend or retract; the rotating device 2 is connected with the spanning wheel 1 and is used to drive the spanning wheel 1 to rotate by a preset angle. The horizontal telescopic device 3 is an electric cylinder, which is fixed on the upper trolley 7; the rotating device 2 is a wheel hub motor, which only controls the rotation of the wheel end; the rotation of the spanning wheel 1 (used to realize the action of spanning the reinforced rib 14) is realized through a general driving motor.

[0040] The cross wheel 1 is a plum blossom wheel with a plum blossom shape. The plum blossom-shaped cross wheel 1 can effectively engage with the U-shaped reinforcing ribs 14, effectively fix and prevent slipping, the minimum diameter of the cross wheel 1 is 2 times the longest distance of the adjacent reinforcing rib 14 groove, the large-diameter cross wheel 1 can smoothly cross the reinforcing rib 14 obstacle, and can quickly and efficiently move in the transverse direction (transversely). The protruding part of the plum blossom wheel is provided with retractable legs 12, a total of 6, the plum blossom wheel adjusts the span through the extension and retraction of the legs 12, can cross the U-shaped reinforcing rib 14 at different intervals, and can realize free movement in the transverse direction (transversely) inside the box girder. The plum blossom wheel includes two plum blossom-shaped side plates arranged oppositely, a plurality of radial support bars 18 are arranged in the gap between the two plum blossom-shaped side plates, the support bars 18 corresponding to the protruding part of the plum blossom-shaped side plate are slidably provided with legs 12, the middle of the leg 12 is provided with a gear, the support bar 18 corresponding to the leg 12 is provided with a rack, the leg 12 adjusts the distance of sliding along the corresponding support bar 18 through the meshing transmission of the gear and the rack: the gear is driven to rotate by the motor and meshes with the rack, thereby realizing the extension and retraction of the leg 12 and adjusting the span of the plum blossom wheel. The two sides of the bottom end of the leg 12 are provided with limiting support devices 19, the limiting support devices 19 are used for limiting and supporting the extension and retraction of the leg 12, the limiting support device 19 includes a base 20 and a hydraulic rod 21, and the two ends of the hydraulic rod 21 are respectively rotatably connected with the base 20 and the bottom end of the leg 12.

[0041] The separation and combination device 4 includes walking gears 15 and walking racks, the walking gears 15 and the walking racks are meshed with each other; a plurality of walking gears 15 are arranged at the separation and combination part (transversely) of the upper trolley 7, and the walking gears 15 are provided with driving motors; the walking rack includes a fixed rack 16 and a movable rack 5, the fixed rack 16 is arranged at the separation and combination part of the lower trolley 9, and the movable rack 5 is arranged on a movable rack support frame 6, the movable rack support frame 6 is rotatably connected to the two longitudinal sides of the lower trolley 9 (the angle is 10°), and the movable rack support frame 6 is provided with a rotating motor. When the maintenance vehicle passes through the box girder hole, the movable rack support frames 6 on the two sides of the lower trolley 9 are retracted to a folded state under the driving of the motor; when the upper trolley 7 and the lower trolley 9 are separated, the movable rack support frames 6 on the two sides of the lower trolley 9 are rotated outward by 90° under the driving of the motor, the movable rack 5 on the movable rack support frame 6 is connected with the fixed rack 16 arranged on the lower trolley 9 to form a walking rack track, the walking gears 15 of the upper trolley 7 are meshed with the walking rack of the walking rack track, and the upper trolley 7 is driven to walk on the walking rack track through the motor provided on the walking gear 15. In addition, four limiting walking gears 17 are arranged between the upper trolley 7 and the walking gears 15, the limiting walking gears 17 are located on the walking rack track, the hub on the two sides of the limiting walking gear 17 is higher than the rack teeth of the walking rack track, and the limiting walking gear 17 is clamped on the walking rack track in the form of transition fit, so as to ensure the correct walking posture of the upper trolley 7 on the walking rack track.

[0042] The separating and combining device 4 further comprises an up-and-down car body locking device, which comprises a plurality of buckles 13 arranged on the lower trolley 9. The buckles 13 are used to lock and fix the upper trolley 7 and the lower trolley 9 when the maintenance vehicle is longitudinally moving or being maintained.

[0043] Working principle: 1) The box girder internal omnidirectional maintenance vehicle is able to freely move and maintain in the longitudinal direction of the longitudinal track 11 by means of the original longitudinal track 11 structure of the box girder and the driving of the power driving system arranged at the front and rear ends of the lower trolley 9; 2) When the box girder internal omnidirectional maintenance vehicle moves horizontally to a designated maintenance position, the cross wheels 1 are driven to extend by the horizontal telescopic device 3 (electric cylinder) and then are driven to rotate outward by 90° by the rotating device 2 (wheel hub motor), so that the four cross wheels 1 are all unfolded outward, and the span of the cross wheels 1 is adjusted according to the spacing of the ribbed ribs 14 (by means of the telescopic legs 12 in the cross wheels 1), then the buckles 13 in the separating and combining device 4 are unlocked and the upper trolley 7 is lowered (the separating and moving of the upper trolley 7 and the lower trolley 9 are realized by the meshing transmission of the walking gear 15 and the rack of the walking rack track), and the upper trolley 7 is moved along the U-shaped ribbed ribs 14 by the driving of the four cross wheels 1 and is maintained; the upper trolley 7 can move to the left and right sides (in the horizontal direction of the bridge), and only needs to be pushed in the opposite direction by reversing the corresponding motor and repeating the unfolding process of the cross wheels 1; 3) The lifting maintenance platform 8 is arranged on the upper trolley 7 and is lifted by the hydraulic element, so as to realize the up-and-down movement of the maintenance platform in the vertical direction. The above-mentioned three working states can be controlled by the existing electric control system (such as the PLC system) to realize the mutual cooperation and non-interference of all the power driving systems, motors, electric cylinders, hydraulic rods (controlled by electromagnetic valves) and other components in the box girder internal omnidirectional maintenance vehicle, and the whole bridge direction of the box girder is reachable and maintainable.

[0044] It should be understood that the contents not described in detail in the embodiments are all prior art.

[0045] The above is only the preferred embodiment of the present application, and it should be pointed out that, for ordinary skilled in the art, without departing from the technical principles of the present application, a number of improvements and modifications can be made, and these improvements and modifications should be considered as the protection scope of the present application.

Claims

1. A vehicle for comprehensive internal inspection of box girders, characterized in that, Includes lower-level trolleys and upper-level trolleys; The lower trolley is set on the longitudinal track inside the box girder; The upper trolley is equipped with a crossing wheel that can cross the reinforcing ribs, and the span of the crossing wheel is adjustable. The upper trolley is mounted on the lower trolley via a separation and connection device. During longitudinal maintenance, the upper trolley is fastened to the lower trolley via the separation and connection device and moves longitudinally with the lower trolley. During lateral maintenance, the upper trolley is separated from the lower trolley via the separation and connection device and moves laterally away from the lower trolley. The upper trolley is equipped with a lifting maintenance platform; The upper trolley is equipped with a horizontal telescopic device and a rotating device; The horizontal telescopic device is connected to the rotating device and is used to drive the cross wheel to extend or retract. The rotating device is connected to the traverse wheel and is used to drive the traverse wheel to rotate at a preset angle; The separation and engagement device includes a traveling gear and a traveling rack, which mesh with each other; Several traveling gears are provided at the separation and engagement points of the upper trolley, and the traveling gears are equipped with drive motors; The traveling rack includes a fixed rack and a movable rack. When the upper trolley and the lower trolley are separated, the fixed rack and the movable rack are connected to each other to form a traveling rack track. The fixed rack is located at the separation joint of the lower trolley, and the movable rack is located on the movable rack support frame. The movable rack support frame is rotatably connected to both longitudinal sides of the lower trolley, and the movable rack support frame is equipped with a rotating motor.

2. The all-around inspection vehicle for the interior of a box girder according to claim 1, characterized in that, The horizontal telescopic device is an electric cylinder, which is fixed on the upper trolley; the rotating device is a hub motor.

3. The all-around inspection vehicle for the interior of a box girder according to claim 1, characterized in that, The span wheel is a swivel wheel, and the protruding part of the swivel wheel is equipped with retractable support legs. The span of the swivel wheel is adjusted by extending and retracting the support legs.

4. The all-around inspection vehicle for the interior of a box girder according to claim 3, characterized in that, The plum blossom wheel includes two plum blossom-shaped side plates arranged opposite each other, and a number of radial support bars are arranged in the gap between the two plum blossom-shaped side plates. Support legs are slidably arranged on the support bars corresponding to the protrusions of the plum blossom-shaped side plates.

5. A comprehensive inspection vehicle for the interior of a box girder according to claim 4, characterized in that, A gear is installed in the middle of the outrigger, and a rack is installed on the support bar corresponding to the outrigger. The outrigger adjusts the distance it slides along the corresponding support bar through the meshing transmission of the gear and the rack.

6. A box girder internal all-around inspection vehicle according to claim 4, characterized in that, Limiting support devices are provided on both sides of the bottom end of the outrigger. The limiting support devices include a base and a hydraulic rod. The two ends of the hydraulic rod are rotatably connected to the base and the bottom end of the outrigger, respectively.

7. A comprehensive inspection vehicle for the interior of a box girder according to claim 1, characterized in that, The separation and connection device also includes an upper and lower car body locking device, which is used to lock the upper car body and the lower car body during longitudinal maintenance; the upper and lower car body locking device includes several latches, which are set on the lower car body.

8. A comprehensive inspection vehicle for the interior of a box girder according to claim 1, characterized in that, It also includes a limiting travel gear, which is set on the upper trolley between the travel gears. The limiting travel gear is mounted and clamped on the travel rack track through a transition fit.

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