Telescopic front axle device of deck type tunnel inverted arch trestle

Abstract

The utility model belongs to the field of tunnel construction, particularly relates to a telescopic front axle device of a deck type tunnel inverted arch trestle, and aims to solve the problems that a front axle of an existing tunnel inverted arch trestle is fixed and cannot stretch out and draw back, so that the flexibility of a construction space is limited, and inconvenience is brought to operations such as binding of reinforcing steel bars, deslagging of an excavator, slag removal and the like. According to the technical scheme, a deck type box girder main bridge is included, a front axle lifting riding wheel beam is arranged at the top of the deck type box girder main bridge, riding wheel beam guiding outer sliding sleeves are arranged at the two ends of the front axle lifting riding wheel beam correspondingly, and riding wheel beam telescopic oil cylinders are arranged at the bottoms of the riding wheel beam guiding outer sliding sleeves; the telescopic front axle device of the deck type tunnel inverted arch trestle can stretch out and draw back in real time, move up and down to adjust the angle, adapt to the working condition that the height of a mound of a front tunnel face changes, and effectively protect equipment in blasting operation, the construction efficiency can be remarkably improved, the safety of constructors is guaranteed, and the risk that the equipment is damaged is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to a tunnel construction technical field especially relates to a telescopic front bridge device of deck type tunnel inverted arch trestle. BACKGROUND

[0002] In the tunnel construction process, the inverted arch trestle as the key equipment, its design and function are important to improve the construction efficiency, guarantee the safety of construction personnel and adapt to the changeable construction environment. The traditional tunnel inverted arch trestle often has the problems of fixed front bridge and telescopic, which not only limits the flexibility of construction space, but also brings inconvenience to the operations such as steel binding, excavator slagging and slag cleaning. In addition, in the face of the situation of the height change of the front face soil pile, the traditional trestle often cannot adapt, and needs to be adjusted complicatedly. More seriously, in the blasting operation, the fixed front bridge is easy to be damaged by the shock wave and blasting fly rock, which brings hidden dangers to the construction safety.

[0003] In order to solve the above problems, various improved schemes appear in the prior art, but most of them have the defects of complex structure, complicated operation, poor adaptability and the like. Therefore, there is an urgent need for a telescopic front bridge device of tunnel inverted arch trestle which is simple in structure, convenient in operation, strong in adaptability and can effectively protect the equipment. UTILITY MODEL CONTENT

[0004] The utility model aims at solving the defects that the tunnel inverted arch trestle often has the problems of fixed front bridge and telescopic in the prior art, limits the flexibility of construction space, and brings inconvenience to the operations such as steel binding, excavator slagging and slag cleaning, and proposes a telescopic front bridge device of deck type tunnel inverted arch trestle.

[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0006] A telescopic front bridge device of deck type tunnel inverted arch trestle, comprising a deck type box girder main bridge, the top of the deck type box girder main bridge is provided with a front bridge lifting roller beam, the two ends of the front bridge lifting roller beam are provided with roller beam guide outer sliding sleeves, the bottom of the roller beam guide outer sliding sleeve is provided with a roller beam telescopic oil cylinder, the top of the deck type box girder main bridge is provided with a trestle main bridge plate, the top of the trestle main bridge plate is provided with a telescopic front bridge assembly in sliding mode, one end of the deck type box girder main bridge is provided with a movable supporting leg, the telescopic front bridge assembly comprises a front bridge one, a front bridge two and a front bridge three, the front bridge one, the front bridge two and the front bridge three are integrally formed, the inside of the telescopic front bridge assembly is provided with a telescopic bridge chain traction drive system, and the front end of the telescopic front bridge assembly is provided with a front end lifting translation supporting leg.

[0007] In a possible design, the top of the deck type box girder main bridge is provided with a box girder guard plate on both sides.

[0008] In a possible design, the side of the telescopic front bridge assembly is provided with a notched wheel walking assembly, and the two ends of the stack main bridge plate are provided with notched wheel C-shaped tracks, which are used in cooperation with the notched wheel walking assembly.

[0009] In a possible design, the bottom of the telescopic front bridge assembly is provided with a walking mechanism jacking oil cylinder, and the other end of the telescopic front bridge assembly is provided with a small rear drawbridge.

[0010] In a possible design, the telescopic bridge chain traction drive system comprises a support, the top of the support is provided with a double-shaft motor, the two output shafts of the double-shaft motor are fixedly connected with driving sprockets, the two sides of the support are fixedly connected with two symmetrically arranged driven sprockets, the top of the telescopic front bridge assembly is provided with a traction point, and the outer walls of the driving sprockets and the driven sprockets are provided with the same chain body, which is used in cooperation with the traction point and is used to drive the transverse movement of the upper-supported box girder main bridge.

[0011] In a possible design, one end of the upper-supported box girder main bridge is provided with a large rear drawbridge.

[0012] In the present application, the telescopic front bridge is installed on the main bridge plate of the upper-supported stack bridge, the front bridge is driven to move longitudinally and reciprocally by the circulating chain winch drive system, the telescopic front bridge is extended or retracted on the main bridge plate, the telescopic front bridge is adjusted in pitch by the lifting of the lifting idler at the front end, and all the operation controls of the stack bridge are wirelessly controlled by the remote controller.

[0013] The lifting idler is lifted upward by operating the remote controller, the lifting idler is lifted, the front drawbridge is separated from the main bridge beam, and a gap is left, the upper rear drawbridge is lifted upward by operating the upper rear drawbridge lifting oil cylinder, the upper rear drawbridge is separated from the main bridge plate and no longer contacts, and a gap is left, and the above procedures are used as the preparation work before the front bridge is extended.

[0014] The front bridge chain drive system is started by operating the remote controller, the front drawbridge is extended to the front end of the backfilling of the slag, and attention is paid to the fact that the height of the lifting idler needs to be adjusted in real time during the extension of the front bridge to prevent the front bridge from interfering with the main bridge plate.

[0015] The front end of the lifting idler is lowered by operating the remote controller, the front bridge is slowly lowered to contact the slag and is placed stably, the upper rear drawbridge is in contact with the main bridge plate by operating the upper rear drawbridge lifting oil cylinder, and the above two procedures are used as the necessary work before the stack bridge is put into operation.

[0016] The telescopic front bridge is used for passing vehicles, the jacking oil cylinder is completely retracted, the lower base is in complete contact with the surface of the main bridge plate, the rear walking beam is left with a gap of 44 mm from the lower base, all the loads are transferred to the main bridge plate, and the walking wheels do not bear the load of the passing vehicles.

[0017] The telescopic bridge moving state: the telescopic bridge needs to be moved forward and backward in the longitudinal direction by first extending the jacking oil cylinder, making the lower base completely separate from the upper surface of the main bridge plate and having a 45mm gap, then extending the rear bridge oil cylinder, making the upper rear bridge separate from the main bridge plate, and then operating the chain traction mechanism.

[0018] Beneficial effects: the front bridge can be retracted in real time, the working space below the front bridge is lengthened, the reinforcement binding of the construction personnel is facilitated, and the space requirement of the excavator for slagging and slag cleaning is met.

[0019] The telescopic front bridge can be moved up and down to adjust the angle, and can adapt to the working condition of the height change of the front face soil pile.

[0020] The front bridge is retracted in real time, impact waves and blasting flying stones are avoided to damage the front bridge and the hydraulic oil cylinder, and the use safety of the lifting equipment is ensured.

[0021] The telescopic front bridge device of the upper bearing type tunnel inverted arch trestle bridge can be telescoped in real time, moved up and down to adjust the angle, adapt to the working condition of the height change of the front face soil pile, and effectively protect the equipment in the blasting operation. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 A front view structural schematic view of the telescopic front bridge device of the upper bearing type tunnel inverted arch trestle bridge is provided.

[0023] Figure 2 A front view structural schematic view of the telescopic front bridge device of the upper bearing type tunnel inverted arch trestle bridge is provided.

[0024] Figure 3 A front view structural schematic view of the telescopic front bridge device of the upper bearing type tunnel inverted arch trestle bridge is provided.

[0025] Figure 4 A front view structural schematic view of the telescopic front bridge device of the upper bearing type tunnel inverted arch trestle bridge is provided.

[0026] Figure 5 A front view structural schematic view of the telescopic front bridge device of the upper bearing type tunnel inverted arch trestle bridge is provided.

[0027] Figure 6 A front view structural schematic view of the telescopic front bridge device of the upper bearing type tunnel inverted arch trestle bridge is provided.

[0028] Figure 7 A structure schematic view of a small rear approach bridge in a telescopic front bridge device of an upper bearing type tunnel inverted arch trestle bridge is provided in the utility model;

[0029] Figure 8 A top view structure schematic view of a reversed hook wheel walking assembly and a walking mechanism jacking cylinder in a telescopic front bridge device of an upper bearing type tunnel inverted arch trestle bridge is provided in the utility model;

[0030] Figure 9 A side view structure schematic view of a reversed hook wheel walking assembly and a telescopic bridge chain traction driving system in a telescopic front bridge device of an upper bearing type tunnel inverted arch trestle bridge is provided in the utility model;

[0031] Figure 10 A structure schematic view of a telescopic bridge chain traction driving system in a telescopic front bridge device of an upper bearing type tunnel inverted arch trestle bridge is provided in the utility model;

[0032] Figure 11 A structure schematic view of a trestle main bridge plate and a telescopic front bridge assembly in a telescopic front bridge device of an upper bearing type tunnel inverted arch trestle bridge is provided in the utility model;

[0033] Figure 12 A structure schematic view when the telescopic front bridge device of an upper bearing type tunnel inverted arch trestle bridge is retracted is provided in the utility model;

[0034] Figure 13 A structure schematic view when the telescopic front bridge device of an upper bearing type tunnel inverted arch trestle bridge is extended is provided in the utility model;

[0035] Figure 14 A structure schematic view when the telescopic front bridge assembly of an upper bearing type tunnel inverted arch trestle bridge is lowered is provided in the utility model.

[0036] In the drawing: 1, large rear approach bridge; 2, upper bearing type box girder main bridge; 3, movable supporting leg; 4, front end lifting and translating supporting leg; 5, telescopic front bridge assembly; 6, front bridge lifting roller beam; 7, reversed hook wheel C-shaped track; 8, box girder guard plate; 9, roller beam guiding outer sliding sleeve; 10, roller beam telescopic oil cylinder; 11, small rear approach bridge; 12, front approach bridge one; 13, front approach bridge two; 14, front approach bridge three; 15, reversed hook wheel walking assembly; 16, walking mechanism jacking cylinder; 17, telescopic bridge chain traction driving system; 18, support; 19, chain main body; 20, driven sprocket; 21, driving sprocket; 22, double shaft motor; 23, trestle main bridge plate. DETAILED DESCRIPTION

[0037] Clearly, the described embodiments are merely a part of the embodiments of the present utility model, rather than all the embodiments.

[0038] Embodiment 1; as Figures 1-14 The telescopic front axle device mainly comprises a top-supported box girder main bridge 2, a front axle lifting supporting wheel beam 6, a supporting wheel beam guiding outer sleeve 9, a supporting wheel beam telescopic oil cylinder 10, a trestle main bridge plate 23, a telescopic front axle assembly 5, a movable supporting leg 3 and other related components.

[0039] Firstly, the top-supported box girder main bridge 2 serves as the main structure of the whole device, and the top thereof is provided with the front axle lifting supporting wheel beam 6. The two ends of the front axle lifting supporting wheel beam 6 are both provided with the supporting wheel beam guiding outer sleeve 9, and these sleeves ensure the stability and directivity of the front axle during the telescopic process. The bottom of the supporting wheel beam guiding outer sleeve 9 is provided with the supporting wheel beam telescopic oil cylinder 10, and the lifting of the front axle lifting supporting wheel beam 6 can be realized by controlling the telescopic process of these oil cylinders, thereby adjusting the height and angle of the front axle.

[0040] The trestle main bridge plate 23 is arranged on the top of the top-supported box girder main bridge 2, and the telescopic front axle assembly 5 is slidingly arranged on the top of the trestle main bridge plate 23. The telescopic front axle assembly 5 is integrally formed by the front leading bridge one 12, the front leading bridge two 13 and the front leading bridge three 14, and this design enhances the integrity and stability of the front axle. The telescopic front axle assembly 5 is internally provided with a telescopic bridge chain traction driving system 17, which is used for driving the telescopic movement of the front axle. Meanwhile, the front end of the telescopic front axle assembly 5 is also provided with a front end lifting translation supporting leg 4, so as to further enhance the stability and adaptability of the front axle.

[0041] In order to increase the safety and durability of the top-supported box girder main bridge 2, box girder guard plates 8 are arranged on the top of the two sides of the top-supported box girder main bridge 2. These guard plates can effectively prevent the impact and damage of external objects on the box girder main bridge.

[0042] The side surface of the telescopic front axle assembly 5 is provided with a hook wheel walking assembly 15, and the two ends of the trestle main bridge plate 23 are provided with hook wheel C-shaped tracks 7. The hook wheel walking assembly 15 and the hook wheel C-shaped track 7 are used in cooperation, so as to realize the smooth sliding and accurate positioning of the front axle on the trestle main bridge plate.

[0043] In addition, the bottom of the telescopic front axle assembly 5 is also provided with a walking mechanism jacking oil cylinder 16, which is used for adjusting the height and angle of the front axle. At the other end of the telescopic front axle assembly 5, a small rear leading bridge 11 is arranged, so as to further increase the telescopic range and adaptability of the front axle.

[0044] The specific structure of the telescopic bridge chain traction drive system 17 includes a support 18, a double-shaft motor 22, a driving sprocket 21, a driven sprocket 20 and a chain body 19. The support 18 is fixed inside the telescopic front bridge assembly 5, and the double-shaft motor 22 is installed on the top of the support 18. Both output shafts of the double-shaft motor 22 are fixedly connected with the driving sprocket 21, and two symmetrically arranged driven sprockets 20 are fixedly connected on both sides of the support 18. The chain body 19 is arranged around the outer walls of the driving sprocket 21 and the driven sprocket 20, and is used in cooperation with the traction point at the top of the telescopic front bridge assembly 5 to realize the telescopic drive of the front bridge.

[0045] By operating the remote controller or the related control device, the actions of the roller beam telescopic oil cylinder 10, the telescopic bridge chain traction drive system 17, the front end lifting and translating support leg 4 and the walking mechanism jacking oil cylinder 16 can be conveniently controlled, so as to realize the telescoping, lifting and angle adjustment of the front bridge and the like. This design not only improves the construction efficiency, but also enhances the construction safety, and effectively adapts to the changeable construction environment.

[0046] Embodiment 2; reference Figures 1-14 On the basis of Embodiment 1, the large rear approach bridge 1 is further arranged at one end of the top-supported box girder main bridge 2 to further increase the stability and carrying capacity of the whole device.

[0047] However, as known by those skilled in the art, the working principles and wiring methods of the roller beam telescopic oil cylinder 10, the double-shaft motor 22 and the walking mechanism jacking oil cylinder 16 are common, which belong to conventional means or common general knowledge, and will not be described here. Those skilled in the art can make any selection or arrangement according to their needs or convenience.

[0048] The above is only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited thereto. Any skilled person in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. A telescoping front bridge arrangement for a decked tunnel invert trestle, characterised in that, Include: The top of the deck box girder main bridge (2), the top of the deck box girder main bridge (2) is provided with front bridge lifting roller beam (6), both ends of the front bridge lifting roller beam (6) are provided with roller beam guide outer sleeve (9), the bottom of the roller beam guide outer sleeve (9) is provided with roller beam telescopic oil cylinder (10), the top of the deck box girder main bridge (2) is provided with trestle main bridge plate (23), the top of the trestle main bridge plate (23) is provided with telescopic front bridge assembly (5), one end of the deck box girder main bridge (2) is provided with movable support leg (3), the telescopic front bridge assembly (5) includes front lead bridge one (12), front lead bridge two (13) and front lead bridge three (14), the front lead bridge one (12), the front lead bridge two (13) and the front lead bridge three (14) are integrally formed, the inside of the telescopic front bridge assembly (5) is provided with telescopic bridge chain traction drive system (17), the front end of the telescopic front bridge assembly (5) is provided with front end lifting translation support leg (4).

2. A telescoping front bridge arrangement for a decked tunnel inverted-arch viaduct according to claim 1, characterised in that, The top of the deck box girder main bridge (2) is provided with box girder guard plate (8) on both sides.

3. A telescoping front bridge apparatus for a decked tunnel inverted arch bridge as defined in claim 1 wherein, The side of the telescopic front bridge assembly (5) is provided with inverted hook wheel walking assembly (15), both ends of the trestle main bridge plate (23) are provided with inverted hook wheel C track (7), the inverted hook wheel walking assembly (15) and the inverted hook wheel C track (7) are used in cooperation.

4. A telescoping front bridge apparatus for a decked tunnel inverted-arch bridge according to claim 1, wherein, The bottom of the telescopic front bridge assembly (5) is provided with walking mechanism jacking oil cylinder (16), the other end of the telescopic front bridge assembly (5) is provided with small rear lead bridge (11).

5. A telescoping front bridge apparatus for a decked tunnel inverted arch bridge according to claim 1, wherein, The telescopic bridge chain traction drive system (17) includes support (18), the top of the support (18) is provided with double shaft motor (22), the two output shafts of the double shaft motor (22) are fixedly connected with driving sprocket (21), both sides of the support (18) are fixedly connected with two symmetrically arranged driven sprockets (20), the top of the telescopic front bridge assembly (5) is provided with traction point, the outer wall of the driving sprocket (21) and the driven sprocket (20) is provided with the same chain body (19), the traction point is used in cooperation with the chain body (19) and is used for driving the deck box girder main bridge (2) to move transversely.

6. A telescoping front bridge apparatus for a decked tunnel inverted-arch bridge according to claim 1, wherein, One end of the deck box girder main bridge (2) is provided with large rear lead bridge (1).

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