Tadpole-shaped bridge girder erection machine

Abstract

The utility model belongs to the technical field of bridge erecting, and particularly relates to a tadpole-shaped bridge erecting machine which comprises a front fixed bearing supporting leg, the upper portion of the front fixed supporting leg is fixedly connected to the front end of a main box girder, and sliding plates on the upper portions of a front middle supporting leg and a rear middle supporting leg are tightly attached to the lower portion of a track of the main box girder and support the main box girder. The lower portions of the front middle supporting leg and the rear middle supporting leg are supported on an erected beam face through jacking oil cylinders, the upper portion of the rear auxiliary supporting leg is connected with a rear guide beam lower chord, the main box girder is distributed at the front end of the bridge girder erection machine and is of a rectangular box girder structure, a track for a lifting crown block to walk is arranged on the upper portion of the main box girder, and a sliding track for the main box girder to move is arranged on the lower portion of the main box girder. According to the bridge girder erection machine, the relative positions of the guide beam and the main box girder are adjusted, the large main box girder for bearing the bridge girder is arranged in front, then the safe and reliable front fixed bearing supporting leg is arranged to stand on a half pier body, and then the two large hoisting crown blocks are used as counterweights, so that the requirements of safe girder erection and rapid hole passing are met.

Description

Technical Field

[0001] This utility model relates to the technical field of bridge erection, specifically a tadpole-shaped bridge erection machine. Background Technology

[0002] China's bridge construction industry is developing rapidly, with various new technologies, processes, and methods being increasingly applied, especially in urban bridge construction. The challenges of limited space, compact piers, long routes, tight schedules, and high construction quality place higher demands on bridge erection equipment. Specifically, this involves large-scale bridge erection machines that need to be able to safely and reliably traverse spans and erect beams atop piers. In urban light rail bridge construction, the high-position tensioning and integral beam-dropping method is often used for spans under 35m, and these are simply supported bridges. These bridges have many spans, requiring high efficiency, and there are no pre-embedded components in the piers or bridge deck. Furthermore, during erection, the front support leg can only stand on the narrow pier top and requires assistance for the bridge erection machine to traverse the spans. Simultaneously, the machine needs to be moved and hoisted at this support leg, making the process extremely difficult. Therefore, it is necessary to design a bridge erection machine that is simple and efficient to operate across spans, has safe and reliable support leg positioning, and allows for convenient and quick hoisting and relocation for such projects.

[0003] Currently, existing bridge erecting machines typically employ a design with the guide beam positioned in front and the main box girder positioned behind or in the middle, along with front auxiliary legs. The front and middle outriggers are anchored at pre-embedded anchor points on the pier tops. This design suffers from low span-crossing efficiency, complex outrigger construction, and large space requirements, impacting hoisting and transport, and involving numerous outrigger relocation procedures. Pre-embedding is required on half of the pier body, with extremely high requirements for pre-embedding. Improper operation or insufficiently secure pre-embedding can affect the stability of the outriggers, potentially leading to major safety accidents. Therefore, it is necessary to invent a new type of bridge erecting machine to address the difficulties in constructing such bridges. Utility Model Content

[0004] The purpose of this section is to outline some aspects of the embodiments of this utility model and to briefly introduce some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be used to limit the scope of this utility model.

[0005] Therefore, the purpose of this utility model is to provide a tadpole-shaped bridge erecting machine. This type of bridge erecting machine adjusts the relative position of the guide beam and the main box girder, places the load-bearing main box girder in front, and then sets a safe and reliable front fixed support leg station on half of the pier body. Then, two large cranes are used as counterweights to achieve the requirements of safe bridge erection and rapid span crossing.

[0006] To solve the above-mentioned technical problems, according to one aspect of the present invention, the present invention provides the following technical solution:

[0007] A tadpole-shaped bridge erecting machine, comprising:

[0008] Front fixed outrigger, front middle outrigger, rear middle outrigger, rear auxiliary outrigger, main box girder, rear guide beam, overhead crane, end hoist, in-span hoist, hoisting and unloading electric hoist;

[0009] The upper part of the front fixed support leg is fixed to the front end of the main box girder. The upper sliding plates of the front middle support leg and the rear middle support leg are close to the lower part of the main box girder track to support the main box girder. The lower part is supported on the erected beam surface by the lifting cylinder. The upper part of the rear auxiliary support leg is connected to the lower chord of the rear guide beam.

[0010] The main box girder is located at the front end of the bridge erecting machine and is a rectangular box girder structure. The upper part of the main box girder is equipped with a track for the crane to travel on, and the lower part of the main box girder is equipped with a sliding track for the main box girder to move. The guide beam is installed at the tail of the main box girder.

[0011] The overhead crane is located on the upper track of the main box girder and can travel along the longitudinal track of the main box girder and guide beam along the entire length of the bridge.

[0012] The main box girder is equipped with end hangers and intra-span hangers in the hanging ducts, and a hoist for reversing is suspended on the main box girder moving plate.

[0013] In a preferred embodiment of the tadpole-shaped bridge erecting machine described in this utility model, the lower part of the front fixed support leg is supported on the top of the bridge pier or on the surface of the erected beam.

[0014] In a preferred embodiment of the tadpole-shaped bridge erecting machine described in this utility model, the lower part of the rear auxiliary support leg is supported on the already erected beam surface.

[0015] In a preferred embodiment of the tadpole-shaped bridge erecting machine described in this utility model, the guide beam has an outer contour similar to the main box girder, but is only provided for passing through holes.

[0016] As a preferred embodiment of the tadpole-shaped bridge erecting machine described in this utility model, the overhead crane consists of a front overhead crane and a rear overhead crane. The front overhead crane is connected to the front end suspension, and the rear overhead crane is connected to the end suspension. Simultaneously, the entire span of concrete beam is lifted and placed on the bridge pier to form a bridge.

[0017] As a preferred embodiment of the tadpole-shaped bridge erecting machine described in this utility model, the front and rear middle support legs are connected to a longitudinal movement mechanism, a transverse movement mechanism, and a lifting mechanism.

[0018] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0019] 1) The main load-bearing box girder is placed in front, the guide beam is placed behind, and the front support leg is made into a rigid support leg that can withstand large loads, which has extremely high efficiency in passing through the hole and good safety.

[0020] 2) The front fixed leg is fixedly connected to the main box girder. It is located in the front half of the pier top, occupies little space, does not need to be anchored to the pier top, and is stable and reliable. At the same time, the front fixed leg has a simple structure and enough space for the electric hoist to pass through, making hoisting and unloading more convenient and efficient.

[0021] 3) Two sets of standard support legs are used, which can be interchanged. The support leg can be used to support the bridge erecting machine to pass through the hole on the bridge surface. The support leg does not need to be changed multiple times during the passage of the hole. It can be done in one go, which is fast and efficient.

[0022] 4) Two overhead cranes act as counterweights, providing better longitudinal stability for the bridge erecting machine; Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the embodiments of this utility model, the present utility model will be described in detail below with reference to the accompanying drawings and detailed embodiments. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them:

[0024] Figure 1 This is the front view of this utility model;

[0025] Figure 2 This is a schematic diagram of the support leg in this utility model;

[0026] Figure 3 This is a schematic diagram of the beam erection of this utility model;

[0027] Figure 4 This is a step diagram of the through-hole process of this utility model;

[0028] In the diagram: 1. Front fixed outrigger; 1-1. Diagonal brace; 2. Front middle outrigger; 3. Rear middle outrigger; 4. Rear auxiliary outrigger; 5. Main box girder; 6. Guide beam; 7-1 Front crane; 7-2 Rear crane; 8. End hoist; 9. Inner span hoist; 10. Hoisting and transporting electric hoist; 23-1. Longitudinal movement mechanism; 23-2. Lateral movement mechanism; 23-3. Lifting mechanism. Detailed Implementation

[0029] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0030] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0031] Secondly, this utility model is described in detail with reference to the schematic diagrams. When describing the embodiments of this utility model, for ease of explanation, the cross-sectional views showing the device structure may be partially enlarged, not according to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of this utility model. In addition, in actual manufacturing, the three-dimensional spatial dimensions of length, width, and depth should be included.

[0032] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.

[0033] This utility model provides a tadpole-shaped bridge erecting machine. Please refer to [link / reference]. Figure 1 It includes: front fixed outrigger 1, front middle outrigger 2, rear middle outrigger 3, rear auxiliary outrigger 4, main box girder 5, rear guide beam 6, crane 7, end hanger 8, span hanger 9, and hanging and transporting electric hoist 10.

[0034] The upper part of the front fixed support leg 1 is bolted to the front end of the main box girder 5. The upper sliding plates of the front middle support leg 2 and the rear middle support leg 3 are close to the lower part of the main box girder 5 track to support the main box girder 5. The lower part is supported on the beam surface by the lifting cylinder. The upper part of the rear auxiliary support leg 4 is connected to the lower chord of the rear guide beam 6.

[0035] The main box girder 5 is located at the front end of the bridge erecting machine and is a rectangular box girder structure. The upper part of the main box girder 5 is equipped with a track for the crane 7 to travel on, and the lower part of the main box girder 5 is equipped with a sliding track for the main box girder 5 to move. The guide beam 6 is installed at the tail of the main box girder 5.

[0036] The overhead crane 7 is located on the upper track of the main box girder 5 and can travel along the longitudinal track of the main box girder and guide beam along the entire length of the bridge.

[0037] The main box girder 5 is equipped with an end hanger 8 and an inner span hanger 9 suspended from the hanging duct, and a hanging and reversing electric hoist 10 is suspended from the moving plate of the main box girder 5.

[0038] Furthermore, the lower part of the front fixed support leg 1 is supported on the top of the bridge pier or on the surface of the erected beam. The internal structure of the front fixed support leg 1 has a large space, which facilitates unloading and hoisting.

[0039] Furthermore, the lower part of the rear auxiliary support leg 4 is supported on the already erected beam surface;

[0040] Furthermore, the guide beam 6 has an outer contour similar to the main box beam 5, but is only provided for the passageway;

[0041] Furthermore, the overhead crane 7 consists of a front overhead crane 7-1 and a rear overhead crane 7-2. The front overhead crane 7-1 is connected to the front suspension 8, and the rear overhead crane 7-2 is connected to the end suspension 8. At the same time, it lifts the entire span of concrete beam and places it on the bridge pier to form a bridge.

[0042] Furthermore, the front middle support leg 2 and the rear middle support leg 3 are connected to a longitudinal movement mechanism 23-1, a transverse movement mechanism 23-2 and a lifting mechanism 23-3;

[0043] 1) Beam erection condition:

[0044] The main box girder 5 of the bridge erecting machine is supported by the front fixed support leg 1 and the front middle support leg 2. The front fixed support leg 1 is supported on the front part of the current span pier top, and the front middle support leg 2 is supported on the bridge surface. The longitudinal movement mechanism 23-1, the transverse movement mechanism 23-2, and the lifting mechanism 23-3 on the front middle support leg 2 and the rear middle support leg 3 are used to adjust the state of the main box girder 5, so that the bridge alignment can be adjusted more easily during the girder erection. The overhead crane 7-1 lifts the segment concrete beams from under the bridge in sequence and suspends them in the suspension channels of the main box girder 5 through the inner span suspension 9 or the end suspension 8. The entire span segment concrete beams are assembled and tensioned into a whole span beam. Then the front overhead crane 7-1 is connected to the front end suspension 8, and the rear overhead crane 7-2 is connected to the end suspension 8. At the same time, the whole span concrete beam is lifted and placed on the bridge pier to form the bridge.

[0045] 2) Through holes for the entire machine:

[0046] After the current bridge construction is completed, the electric hoist 10 will move all the inner hanging 9s under the bridge to the bottom of the bridge. The front crane 7-1 will move the end hanging 8s to the back of the front fixed middle support leg 1 and stack them to support the rear auxiliary support leg 4 so that it acts on the already erected beam surface. The rear crane 7-2 will then move the rear middle support leg to the back of the front middle support leg 2 and support it closely.

[0047] The front middle support leg 2 retracts the lifting mechanism 23-3 to make enough space between it and the main box girder 5 track. The front crane 7-1 is used to move it to the position close to the end hanging 8 for support and installation, and the front fixed support leg 1 is lifted off the top surface of the pier, and then supported by the front middle support leg 2 and the rear middle support leg 3.

[0048] The two overhead cranes 7 move to the top of the rear middle outrigger 3 as counterweights, retract the rear auxiliary outrigger 4 and lift off the ground. The longitudinal movement mechanism 23-1 on the front middle outrigger 2 and the rear outrigger 3 is activated, and the bridge erecting machine is pushed to the next span. During this process, the two overhead cranes 8 stand directly above the middle outrigger 3 as counterweights until the front fixed outrigger 1 reaches the top of the pier. The attitude of the whole machine is adjusted by the transverse movement mechanism 23-2 and the lifting mechanism 23-3 to support the front fixed outrigger 1.

[0049] Using the front crane 7-1, the end hoist 8 was moved to the bottom of the bridge, and the next span of the bridge erection cycle began.

[0050] Although the present invention has been described above with reference to embodiments, various modifications can be made and components can be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the features in the embodiments disclosed in this invention can be combined with each other in any way. The lack of an exhaustive description of these combinations in this specification is merely for the sake of brevity and resource conservation. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A tadpole-shaped bridge erecting machine, characterized in that, include: Front fixed outrigger (1), front middle outrigger (2), rear middle outrigger (3), rear auxiliary outrigger (4), main box girder (5), rear guide beam (6), crane (7), end hanger (8), span hanger (9), hanging and reversing electric hoist (10); The upper part of the front fixed support leg (1) is fixed to the front end of the main box girder (5), the upper sliding plate of the front middle support leg (2) and the rear middle support leg (3) is close to the lower part of the main box girder (5) track, supporting the main box girder (5), and the lower part is supported on the beam surface by the lifting cylinder. The upper part of the rear auxiliary support leg (4) is connected to the lower chord of the rear guide beam (6). The main box girder (5) is located at the front end of the bridge erecting machine and is a rectangular box girder structure. The upper part of the main box girder (5) is provided with a track for the crane (7) to travel on, and the lower part of the main box girder (5) is provided with a sliding track for the main box girder (5) to move. The guide beam (6) is installed at the tail of the main box girder (5). The overhead crane (7) is located on the upper track of the main box girder (5) and can travel along the longitudinal track of the main box girder (5) and the guide beam (6) along the entire length of the bridge. The main box girder (5) is equipped with end hangers (8) and inner span hangers (9) on the hanging holes, and the main box girder (5) is equipped with a hoist (10) for reversing.

2. The tadpole-shaped bridge erecting machine according to claim 1, characterized in that, The lower part of the front fixed leg (1) is supported on the top of the bridge pier or on the surface of the erected beam.

3. The tadpole-shaped bridge erecting machine according to claim 2, characterized in that, The lower part of the rear auxiliary support leg (4) is supported on the erected beam surface.

4. The tadpole-shaped bridge erecting machine according to claim 3, characterized in that, The guide beam (6) has an outer contour similar to the main box beam (5), but is only set for the passage hole.

5. A tadpole-shaped bridge erecting machine according to claim 4, characterized in that, The overhead crane (7) consists of a front overhead crane (7-1) and a rear overhead crane (7-2). The front overhead crane (7-1) is connected to the front end hanger (8), and the rear overhead crane (7-2) is connected to the end hanger (8). At the same time, it lifts the entire span of concrete beam and places it on the bridge pier to form a bridge.

6. A tadpole-shaped bridge erecting machine according to claim 4, characterized in that, The front middle support leg (2) and the rear middle support leg (3) are connected to a longitudinal movement mechanism (23-1), a transverse movement mechanism (23-2) and a lifting mechanism (23-3).

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