A foldable bridge erecting machine single beam structure

Abstract

The utility model provides a kind of single beam structure of bridge erecting machine that can be bent, at least including single main beam and the two guide beams connected to the front and rear ends of main beam, and the bending angle of main beam and guide beam can be horizontal;The cross section of guide beam is triangular structure, the bottom of guide beam is flush with the bottom of main beam and the track is arranged in the bottom of guide beam, and main beam and two guide beams are connected by hinging;The connecting place between guide beam and main beam is provided with the horizontal rotation oil cylinder for controlling the bending angle of main beam and guide beam;The front and rear ends of main beam are further provided with cantilever beam, the cross section of cantilever beam is door-shaped, the top of cantilever beam is flush with the top of main beam and the crown block track is arranged on cantilever beam, and the crown block track on cantilever beam and the crown block track on main beam are continuously arranged to provide the walking of overhead travelling crane, and cantilever beam is above the end of guide beam, and the position of cantilever beam and the position of guide beam when bending are not interfered with each other. Under the premise of satisfying normal bending of main beam and front guide beam, the structure itself can realize reverse leg.

Description

Technical Field

[0001] This utility model provides a main beam for a single-beam segmental bridge erection machine, specifically relating to a bendable single-beam structure for a bridge erection machine, belonging to the field of bridge construction technology. Background Technology

[0002] Most segmental bridge erecting machines adopt a double-main-girder structure. The construction technology of double-girder segmental bridge erecting machines is relatively mature. In the construction of viaducts with small curves, the bending of the double main beams and front and rear guide beams enables construction with small curve turning radii. However, in situations where pier space is narrow and the single-line beam width is small, single-girder bridge erecting machines are more suitable. Because single-girder segmental bridge erecting machines need to meet the requirements of small curve construction, the main beam and front guide beam also need to be bent. However, in the crossing section, single-girder bridge erecting machines cannot use the crossing-leg-reversing method (which involves alternating the use of legs #2 and #3) to switch the middle leg from the main beam and guide beam (i.e., leg reversing) as with double-girder bridge erecting machines. This is because double-girder segmental bridge erecting machines have two main beams, allowing for the crossing-leg-reversing process; however, single-girder bridge erecting machines only have one main beam, so leg reversing can only be done sequentially, not crossing. Furthermore, due to the existence of the bending structure between the main beam and the guide beam, the track is discontinuous. Therefore, when moving the middle support leg through the hole, it is quite difficult to move it from the main beam to the guide beam or from the guide beam back to the main beam. It requires the assistance of external devices to complete, which is time-consuming and labor-intensive. Summary of the Invention

[0003] To address the aforementioned problems, this invention provides a novel bendable single-beam structure for bridge erecting machines. It overcomes the shortcomings of the prior art, enabling the reversing of legs using its own device while ensuring the normal bending of the main beam and the leading beam. It has the advantages of simple structure, reduced construction difficulty, and simplified construction process.

[0004] The technical solution adopted to achieve the above-mentioned objectives of this utility model is as follows:

[0005] A bendable bridge erecting machine single beam structure includes at least a single main beam and two guide beams connected to the front and rear ends of the main beam. The main beam and the guide beams can be bent horizontally at a certain angle.

[0006] The guide beam has a triangular cross-section. The bottom of the guide beam is flush with the bottom of the main beam and a track is provided at the bottom of the guide beam. Two horizontally distributed hinge seats are provided at the end face of the guide beam that connects to the main beam. Two horizontally distributed hinge seats are provided at the front and rear ends of the main beam. The main beam and the two guide beams are hinged together. A horizontal rotation cylinder is provided at the connection between the guide beam and the main beam. The two ends of the horizontal rotation cylinder are connected to the main beam and the guide beam respectively. The bending angle of the main beam and the guide beam is controlled by the extension and retraction of the horizontal rotation cylinder.

[0007] The main beam is also equipped with cantilever beams at both ends. The cross-section of the cantilever beam is U-shaped. The top of the cantilever beam is flush with the top of the main beam and a crane track is provided on the cantilever beam. The crane track on the cantilever beam is continuously provided with the crane track on the main beam for the crane to travel. The cantilever beam is located above the end of the guide beam, and the position of the cantilever beam does not interfere with the position of the guide beam when it is bent.

[0008] Furthermore, four horizontal rotating cylinders are provided, installed in pairs at both ends of the main beam. Two horizontal rotating cylinders are symmetrically arranged on the left and right, and located on the bottom sides of the connection between the guide beam and the main beam. The two ends of the horizontal rotating cylinders are connected to the guide beam and the main beam respectively through ear plates.

[0009] Furthermore, mechanical locks for fixing the angle between the guide beam and the main beam are installed at the connection points between them. The two ends of the mechanical locks are connected to the guide beam and the main beam respectively through ear plates.

[0010] Furthermore, four mechanical locks are provided, installed in pairs at both ends of the main beam, with two mechanical locks arranged symmetrically on the left and right, and located above the horizontal rotating cylinder.

[0011] Furthermore, the two horizontally distributed hinge seats are the upper hinge seat and the lower hinge seat, respectively. The upper hinge seat is located at the end of the top beam in the guide beam, and the lower hinge seat is located at the middle position of the end of the bottom beam in the guide beam.

[0012] Furthermore, the horizontal bending angle between the main beam and the guide beam is ≤ ±12°.

[0013] Furthermore, the main beam adopts a steel box girder structure, which is divided into two layers, upper and lower, connected by flange bolts; the main beam is composed of five segments.

[0014] Furthermore, the guide beam adopts a triangular truss structure, and a traveling platform is installed on the lower middle plane of the triangular truss.

[0015] Furthermore, the cantilever beam is a rectangular truss structure composed of two web plates on the left and right sides connected by a channel steel in the middle. The root of the cantilever beam is bolted to the web plate of the main beam with a joint plate, and the crane track is set above the two web plates on the left and right sides of the cantilever beam.

[0016] Furthermore, the front end of the cantilever beam is equipped with an upward-protruding wheel stop.

[0017] Compared with existing technologies, the bendable single-beam structure of the bridge erecting machine provided by this utility model has the following advantages: 1. In order to realize the leg reversal, this patent creatively proposes a cantilever beam structure. The cross-section of the cantilever beam is U-shaped, the top of the cantilever beam is flush with the top of the main beam, and a track is provided on the cantilever beam. The track on the cantilever beam is continuously arranged with the track on the main beam for the crane to travel. With the above structure, when reversing the legs, the crane can lift the middle support leg and transfer it from the main beam to the track of the guide beam to bypass the bend at the connection between the two, thereby realizing the leg reversal without the aid of external devices.

[0018] 2. In this patent, due to the presence of the cantilever beam, in order to prevent the cantilever beam from affecting the normal bending between the guide beam and the main beam, the cross-section of the guide beam is innovatively set as a triangular structure, while the cross-section of the cantilever beam is in the shape of a gate. This ensures that the position of the cantilever beam and the position of the guide beam during bending do not interfere with each other, so as to meet the normal bending requirements. Attached Figure Description

[0019] Figure 1 This is an overall schematic diagram of the single beam structure of the bendable bridge erecting machine in this utility model;

[0020] Figure 2 This is a top view of a single-beam structure in a bent state;

[0021] Figure 3 A schematic diagram of the overall structure of the main beam;

[0022] Figure 4 Top view of the overall structure of the main beam;

[0023] Figure 5 This is a schematic diagram of the overall structure of the guide beam;

[0024] Figure 6 This is a top view of the overall structure of the guide beam;

[0025] Figure 7 This is a side view of the overall structure of the guide beam;

[0026] Figure 8 A structural schematic diagram of the connection between the main beam and the guide beam;

[0027] Figure 9 for Figure 8 Sectional view along axis AA;

[0028] Figure 10 for Figure 8 BB-direction sectional view;

[0029] Figure 11 for Figure 8 CC-direction sectional view;

[0030] Figure 12 for Figure 8 DD section view;

[0031] Figure 13 This is a schematic diagram of the overall structure of the cantilever beam;

[0032] Figure 14 This is a top view of the overall structure of the cantilever beam;

[0033] Figure 15 This is a schematic diagram showing the state after the cantilever beam is connected to the main beam;

[0034] In the diagram: 1-Main beam, 2-Guide beam, 21-Upper hinge seat, 22-Lower hinge seat, 23-Traveling platform, 3-Cantilever beam, 31-Crane track, 32-Web plate, 33-Channel steel, 34-Stop, 4-Rotating cylinder, 5-Mechanical lock. Detailed Implementation

[0035] The following is a detailed description of this patent in conjunction with the accompanying drawings.

[0036] This embodiment provides a bendable single-beam structure for a bridge erecting machine, the main structure of which is as follows: Figure 1 and Figure 2 As shown, it includes a single main beam 1 and two guide beams 2 connected to the front and rear ends of the main beam 1. The structure of the main beam 1 is as follows: Figure 3 and Figure 4 As shown, the structure adopts a box girder design, with mature manufacturing technology and high reusability. The main girder is made of Q355B steel. The upper cover plate has thicknesses of 25mm, 22mm, and 16mm, and the lower cover plate has thicknesses of 25mm, 22mm, and 16mm, with a web thickness of 10mm for all. The steel box girder is divided into two layers with a total height of 5500mm, and the center width of both the upper and lower tracks is 2500mm. The total length of the steel box girder is 56500mm, and the main girder is divided into 5 segments, each 11300mm long. The entire main box girder is designed symmetrically around its centerline dimensions. The upper and lower layers are connected by flange bolts. The lower cover plate of the steel box girder has longitudinal tracks on both sides and a longitudinal perforated plate in the middle. The lower web plate has hanging longitudinal beams on both sides for suspending the segment beams, and the upper cover plate has overhead crane tracks. The total weight of the 5 segments of the steel box girder is approximately 218t.

[0037] The structure of guide beam 2 is as follows Figure 5 , Figure 6 and Figure 7The structure is divided into two parts: a front guide beam and a rear guide beam. The front and rear guide beams have identical structural forms and are symmetrically arranged. Guide beam 2 adopts a triangular truss structure, which is lightweight. The chord members are H-beams welded from plate (Q355B), and the web members are box-shaped members made of No. 22 channel steel (Q355B). A traveling platform 23 is installed on the lower middle plane of the triangular truss for convenient construction. Longitudinal tracks are provided on both sides of the lower part of guide beam 2, and a longitudinal perforated plate is provided in the middle. The front and rear guide beams are each 31150mm in total length, divided into three sections: the first section is 11890mm long, the second section is 11260mm long, and the third section is 8000mm long. The guide beam is also divided into upper and lower layers, with the upper layer approximately 2540mm high and the lower layer approximately 2500mm high. The front and rear guide beams have a total of six sections. The total weight is approximately 94t. The bottom of guide beam 2 is flush with the bottom of main beam 1, and a track is provided at the bottom of guide beam 2. Two horizontally distributed hinge seats are provided at the end face of guide beam 2 where it connects to main beam 1. Two horizontally distributed hinge seats are also provided at the front and rear ends of the main beam. The main beam and the two guide beams are hinged together. The two horizontally distributed hinge seats are upper hinge seat 21 and lower hinge seat 22, respectively. Upper hinge seat 21 is located at the end of the top beam in guide beam 2, and lower hinge seat 22 is located at the middle position of the end of the bottom beam in guide beam 2. Main beam 1 and guide beam 2 can be bent horizontally at a certain angle, and the horizontal bending angle between the main beam and the cantilever beam is ≤±12°.

[0038] A horizontal rotation cylinder 4 is installed at the connection between the guide beam 2 and the main beam 1, such as... Figure 8-12 As shown, the two ends of the horizontal rotating cylinder 4 are connected to the main beam 1 and the guide beam 2 respectively. The bending angle of the main beam 1 and the guide beam 2 is controlled by the extension and retraction of the horizontal rotating cylinder 4. Four horizontal rotating cylinders 4 are provided, installed in pairs at both ends of the main beam. Two horizontal rotating cylinders are symmetrically arranged on the left and right sides, located at the bottom sides of the connection between the guide beam and the main beam. The two ends of the horizontal rotating cylinders are connected to the guide beam and the main beam respectively through ear plates. Mechanical locks 5 are provided at the connection between the guide beam 2 and the main beam 1 to fix the angle between the guide beam and the main beam. The two ends of the mechanical locks 5 are connected to the guide beam and the main beam respectively through ear plates. Four mechanical locks 5 are provided, installed in pairs at both ends of the main beam. Two mechanical locks are symmetrically arranged on the left and right sides, located above the horizontal rotating cylinders. When it is necessary to adjust the bending angle, the mechanical locks are opened; after the angle adjustment is completed, the mechanical locks are locked in time.

[0039] Cantilever beams 3 are also provided at both ends of the main beam 1. The structure of the cantilever beams is as follows: Figure 13 , Figure 14 and Figure 15As shown, a single cantilever beam 3 has a total length of 4500mm. Its single weight is approximately 3t, and the total weight of the front and rear cantilever beams is approximately 6t. The cantilever beam 3 has a U-shaped cross-section. The top of the cantilever beam 3 is flush with the top of the main beam 1, and a crane track 31 is installed on the cantilever beam. The crane track 31 on the cantilever beam 3 is continuously connected to the crane track on the main beam 1 for crane movement. The cantilever beam 3 is located above the end of the guide beam 2, and its position does not interfere with the bending position of the guide beam 2. The cantilever beam 3 is a rectangular truss structure composed of two web plates 32 connected by a central channel steel 33. The root of the cantilever beam 3 is bolted to the web plate of the main beam 1 using a joint plate. The crane track 31 is located above the two web plates 32 of the cantilever beam. A raised stop 34 is provided at the front end of the cantilever beam 3.

[0040] This utility model provides a bendable single-beam structure for a bridge erecting machine. The outriggers are transported using a self-propelled method, with the middle outrigger either mounted upside down on the lower flange of the main beam or lifted and transported by an overhead crane. A cantilever beam is installed above the hinged joint between the guide beam and the main beam. The overhead crane, positioned on the cantilever beam, can lift the middle outrigger and transport it to the main box girder, avoiding the notch at the swivel joint. The cantilever beam and guide beam are arranged in staggered layers, with the guide beam rotating to avoid the cantilever beam, allowing the overhead crane to lift and transport the outrigger.

Claims

1. A bendable bridge erecting machine single-beam structure, comprising at least a single main beam and two guide beams connected to the front and rear ends of the main beam, wherein the main beam and the guide beams can be bent horizontally at a certain angle, characterized in that: The guide beam has a triangular cross-section. The bottom of the guide beam is flush with the bottom of the main beam and a track is provided at the bottom of the guide beam. Two horizontally distributed hinge seats are provided at the end face of the guide beam that connects to the main beam. Two horizontally distributed hinge seats are provided at the front and rear ends of the main beam. The main beam and the two guide beams are hinged together. A horizontal rotation cylinder is provided at the connection between the guide beam and the main beam. The two ends of the horizontal rotation cylinder are connected to the main beam and the guide beam respectively. The bending angle of the main beam and the guide beam is controlled by the extension and retraction of the horizontal rotation cylinder. The main beam is also equipped with cantilever beams at both ends. The cross-section of the cantilever beam is U-shaped. The top of the cantilever beam is flush with the top of the main beam and a crane track is provided on the cantilever beam. The crane track on the cantilever beam is continuously provided with the crane track on the main beam for the crane to travel. The cantilever beam is located above the end of the guide beam, and the position of the cantilever beam does not interfere with the position of the guide beam when it is bent.

2. The bendable bridge erecting machine single beam structure according to claim 1, characterized in that: Four horizontal rotation cylinders are provided, installed in pairs at both ends of the main beam. Two horizontal rotation cylinders are arranged symmetrically on the left and right, and located on the bottom sides of the connection between the guide beam and the main beam. The two ends of the horizontal rotation cylinders are connected to the guide beam and the main beam respectively through ear plates.

3. The bendable bridge erecting machine single beam structure according to claim 1, characterized in that: Mechanical locks for fixing the angle between the guide beam and the main beam are installed at the connection points between them. The two ends of the mechanical locks are connected to the guide beam and the main beam respectively through ear plates.

4. The bendable bridge erecting machine single beam structure according to claim 3, characterized in that: Four mechanical locks are provided, installed in pairs at both ends of the main beam. Two mechanical locks are arranged symmetrically on the left and right, and located above the horizontal rotating cylinder.

5. The bendable bridge erecting machine single beam structure according to claim 1, characterized in that: The two horizontally distributed hinge seats are the upper hinge seat and the lower hinge seat, respectively. The upper hinge seat is located at the end of the top beam in the guide beam, and the lower hinge seat is located at the middle position of the end of the bottom beam in the guide beam.

6. The bendable bridge erecting machine single beam structure according to claim 1, characterized in that: The horizontal bending angle between the main beam and the guide beam is ≤ ±12°.

7. The bendable bridge erecting machine single beam structure according to claim 1, characterized in that: The main beam adopts a steel box girder structure, which is divided into two layers, upper and lower, and connected by flange bolts; the main beam is composed of five segments.

8. The bendable bridge erecting machine single beam structure according to claim 1, characterized in that: The guide beam adopts a triangular truss structure, and a traveling platform is installed on the middle plane of the lower layer of the triangular truss.

9. The bendable bridge erecting machine single beam structure according to claim 1, characterized in that: The cantilever beam is a rectangular truss structure consisting of two web plates on the left and right sides connected by a channel steel in the middle. The root of the cantilever beam is bolted to the web plate of the main beam with a joint plate. The overhead crane track is set above the two web plates on the left and right sides of the cantilever beam.

10. The bendable bridge erecting machine single beam structure according to claim 1, characterized in that: The front end of the cantilever beam is equipped with an upward-protruding wheel stop.

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