Collapsible girder system

Abstract

This invention discloses a foldable main beam system, comprising two structurally identical longitudinal beams. Each longitudinal beam consists of at least two main beam segments connected by hinged joints. Guide beams are provided at both ends of the main beams. Connecting beams are provided on the longitudinal beams, and the connecting beams on the two longitudinal beams are interconnected to form a frame structure for the main beam system. The beneficial effects of this invention are: the main beam segments can be horizontally connected by hinged joints, which can better cope with construction conditions on small-radius curves; the two longitudinal beams are connected by connecting beams to form a frame structure, so that the center of gravity of the main beam system is located between the two longitudinal beams, avoiding the risk of lateral overturning during construction on small-radius curves.

Description

Technical Field

[0001] This invention relates to the field of bridge construction equipment technology, and in particular to a foldable main beam system. Background Technology

[0002] In the context of rapid economic development, roads and bridges play a vital supporting role. Bridge construction technology is booming globally. In recent years, the segmental prefabrication method has been widely used due to its advantages over other methods, such as construction safety, controllable quality, shorter construction period, lower project cost, and less damage to the ecological environment. This method requires prefabricating bridge segments first, and then using a bridge erecting machine to move the segments to the designated location to complete the bridge construction.

[0003] The main beam system is one of the core components of the bridge erecting machine. It needs to bear the weight of the bridge erecting machine during bridge erection. After the bridge erection is completed, it also needs to travel across the span in order to carry out the next bridge erection process. The main beam system currently used by the bridge erecting machine has the following defects: the existing main beam has poor adaptability to the construction of small radius curved bridges, and the main beam segments in the heavy load area cannot achieve relative horizontal rotation. Summary of the Invention

[0004] The purpose of this invention is to propose a foldable main beam system that enables mutual rotation between main beam segments, which can better adapt to the construction of small-radius curved bridges.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A foldable main beam system includes two longitudinal beams with identical structures. Each longitudinal beam consists of a main beam composed of at least two main beam segments connected by hinge joints. Guide beams are provided at both ends of the main beam.

[0007] Preferably, the longitudinal beams are provided with connecting beam segments, and the connecting beam segments on two longitudinal beams are connected to each other to form a connecting beam, so that the main beam system has a frame structure.

[0008] Preferably, the hinge joint includes two sets of hinge blocks, which are respectively disposed on two connected main beam segments. The two sets of hinge blocks are connected by a first pin. Two sets of retractable first driving devices are disposed between the two sets of hinge blocks. One of the two sets of first driving devices extends and the other shortens to realize the relative rotation of the two sets of hinge blocks.

[0009] Preferably, a transition track is provided at the connection point of the two connected main beam segments.

[0010] Preferably, the main beam segment is provided with an opening, and a transverse movement device is rotatably connected to the opening via a second pin. The transverse movement device is provided with a connecting beam segment that can move back and forth.

[0011] Preferably, a retractable second drive device is provided between the connecting beam segment and the lateral movement device, with both ends of the second drive device respectively located on the connecting beam segment and the lateral movement device.

[0012] Preferably, the lateral movement device includes a lateral movement frame, and a lateral movement guide wheel is provided inside the lateral movement frame to contact the side wall of the connecting beam.

[0013] Preferably, the web of the two connected main beam segments is arranged in a concave-convex shape at the connection point.

[0014] Preferably, the connecting beam segments on the two longitudinal beams are detachably connected by bolts.

[0015] The beneficial effects of this invention are as follows:

[0016] 1. The main beam segments can be connected horizontally via hinged joints, which can better handle construction conditions on small-radius curves.

[0017] 2. The two longitudinal beams are connected by a connecting beam to form a frame structure, so that the center of gravity of the main beam system is located between the two longitudinal beams, avoiding the risk of lateral overturning during construction.

[0018] 3. The connecting beams are bolted together and integrated during bridge erection to prevent overturning. When the connecting beams are about to interfere with the piers, they can be opened laterally to avoid the piers and allow the bridge erecting machine to move. The connecting beams are closed in time after passing the piers. Attached Figure Description

[0019] Figure 1 This is a top view of the present invention patent;

[0020] Figure 2 This is a partial top view of the connection between two main beam segments;

[0021] Figure 3 for Figure 2 Front view of the central main beam;

[0022] Figure 4 for Figure 2 The AA section view in the diagram shows the interconnected beam segments.

[0023] Figure 5 for Figure 4 A schematic diagram of the opening of the connecting beam segment;

[0024] Figure 6 for Figure 2 A schematic diagram of the transverse movement device.

[0025] The accompanying drawings are for illustrative purposes only and should not be construed as limiting the scope of this patent. To better illustrate this embodiment, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings. Detailed Implementation

[0026] The invention will now be further described with reference to the accompanying drawings.

[0027] like Figure 1 As shown, an embodiment of the present invention provides a foldable main beam system, comprising two longitudinal beams 110 with identical structures. Each longitudinal beam 110 includes a main beam 102 composed of four main beam segments 121. The main beam segments 121 are connected by hinge joints 103, one of which is located in the heavy-load working area of ​​the main beam. The hinge joints can achieve relative horizontal rotation between the main beam segments 121, so that the alignment of the main beam of the bridge erecting machine and the alignment of the curved beam can match to the greatest extent to meet the requirements of small curve construction. Guide beams 101 are provided at both ends of the main beam 102.

[0028] like Figure 2 As shown, a connecting beam segment 141 is provided on the longitudinal beam 110. The connecting beam segments 141 on the two longitudinal beams 110 are connected to each other to form a connecting beam 104, so that the main beam system has a frame structure. The center of gravity of the frame structure is located between the two longitudinal beams 110, which avoids the risk of lateral overturning of the bridge erecting machine during the construction of small radius curved bridges.

[0029] like Figure 2 and Figure 3 As shown, the hinge joint 103 includes two sets of hinge blocks 131, which are respectively disposed on two connected main beam segments 121. Each set of hinge blocks 131 includes two hinge blocks disposed at the upper and lower ends of the main beam segment 121. The two sets of hinge blocks 131 are connected by a first pin 132, which is disposed at two locations at the upper and lower ends of the main beam segment 121. Two sets of retractable first drive devices 133 are disposed between the two sets of hinge blocks 131. The two ends of the first drive device 133 are respectively disposed at the two hinge blocks 131 connected by the first pin 132. One of the two sets of first drive devices 133 extends and the other shortens to realize the relative rotation of the two sets of hinge blocks 131. The first drive device 133 can be a hydraulic cylinder. By controlling different extension / shortening distances, different bending angles between the main beam segments 121 can be achieved.

[0030] like Figure 2As shown, a transition rail 122 is provided at the connection point of the two connected main beam segments 121. The outer side of the connection point of the two connected main beam segments 121 is a gap, which is connected by the transition rail 122 to form a complete track for the crane to move on the main beam segment 121. The transition rail 122 is connected to the two main beam segments 121 by bolts, so that when the hinge joint rotates relative to each other, the longitudinal track of the crane can be smoothly connected into a whole in a zigzag form. When the hinge joint 103 rotates relative to each other, the transition rail 122 can be replaced at any time according to the different rotation angles. The bolt connection can well meet the strength requirements and replacement needs.

[0031] The main beam section 121 is provided with an opening 123. The opening 123 is connected to the transverse movement device 142 by a second pin 143. The transverse movement device 142 is provided with a reciprocating connecting beam section 141. The transverse movement device 142 rotates within the main beam section 121 to realize the rotation of the connecting beam section 141 relative to the main beam section 121, so as to adapt to the change in horizontal angle between the two when the beam is erected in a curved state and when it travels through the opening.

[0032] A retractable second drive device 146 is provided between the connecting beam segment 141 and the transverse movement device 142. The two ends of the second drive device 146 are respectively provided on the connecting beam segment 141 and the transverse movement device 142. The second drive device 146 can be a hydraulic cylinder. When it extends, it drives the connected connecting beam segment 141 to separate to both sides. When it shortens, it drives the connected connecting beam segment 141 to move towards the center to achieve connection.

[0033] like Figure 6 As shown, the transverse movement device 142 includes a transverse movement frame 144. A transverse movement guide wheel 145 is provided inside the transverse movement frame 144, which contacts the side wall of the connecting beam segment 141. When the connecting beam segment 141 moves within the transverse movement device 142, its movement is limited by the transverse movement guide wheel 145 to prevent skewing. At the same time, it also prevents the side wall of the connecting beam segment 141 from rubbing against the inner wall of the transverse movement frame 144, which would cause wear on the equipment.

[0034] like Figure 3 As shown, the web 124 at the connection of the two connected main beam segments 121 is arranged in a concave-convex shape to meet the requirement of the web transmitting shear force at the hinge joint.

[0035] like Figure 4 and Figure 5 As shown, the connecting beam segments 141 on the two longitudinal beams 110 are detachably connected by bolts. During the bridge construction process, the connecting beam segments 141 and the two longitudinal beams 110 are connected as one unit by bolts. During the journey, the bolts are removed and the connecting beam 104 is opened to avoid interference and collision with the bridge pier.

[0036] When in use, the longitudinal beam 110 can be bent according to the specific working conditions to meet the needs of curved construction. The two longitudinal beams 110 are connected by the connecting beam 104 to form a frame structure, thus avoiding the risk of overturning during construction.

[0037] This embodiment does not impose any limitation on the shape, material, structure, etc. of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention shall fall within the protection scope of the technical solution of the present invention.

[0038] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only used to facilitate the description of this invention and to simplify the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this invention.

[0039] If the terms "first" or "second" are used in this document to define components, those skilled in the art should know that the use of "first" or "second" is merely for the convenience of describing the invention and simplifying the description, and unless otherwise stated, the above terms have no special meaning.

[0040] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. However, these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A foldable main beam system, characterized in that, It includes two longitudinal beams with identical structures. Each longitudinal beam consists of a main beam composed of at least two main beam segments connected by a hinge joint. Guide beams are provided at both ends of the main beam. Connecting beam segments are provided on the longitudinal beams, and the connecting beam segments on two longitudinal beams are connected to each other to form a connecting beam, making the main beam system a frame structure. The hinge joint includes two sets of hinge blocks, which are respectively set on two connected main beam sections. The two sets of hinge blocks are connected by a first pin. Two sets of retractable first driving devices are provided between the two sets of hinge blocks. One of the two sets of first driving devices extends and the other shortens to realize the relative rotation of the two sets of hinge blocks. The main beam section is provided with an opening, and a transverse movement device is rotatably connected to the opening through a second pin. The transverse movement device is provided with a connecting beam section that can move back and forth. A retractable second drive device is provided between the connecting beam segment and the lateral movement device, with its two ends respectively located on the connecting beam segment and the lateral movement device. The webs of the two connected main beam segments are arranged in a concave-convex shape at the connection point.

2. The foldable main beam system according to claim 1, characterized in that, A transition track is provided at the connection point of the two connected main beam sections.

3. The foldable main beam system according to claim 1, characterized in that, The lateral movement device includes a lateral movement frame, and lateral movement guide wheels that contact the side wall of the connecting beam are provided inside the lateral movement frame.

4. A foldable main beam system according to claim 1, characterized in that, The connecting beam segments on the two longitudinal beams are detachably connected by bolts.

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