A crane with a large-span super-long cantilever beam

Abstract

This invention relates to the field of crane technology, specifically to a crane with a large-span, ultra-long cantilever beam, comprising a gantry structure, a traveling mechanism located below the gantry structure, and a tie rod system located above the gantry structure. The gantry structure includes two parallel main beams, each with end beams at both ends. Each main beam has a rigid support leg and a flexible support leg at its lower part. The tie rod system includes two symmetrically distributed tie rod columns. Each tie rod column has a cantilever tie rod and a mid-span tie rod connected to the main beam on both sides. A central column is located between the two tie rod columns. The tie rod system effectively improves the vertical stiffness of the cantilever beam and interacts with the corresponding column connecting beams to improve the horizontal stiffness of the main beam, ultimately enhancing the overall stability and support strength of the gantry structure.

Description

Technical Field

[0001] This invention relates to the field of crane technology, and more specifically to a crane with a long-span, ultra-long cantilever beam. Background Technology

[0002] Current technologies for addressing excessive deflection in ultra-long cantilever beams often involve increasing the beam's cross-section to reduce deflection. However, due to the limitations of the cantilever structure's stress and physical properties, simply increasing the cross-section yields limited deflection reduction. Furthermore, once the cross-section is increased to a certain extent, the beam's own weight causes significant deflection, potentially having the opposite effect and failing to reduce deflection. For this reason, cranes with cantilever structures often have excessively large main beam cross-sections, leading to substantial material waste and higher costs.

[0003] Existing technologies, or methods involving adding internal structures to the beam cross-section, can reduce the deflection of cantilever beams to some extent. However, this increases the manufacturing cost of cantilever beams, complicates the process, and increases manpower and material costs. Furthermore, many ideas remain at the experimental and hypothetical stage, making them difficult to implement in practical engineering. Summary of the Invention

[0004] To address the aforementioned issues, this invention provides a crane with a large-span, ultra-long cantilever beam. Through a tie rod system, the support strength of the entire gantry structure can be effectively improved. The central column can increase the stability of the auxiliary tie rods and the horizontal stiffness of the main beam. Compared with existing frame-type tie rod systems, the overall structure is simple, easy to apply and operate on-site, and can also reduce equipment manufacturing costs.

[0005] To achieve the above objectives, the present invention employs the following technical solution: A crane with a large-span, ultra-long cantilever beam includes a gantry structure. A traveling mechanism is provided below the gantry structure, and a tie rod system is provided above the gantry structure. The gantry structure includes two parallel main beams, each with end beams at both ends. Each main beam has a rigid leg and a flexible leg at its lower part, with a lower crossbeam between each pair of rigid and flexible legs. The tie rod system includes two symmetrically distributed tie rod columns. Each tie rod column has a cantilever tie rod and a mid-span tie rod connected to the main beam on both sides. A central column for connecting the mid-span tie rod is provided between the two tie rod columns.

[0006] As a further improvement to the above technical solution:

[0007] On both sides of the central column, there are short tie rods at mid-span that are connected to the main beam. The two short tie rods at mid-span are located on the extension lines of the two long tie rods at mid-span.

[0008] The height of the central column is less than the height of the tie rod column.

[0009] There are two tie rod systems, which are symmetrically installed above the two main beams. A connecting beam is provided between the tie rod columns and the central column in both tie rod systems.

[0010] The two tie rod columns are respectively installed on the centerline extension line above the rigid leg and the flexible leg.

[0011] The upper part of the rigid support leg is fixedly connected to the main beam, and the upper part of the flexible support leg is hinged to the main beam.

[0012] The upper part of the flexible support leg is provided with a hinge seat one, and the lower part of the main beam is provided with a hinge seat two. Both the hinge seat one and the hinge seat two are provided with hinge plates, and the middle of the two hinge plates are connected by a hinge shaft.

[0013] The main beam is equipped with multiple tie plates for connecting the cantilever tie rod and the mid-span tie rod.

[0014] The walking mechanism includes a set of walking wheels located below the rigid support legs and the flexible support legs, respectively.

[0015] The beneficial effects of this invention are as follows: The crane with a large span and ultra-long cantilever beam includes a gantry structure. A traveling mechanism is provided below the gantry structure, and a tie rod system is provided above the gantry structure. The gantry structure includes two parallel main beams, with end beams at both ends of the two main beams. Rigid legs and flexible legs are provided at the bottom of each main beam, and a lower crossbeam is provided between the corresponding two rigid legs and flexible legs. The tie rod system includes two symmetrically distributed tie rod columns. A cantilever tie rod and a mid-span tie rod are respectively provided on both sides of each tie rod column, which are connected to the main beam. A central column is provided between the two tie rod columns to connect the mid-span tie rod. The tie rod system can effectively improve the vertical stiffness of the cantilever beam. By interacting with the corresponding column connecting beam, the horizontal stiffness of the main beam can be improved, ultimately achieving the purpose of improving the overall stability and support strength of the gantry structure. The use of a central column can increase the stability of the auxiliary tie rods and the horizontal stiffness of the main beam. Compared with the existing frame-type tie rod system, the overall structure is simple, easy to apply and operate on site, and can also reduce equipment manufacturing costs. There is a height difference between the central column and the tie rod columns on both sides. At the same time, short tie rods are set on both sides of the central column, located on the extension line of the long tie rod in the middle span. They are spliced ​​with the long tie rod in the middle span to replace the conventional single tie rod. By reducing the length of the tie rod, the tension is distributed, thereby improving the service life and stability of the tie rod. At the same time, the splicing method also reduces the difficulty of on-site installation, facilitates implementation and later maintenance. In particular, during maintenance, it can be dismantled in stages and sections, which greatly reduces costs compared to dismantling the whole rod. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 for Figure 1 Enlarged structural diagram at point A; Figure 3 This is a schematic diagram of the tie rod system structure in this invention.

[0017] In the diagram: 1. Main beam; 2. End beam; 3. Rigid support leg; 4. Flexible support leg; 5. Lower crossbeam; 6. Tie rod column; 7. Cantilever tie rod; 8. Mid-span long tie rod; 9. Central column; 10. Mid-span short tie rod; 11. Connecting beam; 12. Hinge seat one; 13. Hinge seat two; 14. Hinge plate; 15. Hinge shaft; 16. Tie plate; 17. Traveling wheel set. Detailed Implementation

[0018] Preferred embodiments of the present invention will now be described with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0019] like Figure 1-3 As shown, the crane with a large span and ultra-long cantilever beam in this embodiment includes a gantry structure. A traveling mechanism is provided below the gantry structure, and a tie rod system is provided above the gantry structure. The gantry structure includes two parallel main beams 1. End beams 2 are provided at both ends of the two main beams 1. The end beams 2 are connected to the main beams 1 by flange bolts for easy assembly and transportation. Rigid legs 3 and flexible legs 4 are provided at the bottom of each main beam 1. The two corresponding rigid legs 3 and flexible legs 4 below the two main beams 1 are connected by flange bolts to a lower crossbeam 5 for easy assembly and transportation.

[0020] The tie rod system includes two symmetrically distributed tie rod columns 6. The tie rod columns 6 adopt a box-shaped structure spliced ​​with steel pipes, and the bottom is connected to the main beam 1 by flange bolts. The two sides of each tie rod column 6 are connected to the cantilever tie rod 7 and the mid-span tie rod 8 by pins respectively. A central column 9 is set between the two tie rod columns 6 to fix the end of the mid-span tie rod 8. The top of the central column 9 is hinged to the mid-span tie rod 8, and the bottom is connected to the main beam 1 by flange bolts.

[0021] Two short tie rods 10 connected to the main beam 1 are respectively installed on both sides of the central column 9. The two short tie rods 10 are located on the extension lines of the two long tie rods 8. The two tie rod columns 6 are respectively set on the extension lines of the flexible leg 4 and the rigid leg 3. One end of the short tie rod 10 is hinged to the central column 9, and the other end is hinged to the tie plate 16 on the main beam 1. Through the synergistic effect of the long tie rod 8 and the short tie rod 10, multi-point support is formed at the mid-span of the main beam 1, which effectively suppresses the mid-span deflection of the main beam 1 and improves the horizontal stiffness of the overall portal frame structure. Compared with the traditional single mid-span tie rod, the combination of the long tie rod 8 and the short tie rod 10 forms a new mid-span tie rod system, which can effectively reduce the length of the tie rod, improve the stability of the tie rod, and reduce the difficulty of the tie rod during installation. On both sides of the central column are short tie rods located on the extension line of the long tie rod. These short tie rods are spliced ​​with the long tie rod to replace the conventional single tie rod. By reducing the length of the tie rod, the tension is distributed, thereby extending the service life of the tie rod. At the same time, the splicing method also reduces the difficulty of on-site installation, making it easier to implement and maintain later. In particular, during maintenance, it can be dismantled in stages and sections. Compared with dismantling the whole rod, it can greatly reduce the amount of auxiliary cables used and improve work efficiency.

[0022] The height of the central column 9 is less than the height of the tie rod column 6. In this embodiment, the height of the central column 9 is 1 / 2 to 2 / 3 of the height of the tie rod column 6, so that the mid-span long tie rod 8 and the mid-span short tie rod 10 form a reasonable force angle, ensuring that the support force of the tie rod system on the main beam 1 is evenly distributed and avoiding local stress concentration.

[0023] There are two tie rod systems, which are symmetrically installed above the two main beams 1. A connecting beam 11 is provided between the tie rod column 6 and the center column 9 in the two tie rod systems. The beam 11 is set perpendicular to the tie rod column 6 and the center column 9 to connect the two tie rod systems into a whole, improve the anti-lateral displacement and anti-torsion capacity of the tie rod system, and ensure the stability of the crane under complex working conditions.

[0024] Two tie rod columns 6 are respectively set on the centerline extension line above the rigid leg 3 and the flexible leg 4, so that the load borne by the tie rod column 6 can be directly transferred to the leg below, reducing the direct force on the main beam 1, thereby improving the service life of the main beam, reducing the force transmission loss, and ensuring the force symmetry of the portal frame structure to prevent the main beam 1 from tilting.

[0025] The upper part of the rigid support leg 3 is connected to the main beam 1 by flange high-strength bolts, which facilitates disassembly and transportation, ensures a firm connection, and can withstand large vertical and horizontal loads. The upper part of the flexible support leg 4 is hinged to the main beam 1. Specifically, the upper part of the flexible support leg 4 is welded with a hinge seat 12, and the lower part of the main beam 1 is welded with a hinge seat 13. Both hinge seats 12 and 13 are welded with hinge plates 14. The middle of the two hinge plates 14 is connected by a hinge shaft 15. This hinge structure can adapt to the bending deformation of the main beam 1 during the stress process, avoid stress concentration at the connection between the flexible support leg 4 and the main beam 1, and extend the service life of the structure. Meanwhile, the hinged connection between the flexible outrigger and the main beam can effectively eliminate the impact of mid-span loads or cantilever loads on the flexible outrigger, release stress, reduce stress concentration caused by rigid flange connections, and further reduce the weight of the main beam.

[0026] Multiple tie plates 16 are welded to the secondary web of the main beam 1 to connect the cantilever tie rod 7 and the mid-span tie rod 8. The tie plates 16 have connection holes. The ends of the cantilever tie rod 7 and the mid-span tie rod 8 are connected to the tie plates 16 by pins. The tie plates 16 can not only accurately position the tie rods, but also increase the contact area between the tie rods and the main beam 1, reducing local stress.

[0027] The traveling mechanism includes a traveling wheel set 17 located below the rigid outrigger 3 and the flexible outrigger 4 respectively. The traveling wheel set 17 is connected to the lower crossbeam. The traveling wheel set 17 uses forged steel wheels, which are connected to the rails in a rolling manner. The traveling wheel set 17 is connected to the rails by high-strength bolts to lock the flanges together. The traveling wheel set 17 can be equipped with a drive motor to realize the automatic movement of the crane and improve the operating efficiency.

[0028] It should be noted that in the description of this invention, terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," which indicate direction or positional relationships, are based on the direction or positional relationships shown in the accompanying drawings. These are used merely for ease of description and do not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0029] Furthermore, it should be noted that, in the description of this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0030] The term "comprising" or any other similar term is intended to cover non-exclusive inclusion, such that a process, article, or apparatus / device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to those processes, articles, or apparatus / devices.

[0031] The technical solution of the present invention has been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after such changes or substitutions will all fall within the scope of protection of the present invention.

Claims

1. A crane with a large-span, ultra-long cantilever beam, characterized in that, It includes a gantry structure, with a traveling mechanism installed below the gantry structure and a tie rod system installed above the gantry structure; The gantry structure includes two parallel main beams (1), with end beams (2) at both ends of the two main beams (1). Each main beam (1) has a rigid leg (3) and a flexible leg (4) at its lower part, and a lower crossbeam (5) is provided between the corresponding two rigid legs (3) and flexible legs (4). The tie rod system includes two symmetrically distributed tie rod columns (6). Each tie rod column (6) has a cantilever tie rod (7) and a mid-span tie rod (8) connected to the main beam (1) on both sides. A central column (9) is provided between the two tie rod columns (6) to connect the mid-span tie rod (8).

2. The crane with a large-span, ultra-long cantilever beam according to claim 1, characterized in that, The central column (9) is provided with short tie rods (10) on both sides that are connected to the main beam (1), and the two short tie rods (10) are located on the extension lines of the two long tie rods (8).

3. The crane with a large-span, ultra-long cantilever beam according to claim 2, characterized in that, The height of the central column (9) is less than the height of the tie rod column (6).

4. The crane with a large-span, ultra-long cantilever beam according to any one of claims 1-3, characterized in that, The tie rod system consists of two components, which are symmetrically installed above the two main beams (1). A connecting beam (11) is provided between the tie rod column (6) and the central column (9) in both tie rod systems.

5. The crane with a large-span, ultra-long cantilever beam according to claim 4, characterized in that, The two tie rod columns (6) are respectively set on the centerline extension line above the rigid leg (3) and the flexible leg (4).

6. The crane with a large-span, ultra-long cantilever beam according to claim 1, characterized in that, The upper part of the rigid support leg (3) is fixedly connected to the main beam (1), and the upper part of the flexible support leg (4) is hinged to the main beam (1).

7. The crane with a large-span, ultra-long cantilever beam according to claim 6, characterized in that, The upper part of the flexible support leg (4) is provided with a hinge seat one (12), and the lower part of the main beam (1) is provided with a hinge seat two (13). Both the hinge seat one (12) and the hinge seat two (13) are provided with hinge plates (14), and the middle parts of the two hinge plates (14) are connected by a hinge shaft (15).

8. The crane with a large-span, ultra-long cantilever beam according to claim 1, characterized in that, The main beam (1) is provided with multiple tie plates (16) for connecting the cantilever tie rod (7) and the mid-span tie rod (8).

9. The crane with a large-span, ultra-long cantilever beam according to claim 1, characterized in that, The walking mechanism includes a set of walking wheels (17) located below the rigid support leg (3) and the flexible support leg (4), respectively.

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