Support-free cantilever structure, attachment frame and tower crane

Abstract

The utility model provides a support-free overhanging structure, an attachment frame and a tower crane, the support-free overhanging structure comprises: a diagonal bar, one end of which is used for connecting a bridge; the main cross beam is used for bearing loads transmitted to a bridge by the tower crane, the inclined supporting rod is obliquely arranged relative to the main cross beam, the other end of the inclined supporting rod is connected with the main cross beam, and the main cross beam comprises an upper-layer beam and a lower-layer beam which are oppositely arranged in parallel; the size of the anti-bending-moment surface of the lower-layer beam is larger than that of the anti-bending-moment surface of the upper-layer beam, and a plurality of diagonal web members used for forming a triangular supporting structure are arranged between the upper-layer beam and the lower-layer beam. According to the support-free cantilever structure, the main cross beam with a plurality of triangular supporting structures is matched with the diagonal bars, so that the tower crane can work safely under the condition of no lower support, the support-free cantilever structure can work safely without the lower support structure, and the safety risk is reduced while the mounting efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of engineering machinery, and in particular relates to an unsupported cantilever structure, an attachment frame and a tower crane. Background Art

[0002] In recent years, more and more bridges have been built, and their heights have also been getting higher and higher. As the cross-sectional dimensions of bridges increase with height, the space available for tower crane attachments becomes more and more limited. In order to cope with this situation, when tower cranes are installed on bridge construction, it is usually necessary to install cantilever structures for installing the tower crane's attachment struts. However, as the height increases, the requirements for cantilever structure installation become higher, and the installation becomes more difficult.

[0003] In addition, one attachment may require cantilever structures to be installed on both sides, which further increases the difficulty of installation. Moreover, when the cross-sectional size of the bridge is too small, conventional attachment can no longer be used normally. Figure 1 As shown, the attachment frame structure in the prior art usually requires a cantilever structure with a supporting strut to connect the attachment strut. The supporting strut is located below the attachment plane of the cantilever structure to support the entire cantilever structure. In addition, the longer the supporting strut is, the more difficult it is to install, the lower the assembly efficiency is, and it is easy to have a high safety risk due to unstable assembly. Utility Model Content

[0004] The main purpose of the utility model is to propose an unsupported cantilever structure, an attachment frame and a tower crane, aiming to solve the technical problems of low installation efficiency and high safety risk of the cantilever structure of the tower crane in the prior art.

[0005] In order to achieve the above-mentioned purpose, the utility model provides an unsupported cantilever structure, which includes: a diagonal brace, one end of which is used to connect a bridge; a main beam, which is used to bear the load transmitted to the bridge by a tower crane, the diagonal brace is inclined relative to the main beam, and the other end of the diagonal brace is connected to the main beam, the main beam includes an upper beam and a lower beam that are relatively parallel, the moment-resistant surface size of the lower beam is larger than the moment-resistant surface size of the upper beam, and a plurality of diagonal webs are arranged between the upper beam and the lower beam to form a triangular support structure.

[0006] In an embodiment of the utility model, the main crossbeam includes a docking section and an adjustment section group connected along the beam length direction of the main crossbeam, one of the docking section and the adjustment section group is provided with a male ear plate, and the other is provided with a female ear plate for engaging and welding with the male ear plate.

[0007] In an embodiment of the utility model, the adjustment section group includes at least two connecting transverse sections arranged along the length direction of the beam, and any two adjacent connecting transverse sections are detachably connected.

[0008] In an embodiment of the utility model, a connecting plate is fixed on the connecting transverse section, and two adjacent connecting plates are detachably connected via a plurality of connecting members, and the connecting members are arranged at intervals around the outer circumference of the connecting plates.

[0009] In an embodiment of the utility model, the main cross beam further comprises a handrail rod connected to the diagonal web rod, and the handrail rod is located between the upper beam and the lower beam along the beam height direction of the main cross beam.

[0010] In an embodiment of the utility model, the main cross beam further comprises a footrest rod, and the footrest rod is located between the handrail rod and the lower beam along the beam height direction.

[0011] In an embodiment of the utility model, the main cross beam also includes a support rod located between the upper beam and the lower beam, and the plurality of diagonal web members include an upper diagonal web member and a lower diagonal web member. The upper diagonal web member and the lower beam are connected by the support rod and the lower diagonal web member to form a first triangular support structure, and the lower diagonal web member and the lower beam are connected by the support rod and the upper diagonal web member to form a second triangular support structure.

[0012] In an embodiment of the utility model, the number of the diagonal braces is two and they are arranged opposite to each other along the beam length direction of the main beam, and the two diagonal braces are respectively connected to the two ends of the main beam along the beam length direction.

[0013] The utility model also provides an attachment frame, which comprises an attachment frame, an attachment support rod and the unsupported cantilever structure as described above, wherein the attachment frame is connected to the main crossbeam through the attachment support rod.

[0014] The utility model also provides a tower crane, which comprises the attachment frame as described above.

[0015] Through the above technical solution, the unsupported cantilever structure provided by the embodiment of the utility model has the following beneficial effects:

[0016] The unsupported cantilever structure is composed of a main crossbeam and a diagonal brace, wherein the main crossbeam is divided into an upper beam and a lower beam of two layers, and the upper beam and the lower beam are connected by a plurality of diagonal braces, and a plurality of triangular support structures are formed between the upper beam, the lower beam and the diagonal brace, and the overall triangular truss structure has strong bending resistance and bearing capacity, and the bending moment surface size of the lower beam is larger than the bending moment surface size of the upper beam, which can ensure the bending resistance of the unsupported cantilever structure and make the unsupported cantilever structure stable. The unsupported cantilever structure can be used safely without the support below, and the support structure below can be reduced. The main crossbeam and the diagonal brace are connected by a pin shaft, and the tower crane and the bridge can be connected as a whole, and the structure is firm and stable as a whole. In addition, the cancellation of the support structure below can reduce the installation and disassembly workload, facilitate installation, and simplify positioning. The unsupported cantilever structure and the bridge tower section of the bridge can be installed on the ground in advance and hoisted together as a whole, which is more convenient. The unsupported cantilever structure in the utility model adopts a main beam with multiple triangular support structures and a diagonal brace, which can ensure that the tower crane can work safely without a lower support. The unsupported cantilever structure can work safely without a lower support structure, thereby improving installation efficiency and reducing safety risks.

[0017] Other features and advantages of the present invention will be described in detail in the subsequent specific implementation section. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings are used to provide an understanding of the present invention and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present invention, but do not constitute a limitation to the present invention. In the accompanying drawings:

[0019] Figure 1 It is a schematic diagram of the structure of the attachment frame in the prior art;

[0020] Figure 2 It is a structural schematic diagram of an attachment frame according to an embodiment of the utility model;

[0021] Figure 3 It is a structural schematic diagram of a main beam of an unsupported cantilever structure according to an embodiment of the utility model at a certain viewing angle;

[0022] Figure 4 It is a structural schematic diagram of a main crossbeam of an unsupported cantilever structure according to an embodiment of the utility model from another perspective;

[0023] Figure 5 It is a schematic diagram of the cross-sectional structure of an unsupported cantilever structure according to an embodiment of the utility model;

[0024] Figure 6 is a schematic cross-sectional structure diagram of an unsupported cantilever structure according to another embodiment of the utility model;

[0025] Figure 7 It is a structural schematic diagram of an unsupported cantilever structure according to another embodiment of the utility model;

[0026] Figure 8 It is a schematic diagram of the connection structure between the connection plate and the upper beam in the unsupported cantilever structure according to one embodiment of the utility model;

[0027] Fig. 9 It is a schematic diagram of the connection structure between the connecting plate and the lower beam in the unsupported cantilever structure according to one embodiment of the utility model.

[0028] Description of Reference Numerals

[0029] Label Name Label Name

[0030] 100 Unsupported cantilever structure 2412 Reinforcement

[0031] 1 diagonal support rod 25 handrail

[0032] 2 Main beam 26 Footrest

[0033] 21 Oblique abdominal rod 27 Support rod

[0034] 21a Upper oblique brace 28 butt joint section

[0035] 21b Lower diagonal brace 3 Connector

[0036] 22 Upper beam 200 Attachment frame

[0037] 23 Lower beam 210 Attachment frame

[0038] 24 Adjustment segment group 220 Attachment support rod

[0039] 241 connecting section 300 bridge

[0040] 2411 Connecting plate DETAILED DESCRIPTION

[0041] The specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0042] The unsupported cantilever structure according to the present invention will be described below with reference to the accompanying drawings.

[0043] like Figures 2 to 9As shown, the unsupported cantilever structure 100 includes a diagonal brace 1 and a main beam 2, one end of the diagonal brace 1 is used to connect to the bridge 300; the main beam 2 is used to bear the load transmitted to the bridge 300 by the tower crane, the diagonal brace 1 is inclined relative to the main beam 2, and the other end of the diagonal brace 1 is connected to the main beam 2, the main beam 2 includes an upper beam 22 and a lower beam 23 arranged in parallel, the moment-resistant surface size of the lower beam 23 is larger than the moment-resistant surface size of the upper beam 22, and a plurality of diagonal web members 21 for forming a triangular support structure are arranged between the upper beam 22 and the lower beam 23.

[0044] like Figure 1 As shown, the attachment frame in the prior art is composed of an attachment frame, an attachment strut and a cantilever structure. When the cross-sectional size of the bridge 300 is too small, a cantilever structure with a support strut is required to connect the attachment strut. The unsupported cantilever structure 100 in this embodiment is mainly used for connecting a tower crane and a bridge 300 building. The upper beam 22 can be made of a square tube, and the lower beam 23 can be made of a box beam or an H-shaped steel. The upper beam 22 and the lower beam 23 are connected to two diagonal web members 21 on the same cross section, so that the cross section forms a triangle. The diagonal strut 1 and the main beam 2 can be connected by a pin shaft. The moment resistance surface of the upper beam 22 is Figure 3 The front and rear end surfaces in the figure, the moment-resisting surface of the lower beam 23 is Figure 2 The upper end of the diagonal brace 1 is used to connect the bridge tower section of the bridge 300, and the lower end of the diagonal brace 1 is used to connect the tower crane.

[0045] The unsupported cantilever structure 100 in this embodiment is composed of a main beam 2 and a diagonal brace 1, wherein the main beam 2 is divided into an upper beam 22 and a lower beam 23 in an overall manner, and the upper beam 22 and the lower beam 23 are connected by a plurality of diagonal web members 21, and a plurality of triangular support structures are formed between the upper beam 22, the lower beam 23 and the diagonal web members 21. The overall triangular truss structure has strong bending resistance and bearing capacity, and the bending moment surface size of the lower beam 23 is larger than the bending moment surface size of the upper beam 22, which can ensure the bending resistance of the unsupported cantilever structure 100 and make the unsupported cantilever structure 100 stable. The unsupported cantilever structure 100 can be used safely without support from below, and the support structure from below can be reduced. The main beam 2 and the diagonal brace 1 are connected by a pin shaft, and the tower crane and the bridge 300 can be connected as a whole, and the structure is firm and stable as a whole. In addition, the structure such as Figure 1The support strut structure at the middle and lower part can reduce the workload of installation and disassembly, is convenient to install, and is simple to position. The unsupported cantilever structure 100 and the bridge tower section of the bridge 300 can be installed on the ground in advance and then hoisted together as a whole, which is more convenient. The unsupported cantilever structure 100 in this embodiment uses a main crossbeam 2 with multiple triangular support structures in conjunction with the diagonal strut 1, which can ensure that the tower crane can work safely without the support below. The unsupported cantilever structure 100 can work safely without the support structure below, which improves the installation efficiency while reducing the safety risk.

[0046] In one embodiment, the main crossbeam 2 includes a docking section 28 and an adjustment section group 24 connected along the beam length direction of the main crossbeam 2. One of the docking section 28 and the adjustment section group 24 is provided with a male ear plate, and the other is provided with a female ear plate. The male ear plate is used for clamping and welding with the female ear plate. The main crossbeam 2 in this embodiment is divided into an upper beam 22 and a lower beam 23 along the up and down direction. The beam height direction is the up and down direction. The extension direction of the docking section 28 and the adjustment section group 24 is consistent with the extension direction of the main crossbeam 2. The end of the adjustment section group 24 is provided with a male ear plate or a female ear plate. The positioning clamping between the male ear plate and the female ear plate can facilitate the docking between the adjustment section groups 24. The welding between the male ear plate and the female ear plate can ensure the structural strength of the main crossbeam 2. Figure 3 As shown, male ear plates are provided at both ends of the docking section 28, and two adjustment section groups 24 are connected to the left and right ends of the docking section 28. In other embodiments, the number of the adjustment section group 24 can be one.

[0047] In another embodiment, two adjacent adjustment segment groups 24 can be detachably connected by bolts, which can facilitate disassembly and assembly, thereby improving assembly convenience. The main crossbeam 2 in this embodiment is divided into multiple sections along the beam length direction, which can be easily transported. After being transported to the construction site, it can be assembled in place on site and finally welded.

[0048] It should be noted that if Figure 3 and Figure 4 As shown, the adjustment section group 24 includes at least two connecting transverse sections 241 arranged along the beam length direction, and any two adjacent connecting transverse sections 241 are detachably connected. The number of connecting transverse sections 241 in this embodiment can be set according to actual use requirements. The extension direction of the connecting transverse section 241 is consistent with the extension direction of the main beam 2, and adjacent connecting transverse sections 241 can be detachably connected by bolts.

[0049] like Figure 3 , Figure 4 , Figure 8 and Fig. 9As shown, a connecting plate 2411 is fixed on the connecting transverse section 241, and two adjacent connecting plates 2411 are detachably connected through a plurality of connecting members 3, and the connecting members 3 are arranged at intervals around the outer periphery of the connecting plate 2411. In this embodiment, the connecting members 3 can be bolts, and the connecting plate 2411 can be a flange plate. The connecting plate 2411 can be fixed to the connecting transverse section 241 by welding, and the bolts pass through the connecting plate 2411 for fixing. The outer periphery of the connecting plate 2411 is evenly distributed with bolt holes and reinforcing ribs 2412, which can enhance the connection stability of the connecting plate 2411.

[0050] Specifically, the main cross beam 2 further includes a handrail 25 connected to the diagonal web member 21, and the handrail 25 is located between the upper beam 22 and the lower beam 23 along the beam height direction of the main cross beam 2. The handrail 25 in this embodiment is used for people to walk on the main cross beam 2, and the handrail 25 is connected to the diagonal web member 21 to ensure the installation stability of the handrail 25.

[0051] like Figure 3 As shown, the main cross beam 2 also includes a pedal rod 26, which is located between the handrail rod 25 and the lower beam 23 along the beam height direction. The pedal rod 26 in this embodiment is used to install bolts, and the pedal rod 26 can be set at the connection between the connecting cross sections 241 to provide operating space for the installation personnel.

[0052] like Figure 6 and Figure 7 As shown, in another embodiment, the main cross beam 2 also includes a support rod 27 located between the upper beam 22 and the lower beam 23, and the plurality of diagonal web members 21 include an upper diagonal web member 21a and a lower diagonal web member 21b. The upper diagonal web member 21a and the lower beam 23 are connected by the support rod 27 and the lower diagonal web member 21b to form a first triangular support structure, and the lower diagonal web member 21b and the lower beam 23 are connected by the support rod 27 and the upper diagonal web member 21a to form a second triangular support structure. In this embodiment, the upper beam 22 is a square tube, and the lower beam 23 is a box beam. The upper beam 22 and the lower beam 23 are connected by the support rod 27, the upper diagonal web member 21a, and the lower diagonal web member 21b to form a quadrilateral stable structure with a first triangular support structure and a second triangular support structure.

[0053] like Figure 1 As shown, there are two diagonal braces 1 and they are arranged opposite to each other along the beam length direction of the main beam 2. The two diagonal braces 1 are respectively connected to the two ends of the main beam 2 along the beam length direction. In this embodiment, the two diagonal braces 1 are arranged in mirror symmetry along the beam length direction, which can increase the connection area between the bridge 300 and the unsupported cantilever structure 100, thereby ensuring the structural stability of the unsupported cantilever structure 100.

[0054] The utility model also proposes an attachment frame 200, which includes an attachment frame 210, an attachment strut 220 and the above-mentioned unsupported cantilever structure 100. The attachment frame 210 is connected to the main crossbeam 2 through the attachment strut 220. The specific structure of the unsupported cantilever structure 100 refers to the above-mentioned embodiment. Since the attachment frame 200 adopts all the technical solutions of all the above-mentioned embodiments, it at least has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be repeated here one by one. The attachment frame 200 in this embodiment is composed of the attachment frame 210, the attachment strut 220, and the unsupported cantilever structure 100, which are connected by a pin shaft to form a stable structure.

[0055] The utility model also provides a tower crane, which includes the above attachment frame 200. The specific structure of the attachment frame 200 is referred to the above embodiment. Since the tower crane adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here.

[0056] In the description of the present invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0057] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0058] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0059] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. An unsupported cantilever structure, characterized in that: The unsupported cantilever structure (100) comprises: A diagonal brace (1), one end of which is used to connect to the bridge (300); A main crossbeam (2) is used to bear the load transmitted from a tower crane to a bridge (300); the diagonal brace (1) is arranged obliquely relative to the main crossbeam (2), and the other end of the diagonal brace (1) is connected to the main crossbeam (2); the main crossbeam (2) comprises an upper beam (22) and a lower beam (23) arranged relatively parallel to each other; the moment-resisting surface dimension of the lower beam (23) is larger than the moment-resisting surface dimension of the upper beam (22); and a plurality of diagonal web members (21) for forming a triangular support structure are arranged between the upper beam (22) and the lower beam (23).

2. The unsupported cantilever structure according to claim 1, characterized in that: The main cross beam (2) comprises a docking section (28) and an adjustment section group (24) connected along the beam length direction of the main cross beam (2), one of the docking section (28) and the adjustment section group (24) being provided with a male ear plate, and the other being provided with a female ear plate for engaging and welding with the male ear plate.

3. The unsupported cantilever structure according to claim 2, characterized in that: The adjustment section group (24) comprises at least two connecting transverse sections (241) arranged along the length direction of the beam, and any two adjacent connecting transverse sections (241) are detachably connected.

4. The unsupported cantilever structure according to claim 3, characterized in that: A connecting plate (2411) is fixed on the connecting transverse section (241), and two adjacent connecting plates (2411) are detachably connected via a plurality of connecting members (3), wherein the connecting members (3) are arranged at intervals around the outer circumference of the connecting plates (2411).

5. The unsupported cantilever structure according to any one of claims 1 to 4, characterized in that: The main cross beam (2) further comprises a handrail (25) connected to the diagonal web member (21); the handrail (25) is located between the upper beam (22) and the lower beam (23) along the beam height direction of the main cross beam (2).

6. The unsupported cantilever structure according to claim 5, characterized in that: The main cross beam (2) also includes a footrest rod (26), and the footrest rod (26) is located between the handrail rod (25) and the lower beam (23) along the beam height direction.

7. The unsupported cantilever structure according to any one of claims 1 to 4, characterized in that: The main cross beam (2) further comprises a support rod (27) located between the upper beam (22) and the lower beam (23); the plurality of diagonal web members (21) comprise an upper diagonal web member (21a) and a lower diagonal web member (21b); the upper diagonal web member (21a) and the lower beam (23) are connected via the support rod (27) and the lower diagonal web member (21b) to form a first triangular support structure; the lower diagonal web member (21b) and the lower beam (23) are connected via the support rod (27) and the upper diagonal web member (21a) to form a second triangular support structure.

8. The unsupported cantilever structure according to any one of claims 1 to 4, characterized in that: The number of the diagonal bracing rods (1) is two and they are arranged opposite to each other along the beam length direction of the main beam (2); the two diagonal bracing rods (1) are respectively connected to the two ends of the main beam (2) along the beam length direction.

9. An attachment frame (200), characterized in that: The attachment frame (200) comprises an attachment frame (210), an attachment strut (220), and the unsupported cantilever structure (100) according to any one of claims 1 to 8, wherein the attachment frame (210) is connected to the main beam (2) via the attachment strut (220).

10. A tower crane, characterized in that: The tower crane comprises the attachment frame (200) according to claim 9.

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