Lifting appliance and lifting system for steel box girder

Abstract

The utility model relates to the technical field of lifting tools, in particular to a lifting appliance and a lifting system of a steel box girder, the lifting appliance comprises an upper lifting appliance and a lower lifting appliance which are detachably connected with each other, the upper lifting appliance comprises a first vertical plate, the lower lifting appliance comprises a second vertical plate, and the first vertical plate and the second vertical plate are arranged in a mutually orthogonal mode. The lower lifting appliance further comprises a first connecting piece and a second connecting piece, the first connecting piece is connected with the second vertical plate, the first connecting piece is provided with a first connecting face, the second connecting piece is provided with a second connecting face, and the first connecting face and the second connecting face are used for being connected with the two sides of a top plate of the box girder respectively. The device is simple in structure, larger in connection area, better in connection stability and more reliable in hoisting, the size of the hoisting tool can be further reduced, and the construction cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of hoisting tools, in particular to a spreader and a hoisting system for a steel box girder. Background Art

[0002] In the construction of the main span of a cable-stayed bridge, a cable hoisting system is often used to hoist and install the main span structure.

[0003] The suspension points of the traditional cable hoisting system are designed as single suspension points or double suspension points. During the hoisting process of the steel box girder, due to the small number of suspension points, it is difficult to adjust the installation position of the steel box girder, and it is impossible to effectively ensure the installation linearity of the steel box girder of the main span of the cable-stayed bridge. Moreover, the local stress on the steel box girder is too large, and it is easy to deform.

[0004] The spreader of the traditional cable hoisting system is designed too complexly, consisting of many vertical and horizontal crossbeams. The structure is complex, the connection strength between components is not high, and the structural strength and stability are insufficient, resulting in poor hoisting and installation accuracy of the steel box girder. Moreover, the connection strength between the lifting lugs attached to the steel box girder and the steel box girder is not high, which is likely to further exacerbate the deformation of the steel box girder during the hoisting and installation process of the steel box girder. Summary of the Invention

[0005] The purpose of the utility model is to solve the problem that the spreader in the prior art consists of many vertical and horizontal crossbeams and has a complex structure, and to provide a spreader and a hoisting system for a steel box girder.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0007] In the first aspect, the utility model provides a spreader for a steel box girder, which comprises an upper spreader and a lower spreader that are detachably connected to each other. The upper spreader comprises a first vertical plate, and the lower spreader comprises a second vertical plate. The first vertical plate and the second vertical plate are arranged orthogonally to each other. The lower spreader further comprises a first connecting piece and a second connecting piece. The first connecting piece connects the second vertical plate. The first connecting piece has a first connecting surface, and the second connecting piece has a second connecting surface. The first connecting surface and the second connecting surface are respectively used for connecting both sides of the top plate of the box girder.

[0008] Adopting a spreader for a steel box girder according to the present utility model, which is connected by two components, namely an upper spreader and a lower spreader, facilitating on-site installation. Through the first vertical plate and the second vertical plate arranged orthogonally to each other, the spreader has good force-bearing capacity in two directions. Cooperating with the first connection surface and the second connection surface to connect the top plate, the spreader structure is simple. Compared with the existing lifting lugs, the connection area is increased, the connection stability is better, and the hoisting is more reliable. The spreader structure does not need to adopt the layout of a balance beam, and the structure is simple. Moreover, since the length of the balance beam usually adapts to the longitudinal length of the hoisting segment, this structure can further reduce the size of the spreader. The number of lifting points can be increased according to actual needs. Generally speaking, the project cost is reduced.

[0009] Preferably, the second connecting member further has a third connection surface for connecting the diaphragm of the box girder.

[0010] The second connecting member can be made of angle steel, channel steel, square steel, etc. There are connections in two directions between the second connecting member and the steel box girder, which can effectively resist tensile force and shear force, and the connection area is further enlarged, the stress on the steel box girder is small, and the hoisting link is not prone to deformation.

[0011] More preferably, the second connecting member is an L-shaped member.

[0012] More preferably, the second connecting members are provided on both sides of the diaphragm.

[0013] Further improve the stability at the lifting point.

[0014] More preferably, the first connecting member and the second connecting member are connected by high-strength bolts, and the corresponding two second connecting members are also connected by high-strength bolts.

[0015] The spreader design is simple, and the structural strength and stability are high.

[0016] Preferably, two lower spreaders are connected to the upper spreader, the two lower spreaders are symmetrically arranged, and the distance between the two lower spreaders is 150 - 200 mm.

[0017] More preferably, the upper spreader further includes an upper lifting lug for connecting a cable and a lower lifting lug for connecting the second vertical plate. The upper lifting lug and the lower lifting lug are respectively connected to the upper and lower ends of the first vertical plate, and the lower lifting lug is connected to the second vertical plate by a pin shaft.

[0018] More preferably, stiffening ribs are provided on the upper lifting lug, the lower lifting lug, the first vertical plate and the second vertical plate.

[0019] In a second aspect, the present utility model further provides a hoisting system for a steel box girder, including at least four spreaders for a steel box girder as described in any one of the above.

[0020] Adopting a hoisting system for a steel box girder according to the present utility model, with a design of at least four lifting points, the lifting is stable, further reducing the problem of deformation in the hoisting link. It can independently and flexibly adjust the position of each lifting point, thereby ensuring that the installation position of the steel box girder has a small deviation from the design axis, greatly improving the installation accuracy of the steel box girder, ensuring that the linearity of the main span of the cable-stayed bridge meets the requirements, and is particularly suitable for hoisting of box girder stages with more than four lanes and a longitudinal length exceeding 15m.

[0021] Preferably, the spreaders are arranged in a rectangular array, the first vertical plate is arranged along the transverse bridge direction, and the two lower spreaders are respectively arranged on both sides of the middle longitudinal web.

[0022] In summary, due to the adoption of the above technical solutions, the beneficial effects of the present utility model are as follows:

[0023] 1. Adopting a spreader for a steel box girder according to the present utility model, which is connected by two components, namely an upper spreader and a lower spreader, facilitating on-site installation. Through the first vertical plate and the second vertical plate arranged orthogonally to each other, the spreader has good force in two directions. Cooperating with the first connection surface and the second connection surface to connect the top plate, the spreader structure is simple. Compared with the existing lifting lugs, the connection area is increased, the connection stability is better, the hoisting is more reliable, the spreader structure does not need to adopt the layout of a balance beam, the structure is simple, and since the length of the balance beam usually also adapts to the longitudinal length of the hoisting segment, this structure can further reduce the size of the spreader, and the number of lifting points can be increased according to actual needs. Generally speaking, the project cost is reduced.

[0024] 2. Adopting a hoisting system for a steel box girder according to the present utility model, with a design of at least four lifting points, the lifting is stable, further reducing the problem of deformation in the hoisting link. It can independently and flexibly adjust the position of each lifting point, thereby ensuring that the installation position of the steel box girder has a small deviation from the design axis, greatly improving the installation accuracy of the steel box girder, ensuring that the linearity of the main span of the cable-stayed bridge meets the requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a front view structural schematic diagram of a spreader for a steel box girder in Embodiment 1;

[0026] Figure 2 is Figure 1 a side view schematic diagram in;

[0027] Figure 3 is a front view schematic diagram of a spreader for a steel box girder in Embodiment 1 connecting the box girder;

[0028] Figure 4 is Figure 3 a side view schematic diagram of;

[0029] Figure 5It is a schematic layout diagram of the hoisting point positions of a steel box girder hoisting system in Embodiment 2.

[0030] Icon: 11 - First vertical plate; 12 - First vertical plate; 21 - First connecting piece; 22 - Second connecting piece; 31 - Top plate; 32 - Diaphragm; 33 - Middle longitudinal web; 41 - Upper lifting lug; 42 - Lower lifting lug; 5 - Pin shaft; 6 - Stiffening rib. Detailed implementation manners

[0031] The following will describe the present utility model in detail with reference to the accompanying drawings.

[0032] In order to make the objectives, technical solutions and advantages of the present utility model clearer, the present utility model will be further described in detail below in combination with test examples and specific implementation manners. However, this should not be construed as limiting the scope of the above-mentioned subject matter of the present utility model to the following embodiments. All technologies implemented based on the content of the present utility model fall within the scope of the present utility model.

[0033] In the description of the specific embodiments of the present utility model, without special instructions, the expression terms of orientation or positional relationship such as "upper", "lower", "left", "right", "center", "inner", "outer", etc. are all based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship when the utility model product / device / equipment is normally used and placed. These terms of orientation or positional relationship are only for the convenience of describing the solution of the present utility model or simplifying the description in specific embodiments, facilitating technicians to quickly understand the solution, rather than indicating or implying that a specific device / component / element must have a specific orientation or be constructed and operated in a specific positional relationship. Therefore, it cannot be understood as a limitation to the present utility model.

[0034] In addition, if terms such as "horizontal", "vertical", "hanging", "parallel" appear, it does not mean that the corresponding device / component / element is required to be absolutely horizontal or vertical or hanging or parallel, but can be slightly inclined or have a deviation. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined. Or, it can be simply understood that the corresponding device / component / element is arranged in the directions of "horizontal", "vertical", "hanging", "parallel", etc., and can have an error / deviation of ±10% relative to the corresponding direction setting, more preferably within ±8%, more preferably within ±6%, more preferably within ±5%, more preferably within ±4%. As long as the corresponding device / component / element is within the error / deviation range, it can still play its role in the solution of the present utility model.

[0035] In addition, the expressions such as "first", "second", "third", etc. appearing in the terms are only used to distinguish the descriptions of the same or similar components, and should not be understood as emphasizing or implying the relative importance of specific components.

[0036] In addition, in the description of the embodiments of the present utility model, "several", "multiple", and "a number of" represent at least 2. It can be any situation such as 2, 3, 4, 5, 6, 7, 8, 9, etc., and can even be a situation exceeding 9.

[0037] In addition, in the description of the technical solution of the present utility model, unless otherwise clearly specified / defined / restricted, where the terms "set", "installed", "connected", "linked", "provided with", "laid", "arranged" appear, they should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection. It can be common connection means in the art such as welding, riveting, bolting, threaded connection, etc. Such a connection can be a mechanical connection, an electrical connection or a communication connection; it can be directly connected, or indirectly connected through an intermediate medium, and can be the communication inside two components.

[0038] Embodiment 1

[0039] As Figures 1 - 4 As shown, a lifting tool for a steel box girder adopted in this embodiment includes an upper lifting tool and a lower lifting tool that are detachably connected to each other. The upper lifting tool includes a first vertical plate 11, and the lower lifting tool includes a second vertical plate 12. The first vertical plate 11 and the second vertical plate 12 are arranged orthogonally to each other. The lower lifting tool further includes a first connecting member 21 and a second connecting member 22. The first connecting member 21 connects the second vertical plate 12. The first connecting member 21 has a first connecting surface, and the second connecting member 22 has a second connecting surface. The first connecting surface and the second connecting surface are respectively used to connect both sides of the top plate 31 of the box girder.

[0040] The upper lifting tool is used to connect the cable, and the lower lifting tool is used to connect the box girder. Connecting through two components facilitates on-site installation. The upper lifting tool and the lower lifting tool can adopt connection methods in the prior art, such as bolts, pin shafts, etc.

[0041] The upper lifting tool includes a first vertical plate 11, and the lower lifting tool includes a second vertical plate 12. The structures for providing the vertical plates of the upper lifting tool and the lower lifting tool can be the same or different. For example, a vertical plate can be directly adopted, or a vertical plate structure can be provided by using channel steel, square steel, etc.

[0042] The first connecting member 21 and the second connecting member 22 are respectively used to provide a first connecting surface and a second connecting surface, which are used to sandwich both sides of the top plate 31 to provide a larger connecting area and improve the hoisting stability. The first connecting surface and the second connecting surface can be of the same shape and size or different shapes and sizes. The first connecting surface can be a regular shape such as a circle or a rectangle, or an irregular shape, and the same goes for the second connecting surface. The first connecting member 21 can be a flat plate, a channel steel, etc., and the second connecting member 22 can also be a flat plate, a channel steel, etc. The second connecting member 22 also has a third connecting surface, which is used to connect the diaphragm 32 of the box girder. That is, there are two-direction connections between the second connecting member 22 and the steel box girder, namely the planar direction and the vertical direction, which can effectively resist tension and shear force, and the connecting area is further enlarged, the stress on the steel box girder is small, and the hoisting link is not prone to deformation. In an alternative embodiment, the second connecting member 22 can be an angle steel, a channel steel, a square steel, etc., to provide the second connecting surface for connecting the top plate 31 and the third connecting surface for connecting the diaphragm 32.

[0043] In an alternative embodiment, the second connecting member 22 is an L-shaped member, and the second connecting member 22 is provided on both sides of the diaphragm 32, that is, both sides of the diaphragm 32 are clamped by two second connecting members 22, as Figure 2 and 4 shown, further increasing the connecting area and enhancing the stability at the lifting point.

[0044] In an alternative embodiment, the first connecting member 21 and the second connecting member 22 are connected by high-strength bolts, and the corresponding two second connecting members 22 are also connected by high-strength bolts.

[0045] In an alternative embodiment, the upper sling is connected with two lower slings, the two lower slings are symmetrically arranged, and the distance between the two lower slings is 150 - 200 mm. It is convenient to centrally arrange the two lifting points of the same sling at the nodes where the box girder is more stable in force.

[0046] The upper sling further includes an upper lifting ear 41 for connecting the cable and a lower lifting ear 42 for connecting the second vertical plate 12. The upper lifting ear 41 and the lower lifting ear 42 are respectively connected to the upper and lower ends of the first vertical plate 11, and the lower lifting ear 42 is connected to the second vertical plate 12 through a pin shaft 5.

[0047] In an alternative embodiment, the upper lifting ear 41 can be an ear plate with a round hole. The lower lifting ear 42 can have the same structure as the upper lifting ear 41 or a different structure. The upper lifting ear 41 can be integrally formed with the first vertical plate 11 or connected to its upper end, and the same goes for the lower lifting ear 42. The upper lifting ear 41 can be one or more. The lower lifting ear 42 is connected to the second vertical plate 12 through a pin shaft 5, which can be a direct connection or a lifting ear can be provided on the second vertical plate 12 for connection.

[0048] In an alternative embodiment, stiffening ribs 6 may be provided on the upper lifting lug 41, the lower lifting lug 42, the first vertical plate 11, the second vertical plate 12, and the second connecting member 22 to improve the lifting stability.

[0049] The lifting device for a steel box girder described in this embodiment is connected by two components, namely an upper lifting device and a lower lifting device, which facilitates on-site installation. Through the first vertical plate 11 and the second vertical plate 12 arranged orthogonally to each other, the lifting device has good force in two directions. In cooperation with the first connection surface and the second connection surface to connect the top plate, the structure of the lifting device is simple. Compared with the existing lifting lugs, the connection area is increased, the connection stability is better, the lifting is more reliable, and the structure of the lifting device does not need to adopt the layout of a lifting beam, so the structure is simple. And because the length of the lifting beam usually also adapts to the longitudinal length of the hoisting segment, this structure can further reduce the size of the lifting device. The number of lifting points can be increased according to actual needs. Generally speaking, the project cost is reduced.

[0050] Embodiment 2

[0051] A lifting system for a steel box girder adopted in this embodiment includes at least four lifting devices for a steel box girder described in Embodiment 1. As Figure 5 shown, only four lifting devices are arranged as an example, and each lifting device has two lifting point connection positions with the box girder.

[0052] The spacing of the lifting devices in the transverse direction of the bridge and the spacing in the longitudinal direction of the bridge are set according to the actual situation, and the arrangement shape is arranged according to the shape, center of gravity, etc. of the box girder segment to be hoisted.

[0053] The number of lifting devices is an even number, and the lifting devices are arranged in a rectangular array. The first vertical plate 11 is arranged along the transverse direction of the bridge, and the two lower lifting devices in the same lifting device are respectively arranged on both sides of the middle longitudinal web 33.

[0054] In an alternative embodiment, according to needs, the two lower lifting devices in the same lifting device can also be arranged on both sides of the side longitudinal web, for example.

[0055] Adopting the design of at least four lifting points, the lifting is stable, further reducing the problem of deformation in the lifting link. The position of each lifting point can be adjusted independently and flexibly, so as to ensure that the installation position of the steel box girder has a small deviation from the design axis, which can greatly improve the installation accuracy of the steel box girder and ensure that the main span linearity of the cable-stayed bridge meets the requirements.

[0056] The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A hanger for a steel box girder, characterized in that: It comprises an upper sling and a lower sling which are detachably connected to each other, the upper sling comprises a first vertical plate (11), the lower sling comprises a second vertical plate (12), the first vertical plate (11) and the second vertical plate (12) are arranged orthogonally to each other, the lower sling further comprises a first connecting member (21) and a second connecting member (22), the first connecting member (21) is connected to the second vertical plate (12), the first connecting member (21) has a first connecting surface, the second connecting member (22) has a second connecting surface, the first connecting surface and the second connecting surface are respectively used to connect the two sides of the top plate (31) of the box girder.

2. A steel box girder hanger according to claim 1, characterized in that: The second connecting member (22) also has a third connecting surface, and the third connecting surface is used to connect the transverse diaphragm (32) of the box beam.

3. A steel box girder hanger according to claim 2, characterized in that: The second connecting member (22) is an L-shaped member.

4. A steel box girder hanger according to claim 2, characterized in that: The second connecting member (22) is provided on both sides of the transverse partition (32).

5. A steel box girder hanger according to claim 4, characterized in that: The first connecting member (21) and the second connecting member (22) are connected by high-strength bolts, and the corresponding two second connecting members (22) are also connected by high-strength bolts.

6. A steel box girder hanger according to any one of claims 1 to 5, characterized in that: The upper hanger is connected to two lower hangers, the two lower hangers are symmetrically arranged, and the distance between the two lower hangers is 150-200 mm.

7. The steel box girder hanger according to claim 6, characterized in that: The upper lifting device also includes an upper lifting ear (41) for connecting the cable and a lower lifting ear (42) for connecting the second vertical plate (12); the upper lifting ear (41) and the lower lifting ear (42) are respectively connected to the upper and lower ends of the first vertical plate (11); the lower lifting ear (42) is connected to the second vertical plate (12) via a pin shaft (5).

8. The steel box girder hanger according to claim 7, characterized in that: The upper hanging ear (41), the lower hanging ear (42), the first vertical plate (11) and the second vertical plate (12) are all provided with stiffening ribs (6).

9. A steel box girder hoisting system, characterized in that: A lifting device comprising at least four steel box girders as described in any one of claims 1-8.

10. A steel box girder hoisting system according to claim 9, characterized in that: The slings are arranged in a rectangular array, the first vertical plate (11) is arranged along the transverse bridge direction, and the two lower slings are respectively arranged on both sides of the middle longitudinal web (33).

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