Auxiliary tool suitable for turning over large steel box girder
By designing auxiliary tooling suitable for large steel box girders, which allows them to roll and turn over on the ground, the problem of traditional lifting equipment being difficult to turn over is solved, and low-cost and high-efficiency turning operations are achieved.
Patent Information
- Application Number
- CN202520598047.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-01
- Publication Date
- 2026-01-27
- Estimated Expiration
- 2035-04-01
AI Technical Summary
Due to their height and weight, large steel box girders are difficult to flip and weld using traditional lifting equipment, especially in the absence of heavy-duty lifting equipment, making their production difficult and costly.
Design an auxiliary tool suitable for turning over large steel box girders. By installing the tool body on the steel box girder and changing its contact method, it can be turned over by rolling on the ground. The turning operation can be completed using equipment with a lifting capacity greater than half of its own weight.
It reduces the manufacturing difficulty and cost of steel box girder turning, saves transportation capacity, has a simple structure and low cost, and is suitable for turning large steel box girder.
Smart Images
Figure CN223836973U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of steel box girder processing technology, and in particular to an auxiliary tooling suitable for turning over large steel box girders. Background Technology
[0002] Large steel box girders are widely used in bridge engineering, water conservancy projects, construction, and maritime transport. As a type of steel structural load-bearing component, large steel box girders are characterized by high load-bearing capacity, good seismic performance, and corrosion resistance.
[0003] A steel box girder is a box-shaped structure formed by welding together an upper flange plate, a web plate, and a lower flange plate. The upper flange plate and web plate, as well as the lower flange plate and web plate, need to be welded together, and the joints between the plates also need to be welded. Because overhead and vertical welding are not permitted for the main welds, the box girder needs to be flipped over as a whole during the welding process to complete the welding work. The traditional method for flipping box girders is to use a crane to lift the girder and perform the flipping operation. The lifting capacity of the crane must be greater than the weight of the box girder to achieve the aerial flipping operation. This method is only suitable for small box girder structures with low height and light weight.
[0004] Large steel box girders are characterized by their height, length, and weight; the girders are over 3 meters high and weigh between 100 and 150 tons. Without heavy-duty lifting equipment, it is very difficult to complete the turning and welding work of the steel box girders. Summary of the Invention
[0005] To address the aforementioned problems, this utility model provides an auxiliary tooling suitable for the overturning of large steel box girders, specifically employing the following technical solution:
[0006] The auxiliary tooling of this utility model, suitable for turning over large steel box girders, is suitable for steel box girders where the web spacing is smaller than the flange width. It includes a tooling body, an arc surface on the outer side of the tooling body, and an installation cavity on the inner side of the tooling body. The installation cavity has a first contact surface that contacts the flange, a second contact surface that contacts the web, and a slot that connects the first contact surface and the second contact surface. The slot is adapted to the extension section of the flange.
[0007] The web is symmetrical about the central axis of the flange.
[0008] The arc surface is symmetrically arranged along the central axis of the flange plate, and the ends of the arc surface are located on both sides of the web plate.
[0009] The end of the arc surface is connected to a straight section, which is arranged parallel to the web.
[0010] The tooling body is welded from steel plates, and the steel plates are provided with reinforcing ribs.
[0011] The tooling body is an integral structural component.
[0012] The tooling body is a two-section structure connected by bolts, and the mating surfaces of the tooling body are symmetrically arranged along the flange plate.
[0013] The auxiliary tooling provided by this utility model, suitable for turning over large steel box girders, has a simple structure, low cost, and is easy to use. After being installed on the steel box girder, it can change the contact mode between the steel box girder and the ground. Therefore, during lifting operations, the previous operation of turning over in the air can be changed to the action of turning over the entire steel box girder by rolling on the ground, thereby saving transportation capacity. The turning operation can be achieved using lifting equipment with a lifting capacity greater than half the self-weight of the steel box girder, which greatly reduces the manufacturing difficulty and cost of the steel box girder. Attached Figure Description
[0014] Figure 1 This is a schematic diagram of the structure of this utility model. Figure 1 .
[0015] Figure 2 yes Figure 1 AA view.
[0016] Figure 3 This is a schematic diagram of the structure of this utility model. Figure 2 .
[0017] Figure 4 yes Figure 3 BB view.
[0018] Figure 5 This is a schematic diagram of the installation structure of this utility model on a steel box girder.
[0019] Figure 6 yes Figure 3 CC cross-section view.
[0020] Figure 7 This is a schematic diagram of the turning process of the steel box girder with the assistance of this utility model. Detailed Implementation
[0021] The embodiments of this utility model will be described in detail below with reference to the accompanying drawings. These embodiments are implemented based on the technical solution of this utility model and provide detailed implementation methods and specific working processes. However, the protection scope of this utility model is not limited to the following embodiments.
[0022] like Figure 1-7 As shown, the auxiliary tooling for turning over large steel box girders described in this utility model is suitable for steel box girders P in which the web plate M is symmetrically arranged about the central axis of the flange plate N, and the spacing between the web plates M is smaller than the width of the flange plate N.
[0023] This utility model includes a tooling body with an installation cavity inside. The installation cavity has a first contact surface 1 that contacts the flange plate N, a second contact surface 2 that contacts the web plate M, and a slot 3 connecting the first contact surface 1 and the second contact surface 2. Each slot 3 is adapted to the flange plate extension section on its corresponding side (i.e., the flange plate N located outside the web plate M). The outer side of the tooling body is configured as an arc surface 4, which is symmetrically arranged along the central axis of the flange plate N, with its ends located on both sides of the web plate M. After the tooling body is installed on the steel box girder P, the flange plates N at both ends of the steel box girder P are surrounded by the outer arc surface 4. Therefore, the steel box girder P with this utility model installed effectively transforms the planar structure at its ends into an arc surface structure, allowing it to roll on the spot upon landing. Preferably, straight sections 5 are connected to both ends of the arc surface 4, and the straight sections 5 are parallel to the web plate M. When the straight section 5 touches the ground, the steel box girder P can stop rolling, which is beneficial for the hoisting equipment to adjust the hoisting point and other operations.
[0024] The aforementioned fixture body is welded from steel plates. To improve structural strength, reinforcing ribs 6 are welded on both sides of the steel plates. Normally, the fixture body is a one-piece structural component. During installation, the mounting cavity is aligned with the steel box girder P, and the fixture is moved from the end of the girder towards the center to the desired position. When the web of the steel box girder P adopts a variable cross-section structure, its lower flange plate N is usually curved. Therefore, the one-piece fixture body cannot be installed by sliding it through the girder. In this case, the fixture body is made into a two-section structure, that is, the fixture body is divided into two parts along the center line of the flange plate N. During use, the two parts are snapped together at the designated position on the lower flange plate N, and high-strength bolts 7 are installed on the joint surface of the two parts for connection and fixation.
[0025] This utility model is used in pairs during operation, with the appropriate number selected based on the beam length. During operation, first, depending on whether the steel box girder P is a variable cross-section structure, select either an integrated or two-section fixture body, and install it at the appropriate position on the beam according to the hoisting plan (see...). Figure 3 Next, the steel box girder P is connected to the lifting equipment (for ease of description, in this embodiment, the tooling body connected to the upper flange plate N is called the upper tooling Z1, and the tooling body connected to the lower flange plate N is called the lower tooling Z2). The steel box girder P is lifted by the lifting equipment, and the lower tooling Z2 is just in contact with the ground. At this time, the lifting equipment provides a turning boost to the steel box girder P, causing the steel box girder P to roll along the ground under the action of the lower tooling Z2. When the girder body has rotated 90° and both the upper tooling Z1 and the lower tooling Z2 are in contact with the ground, the lifting point is adjusted, and the lifting equipment provides another turning boost to the steel box girder P, causing the steel box girder P to continue rolling along the ground by 90° under the action of the upper tooling Z1. At this time, the lower flange plate N is on top, and the upper flange plate N is in contact with the ground, completing the turning of the steel box girder P.
[0026] It should be noted that in the description of this utility model, terms such as "front", "rear", "left", "right", "vertical", "horizontal", "inner", and "outer" indicating orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying 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 limitations on this utility model.
Claims
1. An auxiliary tooling suitable for turning over large steel box girders, suitable for steel box girders where the web spacing is smaller than the flange width, characterized in that: The tooling body includes an outer arc surface and an inner mounting cavity. The mounting cavity has a first contact surface that contacts the flange plate, a second contact surface that contacts the web plate, and a slot that connects the first contact surface and the second contact surface. The slot is adapted to the extension section of the flange plate.
2. The auxiliary tooling suitable for turning over large steel box girders according to claim 1, characterized in that: The web is symmetrical about the central axis of the flange.
3. The auxiliary tooling suitable for turning over large steel box girders according to claim 1, characterized in that: The arc surface is symmetrically arranged along the central axis of the flange plate, and the ends of the arc surface are located on both sides of the web plate.
4. The auxiliary tooling suitable for turning over large steel box girders according to claim 1, characterized in that: The end of the arc surface is connected to a straight section, which is arranged parallel to the web.
5. The auxiliary tooling suitable for turning over large steel box girders according to claim 1, characterized in that: The tooling body is welded from steel plates, and the steel plates are provided with reinforcing ribs.
6. The auxiliary tooling suitable for turning over large steel box girders according to claim 1, characterized in that: The tooling body is an integral structural component.
7. The auxiliary tooling suitable for turning over large steel box girders according to claim 1, characterized in that: The tooling body is a two-section structure connected by bolts, and the mating surfaces of the tooling body are symmetrically arranged along the flange plate.