A reusable hoisting device and a hoisting method for segmented structures.

Abstract

This invention relates to the field of shipbuilding technology and discloses a reusable hoisting device and a method for hoisting segmented structures. The device includes a base plate and connecting bridge plates. The connecting bridge plates consist of two identical vertical bridge plates, designated as a first vertical bridge plate and a second vertical bridge plate. The first and second vertical bridge plates are fixed to the left and right ends of the base plate, respectively. The front middle section of each vertical bridge plate is recessed downwards, with its height lower than the rear section, forming an approximately L-shape. Each vertical bridge plate has a hoisting hole at its front end. A web plate is provided between the first and second vertical bridge plates at the front of the base plate, and this web plate is welded to the base plate and the vertical bridge plates. Each vertical bridge plate has a rearward-inclined upward-inclined bending support column on its front top edge, with the two bending support columns having the same inclination angle and length. This device increases the segment size, meets the minimum spacing requirement for dual-vehicle tandem hoisting, enables hoisting within the shipyard, accelerates construction progress, and reduces segmented construction costs.

Description

Technical Field

[0001] This invention relates to a hoisting device, specifically to a reusable hoisting device and a hoisting method for segmented structures. Background Technology

[0002] In shipbuilding projects, some key sections (such as the rudder arm section) are difficult to build, require high precision, and have long operation cycles. These sections are usually built in a well-maintained workshop. For sections with large weight, double cranes are generally used to lift the tires in the workshop.

[0003] Due to limitations imposed by equipment and facility parameters such as the crane spacing for tandem cranes, when the segment dimensions are small and the weight is large, the hoisting design may fail to meet the crane spacing requirements for tandem cranes. Generally, when such a segment does not meet the crane lifting capacity but meets the tandem crane spacing requirements, part of the structure can be removed to reduce the segment weight and meet the lifting capacity of the lifting lugs and crane, allowing conventional lifting lugs to be used for hoisting operations. However, if a segment meets the crane lifting capacity but does not meet the tandem crane spacing requirements, the segment must be transferred to an off-site construction site. Summary of the Invention

[0004] This invention provides a reusable hoisting device and a hoisting method for segmented structures, which solves the problem of mismatch between segment dimensions and the required spacing between two-vehicle cranes.

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

[0006] A reusable hoisting device includes a base plate and a connecting bridge plate. The connecting bridge plate comprises two identical vertical bridge plates, designated as a first vertical bridge plate and a second vertical bridge plate. The first and second vertical bridge plates are fixed to the left and right ends of the base plate, respectively. The front middle section of each vertical bridge plate is recessed downwards, with its height lower than the rear section, forming an approximately L-shape. Each vertical bridge plate has a hoisting hole at its front end. A web plate is provided between the first and second vertical bridge plates at the front of the base plate, and the web plate is welded to both the base plate and the vertical bridge plates. Each vertical bridge plate has a rearwardly and upwardly inclined anti-bending support column on its front top edge, with the two anti-bending support columns having the same inclination angle and length.

[0007] Preferably, the lower edge lengths of the first connecting bridge plate and the second connecting bridge plate are the same as the lengths of the left and right edges of the base plate.

[0008] Preferably, the width of the base plate is the same as the structural width of the installation device on the segment, the sum of the length of the base plate and the length of the segment meets the minimum distance between the two vehicles when the two vehicles are hoisted together, and an additional 50mm margin is added on this basis, and the thickness of the base plate is similar to the thickness of the segment structure plate that is butt welded.

[0009] Preferably, the inclination angle between the web plate and the bottom plate is less than 90°.

[0010] Preferably, each of the vertical bridge plates is further provided with a reinforcing ring at the hoisting hole, and the opening size on the reinforcing ring is the same as the size of the hoisting hole.

[0011] Preferably, the bottom ends of the bending support columns are all fixedly connected to the vertical bridge plate through reinforcing wing plates.

[0012] Preferably, the bending support column is made of metal square tubing.

[0013] A method for hoisting a segmented structure, using a reusable hoisting device; two sets of hoisting devices are installed at corresponding positions at the front and rear ends of the segmented structure; the bending support columns of the hoisting devices are lightly welded to the segmented structure; and the hoisting slings of the crane are suspended on the corresponding hoisting holes using a double-vehicle hoisting method to transport the segmented structure to a suitable installation position.

[0014] Compared with the prior art, the advantages of the present invention are:

[0015] This invention provides a reusable hoisting device and a hoisting method for segmented structures. The structure is simple, quick to manufacture and install, and saves construction time. The reusable hoisting device can be regarded as an extension of the segmented structure of a ship, increasing the size of the segment to meet the minimum spacing requirement of the two cranes in a double crane operation, enabling hoisting within the factory building, accelerating the construction progress, and reducing the construction cost of the segments. After the hoisting operation is completed, the hoisting device can be dismantled and reused, reducing the amount of materials used. Attached Figure Description

[0016] Figure 1 This is a structural schematic diagram of a reusable hoisting device and a segmented hoisting method according to the present invention;

[0017] Figure 2 This is a side view of a reusable hoisting device and a hoisting method for a segmented structure according to the present invention;

[0018] Figure 3 This is a schematic diagram illustrating an example of a reusable hoisting device and a hoisting method for a segmented structure according to the present invention;

[0019] In the figure, 1-base plate; 2-first vertical bridge plate; 3-second vertical bridge plate; 4-web plate; 5-reinforcing ring; 6-reinforcing wing plate; 7-bending support column; 8-lifting hole. Detailed Implementation

[0020] The following explanation, in conjunction with the accompanying drawings, will provide further details. Figure 1 and Figure 2As shown, a reusable lifting device includes a base plate 1 and connecting bridge plates. The connecting bridge plates are two identical vertical bridge plates, designated as a first vertical bridge plate 2 and a second vertical bridge plate 3. The first and second vertical bridge plates 3 are fixed to the left and right ends of the base plate 1, respectively. The front section of each vertical bridge plate is recessed downwards, with its height lower than the rear section, forming an approximately L-shape. Each vertical bridge plate has a lifting hole 8 at its front end. A web plate 4 is provided between the first vertical bridge plate 2 and the second vertical bridge plate 3 at the front of the base plate 1. The web plate 4 is welded to the base plate 1 and the vertical bridge plates. Each vertical bridge plate has a backward-inclined upward-inclined anti-bending support column 7 on its front top edge, with the two anti-bending support columns 7 having the same inclination angle and length. The dimensions of the base plate and connecting bridge plates are determined based on the specific structural form and dimensions of each segment, as well as the requirements of the lifting equipment parameters within the factory building where the segment is located. The lower edge lengths of the first vertical bridge plate 2 and the second vertical bridge plate 3 are the same as the left and right edge lengths of the base plate 1. The width of the base plate 1 is the same as the structural width suitable for installing the device on the segment. The sum of the length of the base plate 1 and the segment length must meet the minimum spacing requirement for double-vehicle hoisting, with an additional 50mm margin. The thickness of the base plate 1 is similar to the thickness of the segment structure welded together. The height and thickness need to be selected according to the actual load of the hoisting device to ensure that the strength of the hoisting device meets the requirements under the required load. This mainly ensures the welding strength of the hoisting device and enables its reusability. The web plate 4 is inclined forward and upward at an angle of less than 90° with the base plate 1. Each vertical bridge plate is also provided with a reinforcing ring 5. The opening size on the reinforcing ring 5 is the same as the size of the hoisting hole 8. The thickness of the reinforcing ring 5 is selected according to the actual load of the hoisting device to further increase the local strength of the hoisting device. The hoisting device is installed onto the segmented structure. Based on the specific structural form of each segment, the reinforcing wing plate 6 is used as a support point to install the bending support columns 7 of the hoisting device, further strengthening the tightness of the connection between the hoisting device and the segment. The bottom end of each bending support column 7 is fixedly connected to the vertical bridge plate via the reinforcing wing plate 6. The bending support column 7 is made of metal square tubing.

[0021] A method for hoisting a segmented structure, using a reusable hoisting device; two sets of hoisting devices are installed at corresponding positions at the front and rear ends of the segmented structure; the bending support columns of the hoisting devices are lightly welded to the segmented structure; and the hoisting slings of the crane are suspended on the corresponding hoisting holes using a double-vehicle hoisting method to transport the segmented structure to a suitable installation position.

[0022] Of course, the above description is not intended to limit the present invention, and the present invention is not limited to the examples given above. Any changes, modifications, additions or substitutions made by those skilled in the art within the scope of the present invention should also fall within the protection scope of the present invention.

Claims

1. A method for hoisting a segmented structure, characterized in that, A reusable lifting device is used; the lifting device includes a base plate and a connecting bridge plate, the connecting bridge plate is two identical vertical bridge plates, namely a first vertical bridge plate and a second vertical bridge plate, the first and second vertical bridge plates are fixed to the left and right ends of the base plate respectively, the middle front section of each vertical bridge plate is recessed downward, the height of the middle front section is lower than the height of the rear section, and the whole is approximately L-shaped; the front section of each vertical bridge plate is provided with a lifting hole; a web plate is provided between the first vertical bridge plate and the second vertical bridge plate at the front of the base plate, the web plate is welded to the base plate and each vertical bridge plate, and a bending support column inclined backward and upward is provided on the top edge of the front part of each vertical bridge plate, the two bending support columns have the same inclination angle and length; A set of hoisting devices is installed at corresponding positions at the front and rear ends of the segmented structure. The bending support columns of the hoisting devices are lightly welded to the segmented structure. The hoisting devices are hoisted by two vehicles in a tandem hoisting method, with the crane's slings hanging on the corresponding hoisting holes, and the segmented structure is hoisted to a suitable installation position. The width of the base plate is the same as the width of the installation device on the segmented structure, and the sum of the length of the base plate and the length of the segmented structure satisfies the minimum distance between the two vehicles when the two vehicles are hoisted together. The inclination angle between the web plate and the base plate is less than 90°.

2. The method for hoisting a segmented structure according to claim 1, characterized in that, The lower edge lengths of the first and second vertical bridge plates are the same as the left and right edge lengths of the base plate.

3. The method for hoisting a segmented structure according to claim 1, characterized in that, Each of the vertical bridge plates is also provided with a reinforcing ring at the hoisting hole, and the opening size on the reinforcing ring is the same as the size of the hoisting hole.

4. The method for hoisting a segmented structure according to claim 1, characterized in that, The bottom ends of the bending support columns are all fixedly connected to each vertical bridge plate through reinforcing wing plates.

5. The method for hoisting a segmented structure according to claim 1, characterized in that, All the bending support columns are made of metal square tubing.

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