Special-shaped eccentric segmented turnover hoisting device and method

Abstract

The invention discloses a special-shaped eccentric segmented turnover hoisting device and method, and relates to the technical field of ship construction. The device comprises a guide main plate, baffles and a cover plate, wherein the baffles are arranged on the two sides of the guide main plate; the cover plate is arranged on the top of the guide main plate and located between the two baffles, and a hanging ring eye plate is arranged on the top face of the cover plate. The guide main plate is integrally formed by a bent plate and a bottom plate, a plurality of reinforcing toggle plates are arranged on the inner side of the bent plate, a reinforcing vertical plate is arranged along the center line of the bottom plate, and the reinforcing toggle plates and the reinforcing vertical plate are both used for enhancing the overall structural strength of the device; a hoisting hole used for being connected with a steel wire rope for hoisting is formed in the area, extending out of the guide main plate, of the edge of the front end of the baffle, and an auxiliary hole is further formed in the center of the baffle. The problem that a large amount of welding operation needs to be carried out during special-shaped eccentric subsection turnover hoisting construction is solved, the device can be repeatedly used, and the operation difficulty and cost of special-shaped eccentric subsection turnover hoisting construction are effectively reduced.

Description

Technical Field

[0001] This invention relates to the field of shipbuilding technology, specifically to a device and method for lifting and turning irregularly shaped eccentric sections. Background Technology

[0002] Shipbuilding sometimes involves special structural forms, such as irregularly shaped eccentric sections with large curvature, the most typical of which is the stern shaft section. The stern shaft section typically uses the bow transverse bulkhead as its construction base, requiring a 90° tilt for assembly during the overall hoisting process. Due to its large curvature, significant weight, and off-center center of gravity, coupled with the presence of special components such as the stern ball cast steel and fairings that affect hoisting, the tilting and hoisting scheme for irregularly shaped eccentric sections becomes a key focus and challenge during construction.

[0003] Currently, the common practice for tilting and lifting stern shaft sections involves welding a specially designed, one-time, large-tonnage lifting device onto the stern bulb cast steel component. This lifting device is then extensively welded to the stern bulb cast steel component, and the lifting device is removed after the stern shaft section tilting and lifting is completed. However, using a large-tonnage lifting device for tilting and lifting stern shaft sections presents the following problems: First, a large amount of welding work is required when installing the hoisting device on the stern ball cast steel component; Because the welding method for stern ball cast steel parts differs from conventional welding methods, and because they have a higher carbon content and alloying elements, they possess higher strength and hardness, but also a higher tendency to be brittle. Welding stern ball cast steel parts involves numerous and challenging tasks, requiring heat treatment before and after welding. The selection of welding methods and the setting of welding parameters are highly demanding. Furthermore, improper operation during welding can easily lead to welding cracks in the stern ball cast steel parts, damaging their inherent structure.

[0004] Second, the cost of hoisting and turning over the structure is relatively high; Because the stern shaft section is quite heavy, the lifting equipment used during hoisting and turning requires a large load and high structural strength. Considering the large amount of steel plates used in the fabrication of the lifting equipment, and that the lifting equipment needs to be custom-made according to the specific structural form of the stern shaft section and cannot be reused, the construction cost is high.

[0005] Therefore, there is an urgent need to propose a device and method for the tilting and hoisting of irregularly shaped eccentric segments to reduce the construction cost and difficulty of tilting and hoisting stern shaft segments, and to provide technical support for the tilting and hoisting of irregularly shaped eccentric segments. Summary of the Invention

[0006] To address the aforementioned technical problems, this invention provides an irregular eccentric segmented tilting and hoisting device and method, which solves the problem of requiring a large amount of welding work during the construction of irregular eccentric segmented tilting and hoisting, and is reusable, significantly reducing the construction cost of irregular eccentric segmented tilting and hoisting.

[0007] The technical solution adopted in this invention is: An irregularly shaped eccentric segmented tilting and hoisting device includes a guide main plate, a baffle plate, and a cover plate; The guide main board is provided with baffles on both sides, and the baffles are fixedly connected to the guide main board. The baffles are provided with process holes and lifting holes. The cover plate is located on top of the guide main plate and between the two baffles, and the top surface of the cover plate is provided with a lifting eye plate.

[0008] Preferably, the guide plate is composed of a bending plate and a base plate, wherein the bending plate and the base plate are integrally formed.

[0009] Preferably, the inner side of the bending plate is provided with a plurality of reinforcing elbows, which are vertically fixed to the base plate and whose edges are in line with the bending plate to support the bending plate.

[0010] Preferably, the reinforcing upright is arranged along the center line of the guide main plate and is located between the top plate and the bottom plate. The reinforcing upright is fixedly connected to the top plate and the bottom plate of the guide main plate respectively, and is used to support the top plate.

[0011] Preferably, the process hole is located at the middle position of the baffle.

[0012] Preferably, the front edge of the baffle protrudes from the area of ​​the guide main board and has a hoisting hole for fixing the wire rope for hoisting.

[0013] Preferably, the irregularly shaped eccentric segmented turning and hoisting device is reusable.

[0014] A method for lifting and turning irregularly shaped eccentric segmented structures, employing the irregularly shaped eccentric segmented lifting and turning device described above, specifically includes the following: Fix the wire rope to the lifting hole on the irregular eccentric segment tilting and lifting device, lift the irregular eccentric segment tilting and lifting device, install the irregular eccentric segment tilting and lifting device on the irregular eccentric segment, use multiple process plates to fix the irregular eccentric segment tilting and lifting device to the irregular eccentric segment, install the irregular eccentric segment tilting and lifting device on the irregular eccentric segment, after the irregular eccentric segment is lifted, fix the wire rope to the lifting eye plate on the cover plate, cut off the process plate, and remove the irregular eccentric segment tilting and lifting device.

[0015] Preferably, the irregularly shaped eccentric segment is a stern shaft segment.

[0016] The beneficial effects of this invention are as follows: (1) This invention proposes an irregular eccentric segmented turning and hoisting device and method. By analyzing the stress situation during the stern shaft segmented turning and hoisting construction, the irregular eccentric segmented turning and hoisting device is designed as a box-shaped structure. The device structure is tightly connected and has high strength. Under stress, the irregular eccentric segmented turning and hoisting device and the irregular eccentric segment form a self-locking structure, which will not slip or fall off, effectively ensuring the safety of the irregular eccentric segmented turning and hoisting construction.

[0017] (2) This invention proposes an irregular eccentric segmented turning and hoisting device and method, which solves the problem of needing a lot of welding work during the irregular eccentric segmented turning and hoisting construction, reduces the construction difficulty of irregular eccentric segments, is easy to manufacture and install, and effectively avoids the risk of welding cracks during the irregular eccentric segmented turning and hoisting construction.

[0018] (3) The present invention proposes an irregular eccentric segmented turning and hoisting device and method, which is convenient to manufacture and install and can be reused. It does not require the manufacture and installation of large-scale tonnage special lifting lugs on the stern ball. After the irregular eccentric segmented turning and hoisting construction is completed, the irregular eccentric segmented turning and hoisting device can be disassembled and reused repeatedly, which reduces the construction cost of irregular eccentric segmented turning and hoisting. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the irregular eccentric segmented turning and hoisting device of the present invention.

[0020] Figure 2 This is a top view of the irregular eccentric segmented turning and hoisting device of the present invention.

[0021] Figure 3 This is a front view of the irregular eccentric segmented turning and hoisting device of the present invention.

[0022] Figure 4 This is a cross-sectional view along line AA of the irregular eccentric segmented turning and hoisting device of the present invention.

[0023] Figure 5 This is a cross-sectional view along BB of the irregular eccentric segmented turning and hoisting device of the present invention.

[0024] Figure 6 This is a cross-sectional view along CC of the irregular eccentric segmented turning and hoisting device of the present invention.

[0025] Figure 7 This is a schematic diagram of the irregular eccentric segmented turning and hoisting device of the present invention applied during hoisting construction.

[0026] Figure 8 This is a schematic diagram of the sealing of the irregular eccentric segmented turning and hoisting device and the stern shaft segment of the present invention.

[0027] Figure 9 This is a cross-sectional view of the irregular eccentric segmented turning and hoisting device of the present invention and the stern shaft segmented sealing along the DD line.

[0028] In the diagram: 1. Baffle, 101. Lifting hole, 102. Process hole, 2. Reinforcing upright plate, 3. Guide main plate, 4. Cover plate, 5. Reinforcing elbow plate, 6. Lifting eye plate, 7. Wire rope, 8. Irregular eccentric segment, 801. Flow guide, 802. Stern ball cast steel part, 9. Irregular eccentric segment turning and lifting device, 10. Process plate. Detailed Implementation

[0029] This invention provides an irregularly shaped, eccentric, segmented tilting and hoisting device and method. To make the objectives, technical solutions, and effects of this invention clearer and more explicit, the invention is further described in detail below. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0030] The present invention will now be described in detail with reference to the accompanying drawings: Example 1 This embodiment proposes a reusable irregularly shaped eccentric segmented turning and hoisting device, such as... Figures 1-3 As shown, it includes a guide main board 3, a baffle 1, and a cover plate 4.

[0031] The guide main board 3 is provided with baffles 1 on both sides and a cover plate 4 on the top of the guide main board 3. The cover plate is located between the two baffles and the baffles and the cover plate are fixedly connected to the guide main board.

[0032] Furthermore, the guide plate 3 is composed of a bending plate and a base plate, such as... Figure 4 As shown, the bending plate has an arc-shaped structure, and at the junction with the wire rope, it is used to prevent the wire rope from breaking when it comes into contact with the irregularly shaped eccentric segmented turning hoisting device during hoisting operations. The bending plate is integrally formed with the base plate. Two reinforcing elbows 5 are provided on the inner side of the bending plate, such as... Figure 5 As shown, the reinforcing elbow plate is vertically fixed to the base plate, and the edge of the reinforcing elbow plate is aligned with the line of the bent plate to support the bent plate and enhance the overall structural strength of the irregularly shaped eccentric segmented turning and hoisting device. A reinforcing vertical plate 2 is provided on the base plate, as shown... Figure 6 As shown, the reinforcing upright plate is installed along the centerline of the guide main plate, located between the top plate and the bottom plate, to support the top plate and strengthen the local structural strength at the contact point between the irregularly shaped eccentric segmented turning and hoisting device and the wire rope. The reinforcing elbow plate and the reinforcing upright plate are welded to the guide main plate and the top plate, respectively.

[0033] Meanwhile, to prevent the wire rope 7 from contacting the guide shroud 801 on the irregular eccentric segment 8 during the lifting and turning process, which could cause deformation of the guide shroud and wear of the wire rope, the length of the guide main board is set to be greater than the distance by which the guide shroud protrudes from the irregular eccentric segment. To prevent the coverage area of ​​the irregular eccentric segment lifting and turning device from being less than the width of the wire rope used for lifting, the width of the guide main board is set to be greater than the width of the crane and the multiple wire ropes connecting the irregular eccentric segment when they are parallel.

[0034] Furthermore, the front edge of the baffle protrudes from the guide plate, and a lifting hole 101 is provided in the protruding area of ​​the front edge of the baffle for hoisting and assembling the irregular eccentric segment tilting and lifting device onto the irregular eccentric segment. To prevent the wire rope from slipping out of the irregular eccentric segment tilting and lifting device during the hoisting process, the protrusion distance of the front edge of the baffle is set according to the design parameters of the wire rope used in the irregular eccentric segment tilting and lifting, so that the protrusion distance of the front edge of the baffle is greater than the diameter of the wire rope. At the same time, a process hole 102 is opened in the middle of the baffle to reduce the overall weight of the irregular eccentric segment tilting and lifting device, while also allowing observation of the installation and use of the irregular eccentric segment tilting and lifting device.

[0035] Furthermore, the top surface of the cover plate is provided with a lifting eye plate 6, which is used to separate the irregular eccentric segment turning and lifting device from the irregular eccentric segment after the irregular eccentric segment has been turned over.

[0036] Example 2 This embodiment proposes a method for lifting and hoisting irregularly shaped eccentric segmented sections. It employs the irregularly shaped eccentric segmented lifting and hoisting device described in Embodiment 1, along with steel wire rope 7, to lift the irregularly shaped eccentric segments. This embodiment takes the stern shaft segment as an example to describe in detail the application of the irregularly shaped eccentric segmented lifting and hoisting device in the stern shaft segment lifting construction. Figure 7 As shown, the specific content is as follows: Fix the wire rope 7 to the lifting hole on the eccentric segmented tilting and lifting device 9, lift the eccentric segmented tilting and lifting device, and install it on the stern shaft section. Based on the actual fit between the eccentric segmented tilting and lifting device and the stern shaft section, make appropriate adjustments to the tilting and lifting device to strengthen the tightness of the fit. Figure 8 and Figure 9 As shown, three process plates 10 are used to seal the irregular eccentric segmented turning and hoisting device with the stern ball cast steel part 802 of the stern shaft segment. After the stern shaft segment is hoisted, the wire rope is fixed to the lifting eye plate on the cover plate, the process plates are cut off, and the irregular eccentric segmented turning and hoisting device is removed.

[0037] In this embodiment, after the stern shaft is hoisted in sections, the dismantled irregular eccentric section turning hoisting device can be reused, which reduces the amount of materials used in the irregular eccentric section hoisting construction, lowers the construction cost of the irregular eccentric section hoisting construction, and significantly shortens the hoisting construction time.

[0038] 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 non-circular, eccentric, segmented tilting and hoisting device, characterized in that, Includes guide plate, baffle and cover; The guide main board is provided with baffles on both sides, and the baffles are fixedly connected to the guide main board. The baffles are provided with process holes and lifting holes. The cover plate is located on top of the guide main plate and between the two baffles, and the top surface of the cover plate is provided with a lifting eye plate.

2. The irregularly shaped eccentric segmented turning and hoisting device according to claim 1, characterized in that, The guide main board consists of a bending plate and a base plate, which are integrally formed together.

3. The irregularly shaped eccentric segmented turning and hoisting device according to claim 2, characterized in that, The inner side of the bending plate is provided with multiple reinforcing elbows, which are vertically fixed to the base plate and whose edges are in line with the bending plate to support the bending plate.

4. The irregularly shaped eccentric segmented turning and hoisting device according to claim 2, characterized in that, The reinforcing upright is arranged along the center line of the guide main plate and is located between the top plate and the bottom plate. The reinforcing upright is fixedly connected to the top plate and the bottom plate of the guide main plate respectively, and is used to support the top plate.

5. The irregularly shaped eccentric segmented turning and hoisting device according to claim 1, characterized in that, The process hole is located in the middle of the baffle.

6. The irregularly shaped eccentric segmented turning and hoisting device according to claim 1, characterized in that, The front edge of the baffle protrudes from the area of ​​the guide main board and has a hoisting hole for fixing the wire rope for hoisting.

7. The irregularly shaped eccentric segmented turning and hoisting device according to claim 1, characterized in that, The irregularly shaped, eccentric, segmented turning and hoisting device can be reused.

8. A method for lifting and turning irregularly shaped, eccentrically positioned segments, characterized in that: The irregularly shaped eccentric segmented turning and hoisting device as described in any one of claims 1 to 7 is specifically described as follows: Fix the wire rope to the lifting hole on the irregular eccentric segment tilting and lifting device, lift the irregular eccentric segment tilting and lifting device, install the irregular eccentric segment tilting and lifting device on the irregular eccentric segment, use multiple process plates to fix the irregular eccentric segment tilting and lifting device to the irregular eccentric segment, install the irregular eccentric segment tilting and lifting device on the irregular eccentric segment, after the irregular eccentric segment is lifted, fix the wire rope to the lifting eye plate on the cover plate, cut off the process plate, and remove the irregular eccentric segment tilting and lifting device.

9. The irregularly shaped eccentric segmented tilting and hoisting method according to claim 8, characterized in that, The irregularly shaped eccentric segment is the stern shaft segment.

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