Floating-state carrying method for ship block

Abstract

The invention provides a ship block floating carrying method, which comprises the following steps of: launching a main ship body to berth at a wharf of a still water harbor basin, carrying out stowage leveling on a launching area, lightering a block needing to be carried to a specified position, and selecting corresponding floating crane equipment according to the weight of the block to carry out floating carrying on the block. The invention provides a brand-new feasibility scheme for whole ship building, the whole ship is built by combining equipment and facility conditions of each site and fully utilizing existing resources, the requirement of a traditional mode for site conditions is broken through, site limitation is broken through, the slipway or dock period is shortened, other site resources are not occupied, and the construction cost is reduced. And the production rhythm of other types of ships is ensured.

Description

Technical Field

[0001] The invention belongs to the technical field of shipbuilding, and specifically relates to a method for floating mounting of a ship section. Background Art

[0002] Ship loading is a necessary way to form a conventional ship under the current shipbuilding model, and it is also an important node in the current shipbuilding process. Usually, it is loaded by hoisting or shifting docking on the slipway or dock. This conventional loading method needs to be planned in advance according to the capacity of the site and equipment facilities, and the ship type and site information. In order to make full use of the existing site and shorten the slipway or dock cycle, some ships will plan the method of loading the entire ship in a floating state on the water according to the construction plan to complete the loading and forming of the entire ship.

[0003] As the core resource site for the whole ship construction in a shipyard, the slipway or dock has a high site cost. Usually, when planning the overall construction plan, the main consideration is to improve the construction efficiency of the slipway or dock and shorten the construction period of the slipway or dock. However, in the actual process, due to the different sizes and production rhythms of various types of ships, when arranging the ship position according to the actual production needs and production plan, the overall construction period of some types of ships may be relatively short, or the site capacity may not meet the requirements of the whole ship construction, and it will be moved to other sites for the second time, resulting in insufficient construction period, additional costs, and even disrupting the production rhythm of other types of ships. Summary of the invention

[0004] In view of the shortcomings of the prior art described above, the present invention provides a method for floating loading of ship sections. The main hull is launched and moored at a dock in a still water harbor. The launching area is loaded and leveled. At the same time, the sections to be loaded are barged to a designated location. The corresponding floating crane equipment is selected according to the weight of the sections to carry out floating loading of the sections. The present invention provides a new feasible plan for whole-ship construction. It combines the conditions of various site equipment and facilities, makes full use of existing resources for whole-ship construction, breaks the requirements of the traditional model for site conditions, breaks through site restrictions, shortens the slipway or dock cycle, does not occupy other site resources, and ensures the production rhythm of other types of ships.

[0005] To achieve the above-mentioned and other related purposes, the present invention provides a method for floating a ship section, comprising the following steps:

[0006] According to the ship's position arrangement, the ship is divided into a main hull and several sections;

[0007] The main hull is launched into water, and the horizontal data of the main deck is measured, so as to simulate the loading of the total section, and to perform margin cutting and interference correction on the total section;

[0008] Providing upper hoisting rigging and lower hoisting rigging, connecting the upper hoisting rigging with the floating crane, and connecting the lower hoisting rigging with the overall section;

[0009] The upper lifting rigging and the lower lifting rigging are connected, and the floating crane lifts the entire section above the main hull for positioning and installation.

[0010] Optionally, after dividing the total sections, the method further includes: arranging hoists on the total sections according to the structural form of the total sections, and performing finite element calculation and analysis to ensure that stress and deformation during the hoisting process meet the requirements.

[0011] Optionally, the overall section has a symmetry axis along its length direction, and thirty-two hanging horses are arranged on the overall section, and the thirty-two hanging horses are symmetrically arranged on both sides of the symmetry axis.

[0012] Optionally, according to the arrangement of the hoisting horses, a plan for lengthening the hoisting rigging is designed, and an interference analysis is performed.

[0013] Optionally, the upper lifting rigging includes two first steel wire ropes and four second steel wire ropes, each of the first steel wire ropes is folded in half to form two first lifting points, and the first lifting points are connected to the second steel wire ropes.

[0014] Optionally, the lower lifting rigging includes four third steel ropes and eight fourth steel ropes, each of the third steel ropes is folded in half to form two second lifting points, and the second lifting points are connected to the midpoints of the fourth steel ropes.

[0015] Optionally, the second steel wire rope is connected to the midpoint of the third steel wire rope to connect the upper lifting rigging and the lower lifting rigging.

[0016] Optionally, after the main hull is launched, the method further includes: loading and buoyancy adjustment of the main hull so that the deck level in the lifting section area is less than 1‰.

[0017] Optionally, during positioning installation, a pull scale is used to assist in fitting.

[0018] The method for floating loading of a ship section provided by the present invention has at least the following beneficial effects:

[0019] The present invention provides a new feasible plan for whole-ship construction, which combines the conditions of various site equipment and facilities and makes full use of existing resources to build the whole ship, breaking the requirements of traditional models on site conditions, breaking through site limitations, shortening the slipway or dock cycle, and does not occupy other site resources, thus ensuring the production rhythm of other types of ships. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1Shown is a flow chart of the method for floating loading of a ship section provided in an embodiment.

[0021] Figure 2 Shown is a schematic diagram of the overall division of a ship provided in an embodiment.

[0022] Figure 3 Shown is a hanging horse arrangement diagram provided for an embodiment.

[0023] Figure 4a to Figure 4b Shown is a schematic diagram of extending the lifting rigging provided in an embodiment.

[0024] Figure 5 Shown is a diagram showing the arrangement of horizontal data measurement points on the main deck provided for an embodiment.

[0025] Figure 6 Shown is a schematic diagram of the overall section lifting provided in an embodiment.

[0026] Component number description

[0027] 1. Total

[0028] 2 main hull

[0029] 3 Hanging Horse

[0030] 41 First Wire Rope

[0031] 42 Second Wire Rope

[0032] 43 Third Wire Rope

[0033] 44 Fourth Wire Rope

[0034] 100 First Lifting Point

[0035] 200 Second lifting point

[0036] 300 horizontal data measurement points DETAILED DESCRIPTION

[0037] The following describes the embodiments of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention.

[0038] It should be noted that the illustrations provided in this embodiment only illustrate the basic concept of the present invention in a schematic manner. Although the illustrations only show components related to the present invention rather than being drawn according to the number, shape and size of components in actual implementation, the form, quantity, positional relationship and proportion of each component in actual implementation can be changed at will under the premise of realizing the technical solution of this party, and the component layout form may also be more complicated.

[0039] Example

[0040] This embodiment provides a method for floating a ship section. Figure 1 As shown, the following steps are included:

[0041] Step S1: Divide the ship into a main hull and several sections according to the ship position arrangement;

[0042] First, according to the ship layout, combined with the launching method and equipment and facility conditions, the ship is divided into a main hull and several sections, and the implementation objects of the floating loading plan are clarified. Figure 2 As shown, the main deck is generally used as the boundary, the area above the main deck is the upper construction area, and the area below the main deck is the main hull area. The object of floating loading is the total section 1 in the upper construction area. Usually, after the main hull 2 ​​is loaded, the upper construction total section 1 is hoisted. As an example, the upper construction total section 1 is divided into total sections according to its site equipment and facility information. The number of total sections 1 built on each type of ship is different, but the weight of the total section 1 is generally controlled within 1,600 tons. In this embodiment, the objects of subsequent floating loading are two total sections 1.

[0043] Next, according to the structural form of the whole section 1, the lifting horse is arranged on the whole section 1. As an example, according to the structural form, weight and center of gravity position of the whole section 1, the lifting horse is arranged, the form and arrangement position of the lifting horse, and the setting of the lifting horse reinforcement are determined. Figure 3 As shown, the total section 1 needs to use thirty-two A-50 standard lifting horses. The total section 1 has a symmetry axis along its length direction. The thirty-two lifting horses 3 are symmetrically arranged on both sides of the above-mentioned symmetry axis, and the lifting horses 3 on one side are arranged on the front and rear sides of the floating hook, with eight lifting horses on the front and rear sides; the two lifting horses 3 at the stern and the two lifting horses 3 at the bow are arranged along the direction of the wire rope, and the back is reinforced with flat steel. According to the structural form of the total section 1, the free edge of the total section 1 is reinforced.

[0044] Next, according to the weight, center of gravity and arrangement of hoisting horse 3 of the total section 1, finite element calculation is performed on the hoisting of the total section to analyze the stress and deformation during the hoisting process to ensure that the stress and deformation meet the hoisting requirements.

[0045] Next, according to the arrangement of the hoisting horse 3, the lengthening scheme of the hoisting rigging is designed, and interference analysis is performed. Specifically, according to the arrangement of the hoisting horse 3 and the position of the hoisting point, the wire rope is extended to meet the hoisting requirements. Figure 4a-4b As shown, the lifting rigging includes an upper lifting rigging and a lower lifting rigging, the upper lifting rigging includes two first steel wire ropes 41 and four second steel wire ropes 42, the two first steel wire ropes 41 are folded in half to form four first lifting points 100, and the four first lifting points 100 are respectively connected to the four second steel wire ropes 42; the lower lifting rigging includes four third steel wire ropes 43 and eight fourth steel wire ropes 44, each third steel wire rope 43 is folded in half to form two second lifting points 200, the second lifting points 200 are connected to the midpoints of the fourth steel wire ropes 44, and the fourth steel wire ropes 44 generate sixteen lifting points for connecting the lifting horse 3; the second steel wire ropes 42 are connected to the midpoints of the third steel wire ropes 43 to connect the upper lifting rigging and the lower lifting rigging.

[0046] In this embodiment, the length of the first steel wire rope 41 is 16m, the diameter is 150mm, and the horizontal spacing between the two first steel wire ropes 41 is 5m; the length of the second steel wire rope 42 is 25m, the diameter is 148mm; the length of the third steel wire rope is 12m, the diameter is 100mm; the length of the fourth steel wire rope 44 is 15m, the diameter is 83mm; at this time, the height of the hook from the hoisting horse 3 is about 46.5m. Under this working condition, the interference of the steel wire rope is analyzed. Specifically, according to the position of the steel wire rope and the structure on the total section, by comparing the three views around the steel wire rope structure, the safe distance between the steel wire rope and the structure can be seen, and it can be judged whether there is interference between the steel wire rope and the structure.

[0047] Step S2: The main hull is launched into water, and the horizontal data of the main deck is measured, so as to simulate the loading of the total section, and perform margin cutting and interference correction on the total section;

[0048] First, the main hull 2 ​​is launched and moored at a designated wharf for cable laying. As an example, there needs to be an assembly site around the wharf for placing the upper construction section 1, and the upper construction section is barged to the assembly site beside the wharf. In another optional embodiment, assembly can also be carried out directly at the assembly site.

[0049] Next, after the main hull 2 ​​is launched, the buoyancy is adjusted, the draft data is adjusted according to the required ballast, and then the ballast is adjusted according to the horizontal data of the main deck so that the deck level of the hoisting section area is less than 1‰. In this embodiment, the horizontal data measurement point 300 on the main deck refers to Figure 5 shown.

[0050] Then, based on the measured horizontal measurement data of the main deck, the One Time Setting (OTS) technology is used to simulate the loading of the total section 3, cut the margin in advance, and correct the interference in advance, so that it can be directly positioned and installed during floating loading. As an example, when performing simulated loading, data is collected from the on-site benchmark segment and positioning segment, and the best loading and positioning plan is formulated using simulation analysis software. The margin value that needs to be trimmed and cut after the segment docking and the misalignment of the components are obtained. The margin trimming and component misalignment are corrected before positioning, so as to achieve a successful one-time loading and positioning, improve the utilization rate of the crane, and improve the on-site construction environment.

[0051] Step S3: providing an upper lifting rigging and a lower lifting rigging, connecting the upper lifting rigging to the floating crane, and connecting the lower lifting rigging to the overall section;

[0052] First, the lower lifting rigging and the lifting horse 3 are installed in advance through the shackle, and the upper lifting rigging and the floating crane are also connected in advance. In the subsequent lifting process, it is only necessary to connect the upper lifting rigging and the lower lifting rigging, which can save the time of hanging the lifting horse with the wire rope on site and reduce the difficulty of hanging the lifting horse with the wire rope.

[0053] Then, the floating crane came in to drop anchor and tie the cable at the harbor dock.

[0054] Next, connect the upper lifting rigging and the lower lifting rigging through the shackle.

[0055] Step S4: connecting the upper lifting rigging and the lower lifting rigging, and the floating crane lifts the entire section above the main hull for positioning and installation.

[0056] First, adjust the position of the floating crane center and the center of section 1, and make hook adjustments.

[0057] Next, the floating crane is moved to lift the section 1 onto the main hull 2, and the position of the floating crane is adjusted to carry out cable laying.

[0058] Then, if Figure 6 As shown, the floating crane is adjusted to position and install the main section 1 and the main hull 2. After the floating crane is displaced, since it cannot turn, it is necessary to adjust the positioning cable according to the position of the main section 1 on the main hull 2, so that the center of the floating crane hook corresponds to the center position of the main section 1 on the ship, and then the main section 1 is hoisted to the designated position on the ship for positioning and installation. During the positioning and installation, there will be a situation where the midship fits and there is a gap between the bow and stern, and a pull scale can be used for auxiliary fitting.

[0059] Finally, the positioning and installation of section 1 was completed, the floating rigging was dismantled, and the floating loading was completed.

[0060] This embodiment provides a new feasible solution for the whole ship construction. The main hull is launched and moored at the dock of the still water harbor. The launching area is loaded and leveled. At the same time, the main section to be loaded is barged to the designated location. The corresponding floating crane equipment is selected according to the weight of the main section to carry out the floating loading of the main section. This embodiment combines the equipment and facilities conditions of each site and makes full use of existing resources for the whole ship construction, breaking the requirements of the traditional model for site conditions, breaking through the site restrictions, shortening the slipway or dock cycle, and not occupying other site resources, ensuring the production rhythm of other types of ships.

[0061] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed by the present invention shall still be covered by the claims of the present invention.

Claims

1. A method for floating ship sections, characterized in that: The steps include: According to the ship layout, the ship is divided into a main hull and several sections; The main hull is launched into water, and the horizontal data of the main deck is measured, so as to simulate the loading of the total section, and perform margin cutting and interference correction on the total section; Providing upper hoisting rigging and lower hoisting rigging, connecting the upper hoisting rigging with the floating crane, and connecting the lower hoisting rigging with the overall section; The upper lifting rigging and the lower lifting rigging are connected, and the floating crane lifts the entire section above the main hull for positioning and installation.

2. The method for floating ship sections according to claim 1, characterized in that: After dividing the plurality of total sections, the method further includes: arranging hoisting horses on the total sections according to the structural form of the total sections, and performing finite element calculation and analysis to ensure that the stress and deformation during the hoisting process meet the requirements.

3. The method for floating ship sections according to claim 2, characterized in that: The total section has a symmetry axis along its length direction, and thirty-two hanging horses are arranged on the total section, and the thirty-two hanging horses are symmetrically arranged on both sides of the symmetry axis.

4. The method for floating ship sections according to claim 3, characterized in that: According to the arrangement of the hoisting horses, a plan for lengthening the hoisting rigging is designed, and an interference analysis is performed.

5. The method for floating ship sections according to claim 4, characterized in that: The upper lifting rigging includes two first steel wire ropes and four second steel wire ropes. Each of the first steel wire ropes is folded in half to form two first lifting points. The first lifting points are connected to the second steel wire ropes.

6. The method for floating ship sections according to claim 5, characterized in that: The lower lifting rigging includes four third steel ropes and eight fourth steel ropes, each of the third steel ropes is folded in half to form two second lifting points, and the second lifting points are connected to the midpoints of the fourth steel ropes.

7. The method for floating ship sections according to claim 6, characterized in that: The second steel wire rope is connected to the midpoint of the third steel wire rope to connect the upper hoisting rigging and the lower hoisting rigging.

8. The method for floating ship sections according to claim 1, characterized in that: After the main hull is launched, the following steps are also included: The main hull is loaded and adjusted for buoyancy so that the deck level in the area of ​​the hoisting section is less than 1‰.

9. The method for floating ship sections according to claim 1, characterized in that: During positioning installation, a pull scale is used to assist in fitting.

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