Method for modular closure construction of windshield of large container ship

Abstract

The invention provides a modular closure construction method for a windshield of a large container ship, which comprises the following steps: dividing a head mooring deck area and a bulwark, assembling the divided head mooring deck and bulwark into a front section and a rear section, dividing the windshield into a plurality of subsections, and assembling the plurality of subsections of the windshield into a front part and a rear part; the assembly work of the front section of the head mooring deck area, the front section of the bulwark and the front part of the windshield is completed in sequence from bottom to top; the assembly work of the rear section of the head mooring deck area, the rear section of the bulwark and the rear part of the windshield is completed in sequence from bottom to top; designing a hoisting scheme of the head block and the tail block of the windshield; the tail block of the windshield and the head block of the windshield are sequentially folded with the main hull through hoisting, and in the folding stage, the dislocation situation existing between folding seams of the head block of the windshield and the tail block of the windshield needs to be adjusted; according to the method, the general assembling and dock closing efficiency is improved at the same time.

Description

Technical Field

[0001] The present invention relates to the technical field of large container ship assembly, and particularly to a method for modular assembly of the wind deflector of a large container ship. Background Art

[0002] At present, in order to reduce wind resistance, a large container ship usually installs a wind deflector at the bow; the wind deflector of a large container ship belongs to a single-hull super-large opening structure, with large hull lines in both the height and length directions. The structure of the wind deflector is weak, with a special shape and extremely large size, which makes it extremely difficult to construct the wind deflector of a large container ship during the general assembly stage and the closing stage, whether it is for general assembly, closing support or closing hoisting. At the same time, there is a great risk of hoisting deformation.

[0003] In view of these problems, the present application provides a method for modular assembly of the wind deflector of a large container ship. Summary of the Invention

[0004] The purpose of the present invention is to provide a method for modular assembly of the wind deflector of a large container ship. By dividing the wind deflector into segments in combination with the division of the bow mooring deck area and the division of the bulwark segments, the wind deflector is decomposed, and the segments of the wind deflector are dispersed to participate in the general assembly of the bow mooring deck area segments and the bulwark segments respectively, and the relevant general assembly and closing construction are completed.

[0005] The present application proposes a method for modular assembly of the wind deflector of a large container ship, and the method includes the following steps: Division stage: Divide the bow mooring deck area and the bulwark. After division, both the bow mooring deck and the bulwark can be assembled into front and rear sections, and the wind deflector is divided into several segments, and several segments of the wind deflector can be generally assembled into front and rear parts; General assembly stage: Sequentially complete the general assembly of the front section of the bow mooring deck area, the front section of the bulwark, and the front part of the wind deflector from bottom to top to form the front total section of the wind deflector with the overall front position after general assembly; sequentially complete the general assembly of the rear section of the bow mooring deck area, the rear section of the bulwark, and the rear part of the wind deflector from bottom to top to form the rear total section of the wind deflector with the overall rear position after general assembly; Hoisting stage: Design the hoisting plans for the front total section of the wind deflector and the rear total section of the wind deflector respectively to meet the hoisting requirements of the crane; Closing stage: Sequentially hoist the rear total section of the wind deflector and the front total section of the wind deflector for closing with the main hull, and complete the closing installation work; Adjustment stage: During the closing stage, it is necessary to adjust the misalignment between the closing seams of the front total section of the wind deflector and the rear total section of the wind deflector.

[0006] Further, in the division stage, the bow mooring deck area and the bulwark are divided. When both the bow mooring deck and the bulwark after division can be assembled into two sections, the front and the rear: When dividing the bow mooring deck area, ensure that the chain locker is intact after division, and ensure that the chain pipe and the anchor chock are integral as a whole after division; when dividing the bulwark sections, ensure that the general section joint of the bulwark is at the same position as the general section division position of the bow mooring deck area or ensure that the general section joint of the bulwark is closer to the stern direction than the general section joint of the bow mooring deck area. At the same time, the general section joint of the bulwark is ensured to be vertical or inclined towards the stern direction.

[0007] Further, when dividing the windshield sections, the general section joints of the front and rear parts of the windshield are at the same position as the general section joint of the bulwark or the general section joint of the windshield is closer to the stern direction than the general section joint of the bulwark. At the same time, the general section joint of the windshield is ensured to be vertical or inclined towards the stern direction.

[0008] Further, in the general assembly stage, steel struts are arranged on the bow mooring deck. The steel struts act on the hull through the fulcrum members and are used to support the windshield in the general assembly stage.

[0009] Further, in the hoisting stage, for the bow general section of the windshield, a bow hoisting point is set at the tail end of the bow mooring deck, a tail hoisting point is set at the upper end of the windshield, and hoisting and leveling points are set in the middle of the bow mooring deck.

[0010] Further, in the hoisting stage, for the stern general section of the windshield, a port side tail end hoisting point, a port side head end hoisting point, and a starboard side hoisting point are set on the mooring deck.

[0011] Further, in the adjustment stage, when adjusting the misalignment between the closing joints of the bow general section and the stern general section of the windshield, a steel wire rope and a steel wire rope connection device are used to adjust the closing joint.

[0012] The advantages and positive effects of the present invention are: The present invention comprehensively designs and divides the bow mooring deck area sections and the bulwark sections, divides the windshield into two parts, the front and the rear. These two parts are respectively platform-assembled with the bow mooring deck area sections and the bulwark sections, and after the general assembly, they are respectively closed and joined in the dry dock; this method effectively avoids the construction difficulty of the overall windshield being platform-assembled alone, reduces the large amount of strengthening for hoisting the overall windshield section required for the overall windshield hoisting alone, reduces the occupancy time of the gantry crane in the overall hoisting stage, avoids the risk of overall hoisting deformation, and at the same time improves the general assembly and dry dock closing efficiency. Description of the Drawings

[0013] The technical solution of the present invention will be further described in detail below in conjunction with the drawings and embodiments. However, it should be noted that these drawings are only designed for the purpose of explanation and therefore do not limit the scope of the present invention. In addition, unless otherwise specified, these drawings are only intended to conceptually illustrate the structural configuration described herein and are not necessarily drawn to scale.

[0014] Figure 1 Partial side view schematic diagram of the dividing seam of the wind shield for large container ships; Figure 2 Side view schematic diagram of the tail section of the wind shield for large container ships; Figure 3 Side view schematic diagram of the bow section of the wind shield for large container ships; Figure 4 Three-dimensional schematic diagram of the tail section of the wind shield for large container ships; Figure 5 Three-dimensional schematic diagram of the bow section of the wind shield for large container ships; Figure 6 Top view schematic diagram of the hoisting plan for the tail section of the wind shield for large container ships; Figure 7 Top view schematic diagram of the hoisting plan for the bow section of the wind shield for large container ships; Figure 8 Schematic diagram of the support during the general assembly stage of the wind shield sections for large container ships; Figure 9 Schematic diagram of the hull support point components for sectional general assembly; Figure 10 Schematic diagram of the closing process of the tail section and the bow section of the wind shield; Figure 11 Side view schematic diagram of the temporary support after the closing of the tail section and the bow section of the wind shield; Figure 12 Cross-sectional view schematic diagram of the temporary support after the closing of the tail section and the bow section of the wind shield; Figure 13 Schematic diagram of the overall division form of the chain locker, chain pipe and anchor platform in the mooring deck area. Detailed implementation manner

[0015] To make the purpose, technical solutions, and advantages of the implementation of the present invention clearer, the technical solutions in the embodiments of the present invention will be described in more detail below with reference to the accompanying drawings in the embodiments of the present invention. In the drawings, the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions from beginning to end. The described embodiments are some, but not all, of the embodiments of the present invention. The embodiments described below by referring to the drawings are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts belong to the scope of protection of the present invention.

[0016] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0017] This embodiment provides a method for the modular assembly of the windbreak of a large container ship, and the method includes the following steps: S1. Division stage: Divide the bow mooring deck area and the bulwark. After division, both the bow mooring deck and the bulwark can be assembled into front and rear sections, and the windbreak is divided into several segments, and several segments of the windbreak can be grouped into front and rear parts; specifically, when dividing the bow mooring deck area, the bulwark, and the windbreak, each of them can be decomposed into several segments; assembling several segments after dividing the bow mooring deck can obtain the front section 6 of the bow mooring deck and the rear section 3 of the bow mooring deck, where the gap formed when assembling several bow mooring deck segments is called a segment joint; assembling several segments after dividing the bulwark can obtain the front section 5 of the bulwark and the rear section 2 of the bulwark, where the gap formed when assembling several bulwark segments is called a segment joint; assembling several segments after dividing the windbreak can obtain the front part 4 of the windbreak and the rear part 1 of the windbreak, where the gap formed when assembling several windbreak segments is called a segment joint; S2. Grouping stage: Sequentially complete the grouping work of the front section of the bow mooring deck area, the front section of the bulwark, and the front part of the windbreak from bottom to top to form the front windbreak head section 7 of the overall grouping; sequentially complete the grouping work of the rear section of the bow mooring deck area, the rear section of the bulwark, and the rear part of the windbreak from bottom to top to form the rear windbreak tail section 8 of the overall grouping; specifically, as Figure 1 、 2 shown in 3, the gap between the front section of the bow mooring deck area, the front section of the bulwark, and the front part of the windbreak in the front windbreak head section is called a segment joint, and the gap formed between the rear section of the bow mooring deck area, the rear section of the bulwark, and the rear part of the windbreak in the rear windbreak tail section is called a segment joint. For example, a first segment joint 22 is formed between the rear part of the windbreak and the rear section of the bulwark, a second segment joint 23 is formed between the rear section of the bow mooring deck area and the rear section of the bulwark, and the gap formed between the front windbreak head section and the rear windbreak tail section is called a general section joint. For example,Figure 1 The total section seam 15 of the windbreak area formed when the head general section of the windbreak and the tail general section of the windbreak are assembled, the total section seam 16 of the bulwark area, and the total section seam 17 of the mooring deck area; S3. Lifting stage: Design the lifting plans for the head general section of the windbreak and the tail general section of the windbreak respectively to meet the requirements of the crane for lifting. Specifically, when designing the lifting plan for the head general section of the windbreak, it is necessary to arrange the lifting points according to relevant data such as weight and center of gravity. The width of the head general section of the windbreak is small, and the windbreak line shape is large, covering part of the head mooring deck. Therefore, some of the lifting points need to be designed on the windbreak. For the head general section of the windbreak, as Figure 7 shown, a set of tail lifting points 9 is set at the end of the head mooring deck, a set of head lifting points 11 is set at the upper end of the windbreak, and a set of lifting and leveling points 10 is set in the middle of the head mooring deck; when designing the lifting plan for the tail general section of the windbreak, it is necessary to arrange the lifting points according to relevant data such as weight and center of gravity. The length of the tail general section of the windbreak is short and the width is large. All the lifting points can be arranged on the head mooring deck to reduce the difficulty of lifting point design and installation. As Figure 6 shown, a left-end lifting point 12 for the tail general section, a left-end head lifting point 13 for the tail general section, and a right-side lifting point 14 for the tail general section are set on the mooring deck. S4. Closing stage: Through lifting, the tail general section of the windbreak and the head general section of the windbreak are successively closed with the main hull, and the closing installation work is completed; first, complete the lifting and closing of the tail general section of the windbreak. After completing the relevant support and welding work, then carry out the closing of the head general section of the windbreak; specifically, as Figure 10 , 11 shown, successively complete the closing of the tail general section of the windbreak, the head general section of the windbreak and the main hull 24 of the container ship; as Figure 12 shown, Figure 12 is a schematic cross-section of the temporary support after the closing of the tail general section of the windbreak and the head general section of the windbreak. It can be seen from the figure that the bottom of the main hull of the container ship is supported by the general section support tooling 25. S5. Adjustment stage: In the closing stage, it is necessary to adjust the misalignment between the closing seams of the head general section of the windbreak and the tail general section of the windbreak. Specifically, in the division stage, the division of the head mooring deck area and the bulwark is carried out. When both the divided head mooring deck and the bulwark can be assembled into two sections, front and back: As Figure 13As shown in the figure, when dividing the bow mooring deck area, ensure that the chain locker 26 is intact after division, and ensure that the chain pipe and the entire anchor platform 27 are intact after division; when dividing the bulwark section, ensure that the total bulwark joint is at the same position as the total section division position of the bow mooring deck area or ensure that the total bulwark joint is closer to the stern direction than the total section joint of the bow mooring deck area. At the same time, the total bulwark joint is ensured to be vertical or inclined towards the stern direction; when dividing the windshield section, the total section joints of the front and rear parts of the windshield are at the same position as the total bulwark joint or the total windshield joint is closer to the stern direction than the total bulwark joint. At the same time, the total windshield joint is ensured to be vertical or inclined towards the stern direction; through this design method, the stern section of the windshield is closed first and the bow section is closed later, which is more convenient during assembly.

[0018] Specifically, during the pre-assembly stage, as Figure 8 , 9 shown, arrange the first steel strut 18 on the bow mooring deck. The first steel strut acts on the hull through the fulcrum member 20 and is used to support the windshield during the pre-assembly stage. This support structure can be removed before hoisting; arrange the second steel strut 19 and the bottom support box 21 of the section on the ground of the pre-assembly platform. The second steel strut acts on the hull through the fulcrum member 20 and is used to support the bow mooring deck area during the pre-assembly stage. The bottom support box 21 of the section is used to support the mooring deck. The above support structures that play a supporting role can be removed before hoisting; it should be noted that as Figure 9 shown, the fulcrum member 20 can adopt components of other structural forms as long as it realizes the stable contact with the hull.

[0019] Near the closing joint between the bow section and the stern section of the windshield, add windshield lifting lugs to adjust the misalignment between the windshields during the closing stage; the structures on both sides of the windshield closing joint between the bow section and the stern section of the windshield are weak, and the construction height in the dry dock is extremely high. During the closing alignment stage, add the adjusting wire rope 28 and the wire rope connecting device 29, as Figure 4 , 5 shown, among which, the wire rope connecting device can be a marine lifting lug.

[0020] In summary, this embodiment provides a method for the modular assembly of the wind deflector of a large container ship. First, the bow mooring deck area, the bulwark, and the wind deflector are divided. When dividing, the position of the bulwark sectional joint is reasonably matched with that of the bow mooring deck area sectional joint to ensure a reasonable positional relationship between the wind deflector sectional joint and the bulwark sectional joint, preparing for subsequent overall assembly and joining; in the overall assembly stage, in the order from bottom to top, first complete the construction and assembly of the bow mooring deck area sections, then conduct the overall assembly of the bulwark sections, arrange rigid supports on the bow mooring deck, and then connect the wind deflector sections to the assembled parts to complete the overall assembly of the wind deflector sections, and remove the rigid supports before the overall section hoisting; in the hoisting stage, according to the weight and center-of-gravity data of the bow and stern overall sections of the wind deflector, arrange the lifting points respectively; in the joining stage, first hoist and join the stern overall section of the wind deflector, complete the support and welding work, and after ensuring its stability, then conduct the joining of the bow overall section of the wind deflector.

[0021] Finally, it should be pointed out that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. Method for assembling and closing a wind shield of a large container ship in modules, characterized in that, The method includes the following steps: Division stage: Divide the bow mooring deck area and the bulwark. After division, both the bow mooring deck and the bulwark can be assembled into two sections, front and rear. And divide the wind deflector into several segments, and several segments of the wind deflector can be grouped into two parts, front and rear. Grouping stage: Sequentially complete the grouping work of the front section of the bow mooring deck area, the front section of the bulwark, and the front part of the wind deflector from bottom to top to form the bow general section of the wind deflector with the overall front position after grouping; Sequentially complete the grouping work of the rear section of the bow mooring deck area, the rear section of the bulwark, and the rear part of the wind deflector from bottom to top to form the tail general section of the wind deflector with the overall rear position after grouping. Lifting stage: Design the lifting plans for the bow general section of the wind deflector and the tail general section of the wind deflector to meet the requirements of crane lifting respectively. Closing stage: Sequentially conduct the closing of the tail general section of the wind deflector and the bow general section of the wind deflector with the main hull through lifting, and complete the closing installation work. Adjustment stage: During the closing stage, it is necessary to adjust the misalignment between the closing seams of the bow general section of the wind deflector and the tail general section of the wind deflector.

2. The method for the modular assembly construction of the wind shield of a large container ship according to claim 1, characterized in that, In the division stage, when dividing the bow mooring deck area and the bulwark, and both the divided bow mooring deck and the bulwark can be assembled into two sections, front and rear: When dividing the bow mooring deck area, ensure that the chain locker is intact after division, and ensure that the chain pipe and the anchor chock are integrally intact after division; When dividing the bulwark segments, ensure that the general section seam of the bulwark is the same as the general section division position of the bow mooring deck area or ensure that the general section seam of the bulwark is closer to the stern direction compared with the general section seam of the bow mooring deck area. At the same time, the general section seam of the bulwark is ensured to be vertical or inclined towards the stern direction.

3. The method for the modular assembly construction of the wind shield of a large container ship according to claim 2, characterized in that, When dividing the wind deflector segments, the general section seams of the front and rear parts of the wind deflector are the same as the general section seam division position of the bulwark or the general section seam of the wind deflector is closer to the stern direction compared with the general section seam of the bulwark. At the same time, the general section seam of the wind deflector is ensured to be vertical or inclined towards the stern direction.

4. The method for assembling and joining the windshields of a large container ship in sub-modules according to claim 1, characterized in that, In the grouping stage, arrange steel struts on the bow mooring deck. The steel struts act on the hull through the fulcrum members and are used to support the wind deflector during the grouping stage.

5. The method for assembling the wind shield of a large container ship in modules as claimed in claim 1, characterized in that, In the lifting stage, for the bow general section of the wind deflector, set a bow lifting point at the tail end of the bow mooring deck, set a tail lifting point at the upper end of the wind deflector, and set a lifting and leveling point in the middle of the bow mooring deck.

6. The method for modular assembly construction of the wind deflector of a large container ship according to claim 1, characterized in that, In the lifting stage, for the tail general section of the wind deflector, set a starboard aft end lifting point, a starboard forward end lifting point, and a port side lifting point on the mooring deck.

7. The method for modular assembly construction of the wind shield of a large container ship according to claim 1, characterized in that, In the adjustment stage, when adjusting the misalignment between the closing seams of the bow general section of the wind deflector and the tail general section of the wind deflector, use steel wire ropes and steel wire rope connection devices to adjust the closing seams.

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