Large ship bow door area segmentation construction method

Abstract

The invention discloses a sectional construction method for a bow door area of a large ship, belongs to the technical field of large ship construction, and solves the technical problem that large-area construction is not facilitated due to the fact that a bow door and a bow are sectionally combined and integrally constructed at present. The method comprises the following steps of: dividing a bow block into an upper part, a middle part and a lower part by taking the principle that high-altitude operation is converted into flat ground operation and conditions are created by adopting automatic welding instead of reducing overhead welding as follows: the upper part is a forecastle deck semi-three-dimensional section, the middle part is a main deck semi-three-dimensional section and a bow door section, and the lower part is a bottom tongue sheet body section; the forecastle deck semi-three-dimensional section, the main deck semi-three-dimensional section, the bow door section and the bottom tongue sheet body section can be synchronously constructed and manufactured, and finally the bow block is formed through folding. In this way, the workshop plane and sheet body production line capacity can be fully utilized, space division and time orderliness can be achieved, synchronous construction of the bow section and the bow door can be facilitated, the construction operation condition is relatively good, welding in a narrow space is reduced, and the overall construction efficiency of the sections is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of large ship construction, and more particularly to a method for constructing a large ship bow door region in sections. Background Art

[0002] The large bow door and bow section are a key point in the entire construction cycle of this type of ship and are also the key to reducing the overall construction cost. Figure 1 As shown, the current construction method is to combine the bow gate 2 and bow 3 in sections to form the bow section 1. This is not conducive to large-scale construction and increases the risk of long-term high-altitude work. Furthermore, its economic performance is generally poor, which is not conducive to shortening the overall construction period and controlling costs. Therefore, it is necessary to design a suitable construction process to reduce the construction difficulty and improve the overall construction efficiency of the section. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to address the above-mentioned deficiencies in the prior art, and an object of the present invention is to provide a segmented construction method for a large ship bow door area that can improve construction efficiency.

[0004] The technical solution of the present invention is: a method for constructing the bow door area of ​​a large ship in sections, based on the principle of converting high-altitude operations into ground operations and reducing overhead welding to create conditions for automatic welding. The bow section is divided into three parts: upper, middle and lower. The upper part is a semi-three-dimensional section of the forecastle deck, the middle part is a semi-three-dimensional section of the main deck and the bow door section, and the lower part is a bottom tongue section.

[0005] The forecastle deck semi-three-dimensional segmentation is constructed in lanes using the forecastle deck as the base surface and using the inclined plane position + plane assembly method;

[0006] The main deck semi-three-dimensional segment is constructed in lanes using the main deck as the base surface and the inclined plane position + plane assembly method;

[0007] The bow gate is divided into sections and built into an outer plate curved frame in the form of curved surface assembly, and is constructed in lanes using a curved surface position + flat surface assembly method;

[0008] The bottom tongue sheet segments are constructed in lanes using the tongue end plate plane as a base plane and an inclined plane position + plane assembly method.

[0009] As a further improvement, temporary bonding materials are added during the segmented construction process of the bow door to reduce welding deformation.

[0010] Furthermore, during the construction process of the bottom tongue sheet segment, the tongue end platform plate, T-shaped assembly, frame and wall plate of the bottom tongue sheet segment can be assembled in a plane and then assembled on the tire.

[0011] Furthermore, during the construction process of the main deck semi-three-dimensional segment, the longitudinal and transverse wall panels, bow sealing plates, T-shaped assemblies and frames of the main deck semi-three-dimensional segment can be assembled in a plane and then assembled on the tire, and the middle channel is strengthened during the assembly process.

[0012] Furthermore, during the construction process of the forecastle deck semi-three-dimensional segment, the longitudinal and transverse wall panels, bow sealing plates, T-shaped assemblies and frames of the forecastle deck semi-three-dimensional segment can be assembled in a plane and then assembled on a tire.

[0013] Furthermore, it is characterized in that independent cradles are respectively established for the forecastle deck semi-three-dimensional segment, the main deck semi-three-dimensional segment, the bow gate segment, and the bottom tongue sheet segment, and the forecastle deck semi-three-dimensional segment, the main deck semi-three-dimensional segment, the bow gate segment, and the bottom tongue sheet segment can be constructed and manufactured simultaneously.

[0014] Furthermore, after the forecastle deck semi-three-dimensional segment, the main deck semi-three-dimensional segment, the bow gate segment, and the bottom tongue sheet segment are completed, the bow gate segment is first hoisted onto the main deck semi-three-dimensional segment and closed on the tire segment, and then the bottom tongue sheet segment is hoisted over and closed, and then the entire closed body is untied and hoisted onto the forecastle deck semi-three-dimensional segment and closed on the tire segment to form a bow total section.

[0015] Beneficial effects

[0016] Compared with the prior art, the present invention has the following advantages:

[0017] The present invention divides the bow section into forecastle deck semi-stereoscopic sections, main deck semi-stereoscopic sections, bow gate sections, and bottom tongue sections, all of which are constructed and fabricated simultaneously before being assembled into the bow section. This fully utilizes the workshop's floor plan and the sheet production line's capacity, achieving spatial separation and time management. This facilitates the simultaneous construction of the bow sections and bow gate, improves working conditions, reduces welding in confined spaces, and improves overall section construction efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the division of the bow section in the traditional construction method;

[0019] Figure 2 This is a schematic diagram of the division of the bow section of the present invention.

[0020] Among them: 1-bow section, 2-bow gate, 3-bow, 4-forecastle deck semi-three-dimensional section, 5-main deck semi-three-dimensional section, 6-bow gate section, 7-bottom tongue section. DETAILED DESCRIPTION

[0021] The present invention will be further described below with reference to the specific embodiments in the accompanying drawings.

[0022] See Figure 2 A method for constructing the bow gate area of ​​a large ship in sections is specifically as follows: based on the principle of converting high-altitude operations into ground operations and reducing overhead welding to create conditions for adopting automatic welding, the bow section 1 is divided into three parts: upper, middle and lower. The upper part is the forecastle deck semi-three-dimensional section 4, the middle part is the main deck semi-three-dimensional section 5 and the bow gate section 6, and the lower part is the bottom tongue sheet section 7.

[0023] That is, the present invention designs a suitable segmented assembly process technology, reasonably decomposes the segmented construction workload, realizes the separate and orderly production of segmented parts, converts high-altitude operations into ground operations as much as possible, reduces overhead welding, and adopts automatic welding as much as possible, thereby improving the overall construction efficiency of the segments.

[0024] Specifically, the forecastle deck semi-stereoscopic segment 4 uses the forecastle deck as the base surface and is constructed in lanes using the inclined plane position + plane assembly method. The main deck semi-stereoscopic segment 5 uses the main deck as the base surface and is constructed in lanes using the inclined plane position + plane assembly method. The bow gate segment 6 uses the outer plate curved frame in the form of curved surface assembly and is constructed in lanes using the curved plane position + plane assembly method. The bottom tongue sheet segment 7 uses the tongue end plate plane as the base surface and is constructed in lanes using the inclined plane position + plane assembly method. In this way, the workshop plane and sheet production line capacity can be fully utilized to achieve spatial lanes, orderly time, and convenient simultaneous construction of the bow segment and bow gate. The construction working conditions are relatively good and welding in a small space is reduced.

[0025] For example, the original F000 bow section weighs 70 tons. The original bow section is divided into the forecastle deck semi-three-dimensional section of about 27.5 tons, the bottom tongue section of about 7.6 tons, the main deck semi-three-dimensional section of about 20 tons, and the bow gate section of about 15 tons.

[0026] For bow gate section 6, during construction, a curved outer plate cradle was constructed using a curved surface assembly method, followed by a curved surface cradle and flat surface assembly method for construction in separate lanes. The bow gate lacks the hull structure as a support constraint, making the connection between the bow gate and hull structures unclear during construction. This can easily lead to longitudinal, transverse, and torsional deformation, necessitating the addition of temporary support materials to minimize welding deformation.

[0027] During the construction process, the bottom tongue segment 7 is constructed using the main deck as the base surface, using a ramp-on-flat assembly method. The tongue end platform, T-shaped assembly, frame, and wall panels of the bottom tongue segment 7 can all be assembled flatly before being mounted on the platform.

[0028] During the construction process, the main deck semi-rigid section 5 was constructed using the main deck as the base surface, using an inclined planar layout and flat assembly method. The longitudinal and transverse panels, bow seal, T-shaped components, and frames of the main deck semi-rigid section 5 were all assembled flat, then mounted on the planar layout. The central aisle was reinforced during the assembly process.

[0029] During the construction process, the forecastle deck semi-stereoscopic section 4 is constructed using the forecastle deck as the base surface, with construction carried out in separate lanes using an inclined planar layout and flat assembly method. The longitudinal and transverse wall panels, bow closure, T-shaped components, and frames of the forecastle deck semi-stereoscopic section 4 can all be assembled flatly before being mounted on the planar layout.

[0030] Independent cradles are built for the forecastle deck semi-stereoscopic section 4, the main deck semi-stereoscopic section 5, the bow gate section 6, and the bottom tongue section 7 respectively. The forecastle deck semi-stereoscopic section 4, the main deck semi-stereoscopic section 5, the bow gate section 6, and the bottom tongue section 7 can be constructed and manufactured simultaneously, and the construction working conditions are relatively good.

[0031] After the forecastle deck semi-stereoscopic section 4, main deck semi-stereoscopic section 5, bow gate section 6, and bottom tongue section 7 are completed, bow gate section 6 is first hoisted onto the main deck semi-stereoscopic section 5 and assembled on the tire section. Next, bottom tongue section 7 is hoisted over and assembled together. The entire assembled section is then unloaded and hoisted onto the forecastle deck semi-stereoscopic section 4 and assembled on the tire section to form the bow section 1. This ensures effective control of the outer plating alignment during assembly of the bow gate curved surface, the positioning accuracy of the eye plates at both ends of the L-shaped hinge arm, the pre-installation accuracy of the sealing groove and the anchor hole in the outer plating, the accuracy of the roll-on / roll-off accessories (such as the hook lock, stop block, and locking pin), the pre-tightening force test of the L-shaped hinge arm, and the marking and cutting accuracy of the bow gate slit.

[0032] The solution of the present invention reduces the difficulty of project construction, alleviates the labor intensity of workers, saves labor costs, and improves overall construction efficiency.

[0033] The above is only a preferred embodiment of the present invention. It should be pointed out that for those skilled in the art, several modifications and improvements can be made without departing from the structure of the present invention. These will not affect the effect of the implementation of the present invention and the practicality of the patent.

Claims

1. A method for constructing a large ship bow door area in sections, characterized in that: Based on the principle of converting high-altitude work into ground work and reducing overhead welding to create conditions for automatic welding, the bow section (1) is divided into three parts: upper, middle and lower. The upper part is a forecastle deck semi-stereoscopic section (4), the middle part is a main deck semi-stereoscopic section (5) and a bow door section (6), and the lower part is a bottom tongue sheet section (7). The forecastle deck semi-stereoscopic segment (4) is constructed in lanes by using the forecastle deck as a base surface and an inclined plane + plane assembly method; The main deck semi-stereoscopic segment (5) is constructed in lanes using the main deck as a base surface and an inclined plane + plane assembly method; The bow gate segment (6) is constructed by using a curved surface assembly to form an outer plate curved surface frame, and is constructed in lanes using a curved surface frame position + flat surface assembly method; The bottom tongue sheet segment (7) uses the tongue end plate plane as the base surface and is constructed in lanes using an inclined plane position + plane assembly method.

2. A method for constructing a large ship bow door area in sections according to claim 1, characterized in that: During the construction process of the bow door segment (6), temporary auxiliary materials are added to reduce welding deformation.

3. A method for constructing a large ship bow door area in sections according to claim 1, characterized in that: During the construction process of the bottom tongue sheet segment (7), the tongue end platform plate, T-shaped assembly, frame and wall plate of the bottom tongue sheet segment (7) can be assembled in a plane and then assembled on the tire.

4. A method for constructing a large ship bow door area in sections according to claim 1, characterized in that: During the construction of the main deck semi-stereoscopic segment (5), the longitudinal and transverse wall panels, bow seal panels, T-shaped assemblies and frames of the main deck semi-stereoscopic segment (5) can be assembled in a plane and then assembled on a tire. During the assembly process, the middle channel is strengthened.

5. The method for constructing a large ship bow door area in sections according to claim 1, characterized in that: During the construction process of the forecastle deck semi-stereoscopic segment (4), the longitudinal and transverse wall panels, bow sealing plates, T-shaped assemblies and frames of the forecastle deck semi-stereoscopic segment (4) can be assembled in a plane and then assembled on a tire.

6. A method for constructing a large ship bow door area in sections according to any one of claims 1 to 5, characterized in that: Independent cradles are respectively built for the forecastle deck semi-stereoscopic segment (4), the main deck semi-stereoscopic segment (5), the bow door segment (6), and the bottom tongue sheet segment (7), and the forecastle deck semi-stereoscopic segment (4), the main deck semi-stereoscopic segment (5), the bow door segment (6), and the bottom tongue sheet segment (7) can be constructed and manufactured simultaneously.

7. A method for constructing a large ship bow door area in sections according to claim 6, characterized in that: After the forecastle deck semi-stereoscopic segment (4), the main deck semi-stereoscopic segment (5), the bow door segment (6), and the bottom tongue sheet segment (7) are manufactured, the bow door segment (6) is firstly hoisted onto the main deck semi-stereoscopic segment (5) and closed on the tire segment, and then the bottom tongue sheet segment (7) is hoisted over and closed, and then the entire closed body is removed from the tire and hoisted onto the forecastle deck semi-stereoscopic segment (4) and closed on the tire segment to form the bow total segment (1).

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