Method for assembling wide cabin block in different places

Abstract

The invention relates to the technical field of ship production, and discloses a method for remotely assembling a full-width engine room block, and a remote assembling mechanism comprises a large door frame and an engine room block; the cabin block comprises a second subsection which is hoisted and placed on a large door frame and a first subsection which is combined with the second subsection into a whole in a subsection carrying manner; a support is arranged on the large door frame and located at the suspended position of the cabin block, buttresses are arranged at the positions where ribs of the cabin block and the large door frame are placed, and first I-shaped steel and second I-shaped steel are installed at the two ends of the large door frame respectively. The method for remotely assembling the full-width cabin block solves the problems that the cabin block belongs to the most complex part in a hull structure and belongs to extra-large piece remote transportation, the shape of the full-width cabin block is irregular, large deformation risks exist in the assembling precision and the transportation process, and the cabin block cannot be used as an object for remotely assembling usually; and the difficulty of ship construction is improved.

Description

Technical Field

[0001] The invention relates to the technical field of ship production, and in particular to a method for off-site assembly of full-width engine room sections. Background Art

[0002] Under the current shipbuilding model, whether it is the renovation of an old plant or the planning of a new plant, emphasis is placed on expanding the assembly site around the dock (or slipway), using large-scale lifting equipment to weld several sections into a main section, and lifting and assembling them at one time. The number and degree of completeness of a ship's main assembly hoisted reflects the shipyard's technological level and production capacity.

[0003] However, the assembly site is limited. With the diversification of ship types and the acceleration of production pace, the shortage of assembly site has restricted the improvement of dock turnover rate. In order to shorten the dock cycle, the assembly of sections is carried out off-site in the area covered by other medium-sized lifting equipment, and then transported as a whole to the assembly site for lifting to the dock. This method can effectively solve the problem of insufficient assembly site, thereby achieving the purpose of fully utilizing the dock assembly capacity.

[0004] However, the engine room section is the most complex part of the hull structure. Taking the three-deck full-width section of a 180,000-ton dual-fuel bulk carrier as an example, its main dimensions (length × width × height) are: 28.9 × 40.3 × 4.6 (m), and its weight is 622 tons. It is an oversized piece for off-site transportation. The full-width engine room section has an irregular shape, and there is a great risk of deformation during the assembly accuracy and transportation process. It is usually not suitable for off-site assembly, which increases the difficulty of ship construction. Summary of the invention

[0005] In view of the deficiencies in the prior art, the invention provides a method for remote assembly of full-width nacelle sections, which solves the problems mentioned in the above background.

[0006] The invention provides the following technical solutions: a method for remote assembly of full-width nacelle sections, wherein the remote assembly mechanism comprises: a large mast and a nacelle section;

[0007] The nacelle section comprises a second section hoisted and placed on a large mast, and a first section integrated with the second section;

[0008] The large door frame is provided with a support, the support is located at the suspended part of the cabin section, the cabin section rib position and the large door frame are provided with a buttress, the first I-beam and the second I-beam are respectively installed at both ends of the large door frame, a flatbed car travels at the bottom of the large door frame, and a channel steel is welded at the bottom of the cabin section;

[0009] The steps of off-site grouping include:

[0010] S1, steel is welded in a remote site to form a large door frame as the general assembly tooling structure;

[0011] S2: Arrange the gate frame in the off-site site according to the size of the cabin segments, and install piers on the gate frame according to the position of the cabin segment hoisting to place the lower end surface of the segment, and complete the segment hoisting;

[0012] S3, weld the lower end surface of the cabin section to the gate frame by setting channel steel, and set support at the bottom of the suspended part of the cabin section deck;

[0013] S4, using a flatbed truck to carry and assemble the first section and the second section fixed on the large door frame into a cabin section, and then install the first I-beam and the second I-beam on the large door frame, so that the large door frame is fixed after arrangement;

[0014] S5, use a flatbed truck to lift the assembled cabin section and transport it from the off-site site to the assembly site for assembly.

[0015] Preferably, eight large portal frames are arranged in the assembly site, and the eight large portal frames are divided into four groups symmetrically arranged with the center line of the cabin assembly deck as the axis and are respectively placed at the bottom of the first section and the second section.

[0016] Preferably, the first I-beams installed on the two large gate frames with symmetrical ends fitted together are connected as a whole, and the first I-beam and the second I-beam are rigidly fixedly connected to the large gate frames that are in contact along the longitudinal path.

[0017] Preferably, the gate frame includes a frame body and supporting legs, the frame body is a frame-like tabletop structure welded from steel materials, and the supporting legs are integrally arranged at both ends of the frame body.

[0018] Preferably, the channel steel is connected to the cabin section and the gate frame by a sealing welding process.

[0019] Preferably, in S3, the segment positioning is strictly based on the rib position reference line in the segment to determine the margin value, and for each large joint in the segment, the rib spacing is increased by 5 to 8 m for welding compensation, and the rib spacing of the large joint is controlled between ±15 m.

[0020] Preferably, in S3, the joint position between the first segment and the second segment is located at a straight portion of the cabin segment with a smaller curvature, and the joint between the first segment and the second segment is arranged within the same rib spacing.

[0021] Preferably, in said S4, the engine room block division is based on the hull, the number of blocks is expanded, and the main deck, anchor hole and bulwark are all completed in the block stage.

[0022] Preferably, in said S4, the butt joint between the outer plates of the first section and the second section of the cabin should first be welded with a transverse weld along the width of the cabin, and then with a longitudinal weld.

[0023] Preferably, in S5, the large portal frame is welded to a frame formed by a combination of supports, piers and channel steels and supported on the bottom of the cabin section, and then lifted and supported by a flatbed truck through the bottom of the large portal frame for land transportation.

[0024] Compared with the prior art, the invention has the following beneficial effects:

[0025] 1. The method for off-site assembly of the full-width engine room section is as follows: according to the situation of the engine room section, a support, a pier and a large door frame are used to form a tire frame, and the large door frame is adaptively arranged to support the engine room section, so that the engine room section can be smoothly loaded and assembled into the whole section, and then the first I-beam and the second I-beam are used to combine the tire frame formed by the large door frame and the engine room section into a rigid whole, so that the engine room section can be transported stably, and the deformation of irregular parts of the engine room section during the assembly and transportation of the whole section is avoided, so that the whole section can be built and loaded with high quality and high efficiency, thereby reducing the difficulty of ship construction.

[0026] 2. The method for off-site assembly of the full-width cabin section is to use simple materials to process eight split large gate frames in an off-site site according to the cabin section data, use the eight large gate frames to make corresponding adjustments according to the lifting positions of the cabin sections, and assist in fine-tuning the assembly of the cabin sections. Finally, a flatbed truck can be used to transport the large gate frames that are combined into a cabin section frame. The off-site assembly of the cabin section can be completed without other complex auxiliary mechanisms, which effectively reduces material input and site occupancy and realizes the multi-purpose application of tooling. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic diagram of the overall structure of the overall section of the nacelle;

[0028] Figure 2 This is a schematic diagram of the typical rib position structure of the invention;

[0029] Figure 3 To invent a schematic diagram of the placement and arrangement of the gate frame;

[0030] Figure 4 A schematic diagram of the rigid fixing structure of the invented large door frame;

[0031] Figure 5 The present invention is a schematic diagram of the structure of a large door frame.

[0032] In the figure: 100, gate frame; 101, frame; 102, support leg; 200, cabin section; 201, first section; 202, second section; 300, support; 400, pier; 500, channel steel; 600, first I-beam; 700, second I-beam; 800, flatbed truck. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the invention to clearly and completely describe the technical solutions in the embodiments of the invention. Obviously, the described embodiments are only part of the embodiments of the invention, not all of the embodiments. Based on the embodiments in the invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the invention.

[0034] See also Figure 1-5 A method for remote assembly of a full-width nacelle section, wherein the remote assembly mechanism comprises: a large mast 100 and a nacelle section 200;

[0035] The cabin section 200 includes a second section 202 hoisted and placed on the large door frame 100, and a first section 201 which is combined with the second section 202 in sections.

[0036] A support 300 is provided on the large door frame 100, and the support 300 is located at the suspended part of the cabin section 200. A pier 400 is provided at the rib position of the cabin section 200 and the place where the large door frame 100 is placed. A first I-beam 600 and a second I-beam 700 are respectively installed at both ends of the large door frame 100. A flatbed car 800 is traveling at the bottom of the large door frame 100, and a channel steel 500 is welded at the bottom of the cabin section 200.

[0037] The steps of off-site grouping include:

[0038] S1, using steel materials to weld and assemble in a remote site to form a gate frame 100 as a general assembly tooling structure;

[0039] S2, arranging the large door frame 100 in a remote site according to the size of the cabin segments, and installing piers 400 on the large door frame 100 according to the lifting position of the cabin segments to place the lower end surface of the segments, thereby completing the lifting of the segments;

[0040] S3, welding the lower end surface of the cabin segment to the gate frame 100 by setting the channel steel 500, and setting the support 300 at the bottom of the suspended part of the cabin segment deck;

[0041] S4, using a flatbed truck 800 to carry and assemble the first segment 201 and the second segment 202 fixed on the large door frame 100 into the cabin section 200, and then installing the first I-beam 600 and the second I-beam 700 on the large door frame 100, so that the large door frame 100 is fixed in position after arrangement;

[0042] S5, using a flatbed truck 800 to lift the assembled nacelle section 200, and transport it from the off-site site to the assembly site for assembly.

[0043] Among them, eight large portal frames 100 are arranged in the assembly site, and the eight large portal frames 100 are divided into four groups in an axially symmetrical manner with the center line of the deck of the cabin section 200 as the axis and are respectively placed at the bottom of the first section 201 and the second section 202. The large portal frames 100 are arranged as eight segmented brackets as a tooling structure. When the first section 201 and the second section 202 are hoisted, they can be adjusted in time according to the hoisting conditions at any time, and the effect of adjusting the assembly position can be achieved during the assembly of the first section 201 and the second section 202, so as to achieve the purpose of multi-purpose application.

[0044] Among them, the first I-beams 600 installed on the two large portal frames 100 with symmetrical ends are connected as a whole, and the first I-beam 600 and the second I-beam 700 rigidly fix the large portal frames 100 that are in contact along the longitudinal path. After the first section 201 and the second section 202 are assembled, the eight large portal frames 100 located under the cabin section 200 can be connected into an integral frame by using the installation of the first I-beam 600 and the second I-beam 700, so as to rigidly fix the irregular parts of the cabin section 200, improve the stability of the off-site assembly of the cabin section 200, and reduce the risk of deformation in subsequent transportation.

[0045] Among them, the large portal frame 100 includes a frame body 101 and support legs 102. The frame body 101 is a frame-like tabletop structure welded with steel, and the support legs 102 are integrally arranged at both ends of the frame body 101. The large portal frame 100 as a whole only uses steel welded from a remote site to form a prototype of the frame. With its simple processing procedure and body shape, it can complete a variety of auxiliary capabilities, effectively reducing material input and site occupancy.

[0046] Among them, the channel steel 500 is connected to the cabin section 200 and the large portal frame 100 by a sealing welding process. The sealing welding process is used to improve the stability of the combination of the cabin section 200 and the large portal frame 100. Compared with bolt installation, it can effectively avoid the loosening of the structure during the construction period, and improve the strength and durability of the cabin section 200 structure.

[0047] Among them, in S3, the segment positioning strictly determines the margin value according to the rib position reference line in the segment. For each large joint of the segment, the rib distance is increased by 5 to 8m for welding compensation. At the same time, the rib distance of the large joint is controlled between ±15m. In order to ensure that the shape and size of the components, segments and cabins after assembly and welding can meet the requirements of allowable errors, some edges of the parts are not cut according to the theoretical size during cutting, but some values ​​are added beyond the theoretical value to make the welding shrinkage in the mounting stage within the control range, and finally the margin is cut off.

[0048] Among them, in S3, the joint position of the first section 201 and the second section 202 is located at a straight part of the cabin section with a smaller curvature, and the joint of the first section 201 and the second section 202 is set within the same rib spacing. Finding a straight part as the joint is conducive to maximizing the use of semi-automatic or automatic welding processes and making welding more convenient. At the same time, setting the joint within the same rib spacing can control welding deformation to a certain extent, which is conducive to joint operation.

[0049] Among them, in S4, the division of the engine room section 200 is based on the hull, and the number of sections is expanded. The main deck, anchor hole and bulwark are all completed in the section stage. Before the engine room section 200 is assembled and loaded, some necessary structures can be loaded and processed in advance to achieve the effect of simultaneous construction in multiple locations, which can save a lot of re-loading time in the subsequent assembly and shorten the construction period.

[0050] Among them, in S4, the joint seam between the outer plates of the first section 201 and the second section 202 of the cabin should be welded with a transverse weld along the width of the cabin first, and then with a longitudinal weld. When welding the joint between the first section 201 and the second section 202, first weld the transverse weld along the width of the cabin to preliminarily constrain the first section 201 and the second section 202. After the first section 201 and the second section 202 are combined by transverse welding, the longitudinal welds at the uneven details left at the joint are gradually welded to facilitate operation and control welding deformation.

[0051] Among them, in S5, the large portal frame 100 is welded and supported on the bottom of the cabin section 200 through a tire frame formed by a combination of supports 300, piers 400 and channel steels 500, and then lifted and supported by a flatbed truck 800 through the bottom of the large portal frame 100 for land transportation. According to the situation of the cabin section 200, the supports 300, piers 400 and the large portal frame 100 are used to form a tire frame, and the large portal frame 100 is adaptively arranged to support the cabin sections, so that the cabin sections can be smoothly loaded and combined into a section, and the first I-beam 600 and the second I-beam 700 are used to combine the tire frame formed by the large portal frame 100 and the cabin section 200 into a rigid whole, so that the cabin section 200 can be stably transported.

[0052] Although embodiments of the invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the invention, and the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. The method of remote assembly of full-width engine room section, the remote assembly mechanism includes: A large mast (100) and a cabin section (200); The cabin section (200) comprises a second section (202) hoisted and placed on a large door frame (100), and a first section (201) which is combined with the second section (202) in sections. The gate frame (100) is provided with a support (300), the support (300) is located at a suspended position of the cabin section (200), a buttress (400) is provided at the rib position of the cabin section (200) and the place where the gate frame (100) is placed, a first I-beam (600) and a second I-beam (700) are respectively installed at both ends of the gate frame (100), a flatbed car (800) travels at the bottom of the gate frame (100), and a channel steel (500) is welded at the bottom of the cabin section (200); The characteristic is that the steps of the remote grouping include: S1, using steel materials to weld and assemble in a remote site to form a gate frame (100) as a general assembly tooling structure; S2, arranging the large portal frame (100) in a remote site according to the size of the cabin segments, and installing piers (400) on the large portal frame (100) according to the lifting positions of the cabin segments to place the lower end surfaces of the segments, thereby completing the lifting of the segments; S3, welding the lower end surface of the cabin segment to the gate frame (100) by arranging channel steel (500), and arranging a support (300) at the bottom of the suspended part of the cabin segment deck; S4, using a flatbed truck (800) to carry and assemble the first section (201) and the second section (202) fixed on the large portal frame (100) into a cabin section (200), and then installing the first I-beam (600) and the second I-beam (700) on the large portal frame (100) so that the large portal frame (100) is fixed in position after being arranged; S5, using a flatbed truck (800) to lift the assembled cabin section (200), and transport it from a remote site to an assembly site for assembly.

2. The method for remote assembly of full-width nacelle sections according to claim 1, characterized in that: Eight large portal frames (100) are arranged in the assembly site, and the eight large portal frames (100) are divided into four groups in an axially symmetrical manner with the deck center line of the cabin assembly section (200) as the axis, and are respectively placed at the bottom of the first section (201) and the second section (202).

3. The method for remote assembly of full-width nacelle sections according to claim 2, characterized in that: The first I-beams (600) installed on the two large gate frames (100) with symmetrical ends abutting against each other are connected as a whole, and the first I-beam (600) and the second I-beam (700) rigidly and fixedly connect the large gate frames (100) that are in contact along a longitudinal path.

4. The method for remote assembly of full-width nacelle sections according to claim 1, characterized in that: The gate frame (100) comprises a frame body (101) and supporting legs (102); the frame body (101) is a frame-shaped tabletop structure welded from steel materials; and the supporting legs (102) are integrally arranged at both ends of the frame body (101).

5. The method for remote assembly of full-width nacelle sections according to claim 1, characterized in that: The channel steel (500) is connected to the cabin main section (200) and the gate frame (100) by using a sealing welding process.

6. The method for remote assembly of full-width nacelle sections according to claim 1, characterized in that: In S3, the segment positioning is strictly based on the rib position reference line in the segment to determine the margin value. For each large joint in the segment, the rib spacing is increased by 5 to 8 meters for welding compensation. At the same time, the rib spacing of the large joint is controlled between ±15 meters.

7. The method for remote assembly of full-width nacelle sections according to claim 1, characterized in that: In S3, the joint position of the first segment (201) and the second segment (202) is located at a straight portion of the cabin segment with a smaller curvature, and the joint of the first segment (201) and the second segment (202) is arranged within the same rib spacing.

8. The method for remote assembly of full-width nacelle sections according to claim 1, characterized in that: In said S4, the engine room block (200) is divided into sections based on the hull, the number of sections is increased, and the main deck, anchor hole and bulwark are all completed in the block stage.

9. The method for remote assembly of full-width nacelle sections according to claim 1, characterized in that: In the above S4, the butt joints between the first section (201) and the second section (202) of the cabin section outer plates should first be welded with a transverse weld along the cabin width, and then with a longitudinal weld.

10. The method for remote assembly of full-width nacelle sections according to claim 1, characterized in that: In S5, the large portal frame (100) is welded to a frame formed by a combination of supports (300), piers (400) and channel steels (500) and supported on the bottom of the cabin section (200), and then lifted and supported by a flatbed truck (800) through the bottom of the large portal frame (100) for land transportation.

Images