A method for constructing a non-water-tight compartment of a large container ship

Abstract

The application discloses a large container ship non-waterproof partition construction method, comprising the following steps: S1, taking a hatch coaming top plate as a base surface, welding a transverse reinforcing rib, sequentially welding a top thickened longitudinal girder plate, binding a bridge and a transverse support block reverse top reinforcing rib and a knee plate, positioning a pin backing plate, reinforcing a channel steel, and forming a hatch coaming small group; S2, taking a transverse bulkhead rear wall as a base surface, installing a longitudinal girder plate and a deck platform plate, and forming a rear transverse bulkhead small group; S3, taking the transverse bulkhead front wall as a base surface, installing the hatch coaming small group and the transverse bulkhead small group, sequentially installing a deck upper longitudinal girder and a platform component, and performing turning welding to form a transverse bulkhead middle group; S4, pre-burying a stern guide rail, taking the transverse bulkhead middle group as a stern base surface upper jig, and performing scattered welding on the longitudinal girder and the platform component to form a complete section; and S5, welding a bow end guide rail frame and sending paint for coating. The application can reduce the turning frequency of the partition, reduce the channel steel usage, save a large amount of manpower and material resources, and improve the construction efficiency and precision of the non-waterproof partition.

Description

Technical Field

[0001] This invention belongs to the field of shipbuilding technology and relates to a method for constructing non-watertight compartments in large container ships. Background Technology

[0002] The non-watertight compartments of large container ships, due to their structural characteristics, were originally constructed in two mid-sections: the upper transverse bulkhead mid-section and the lower longitudinal girder platform mid-section. Due to space constraints, the need to save on jigs, and the avoidance of overhead welding, the upper transverse bulkhead mid-section previously required two turning operations, increasing labor costs and posing safety risks. For the lower longitudinal girder platform mid-section, to prevent deformation during transport and hoisting and to ensure accuracy, channel steel reinforcement was installed around its perimeter after construction. The subsequent removal of these channel steel sections not only generated significant labor time but also increased material costs for the shipyard. In conclusion, in today's shipbuilding industry, which prioritizes precision and low cost, these factors all contribute to increased shipbuilding cycles and higher production costs.

[0003] In the prior art, Chinese invention patent 202111133494.7 discloses a double-sided pre-assembly method for compartment guide rails on large container ships. This method is only for pre-assembly of guide rails. This invention is a research and innovation on the pre-assembly process of guide rails, which is different from the pre-assembly of guide rails in that application, which only solves the problem of accuracy. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a method for constructing non-watertight compartments of large container ships. This invention can make reasonable use of the site, save on jigs and reduce the number of times non-watertight compartments are turned over, reduce the amount of channel steel used, save a lot of manpower and material resources, and improve the construction efficiency and accuracy of non-watertight compartments.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solution:

[0006] A method for constructing non-watertight compartments in a large container ship includes the following steps:

[0007] S1, Hatch Cofferdam Construction Team;

[0008] S2, the stern bulkhead construction team;

[0009] S3, construct the upper transverse bulkhead mid-assembly;

[0010] S4, the stern guide rail is pre-embedded in place, the upper transverse bulkhead middle group and the lower longitudinal girder platform component are joined together, the upper transverse bulkhead middle group is joined together with the girder on the stern base surface, and the lower longitudinal girder platform middle group is formed into a complete non-watertight compartment section by bulk welding.

[0011] S5, weld the bow guide rail frame, and send the non-watertight compartments to be painted in sections.

[0012] A further preferred technical solution, the method for constructing the hatch coaming group, includes the following steps:

[0013] S11, The hatch coaming top plate is assembled with submerged arc welding plates and installed on flat ground with the frame facing upwards;

[0014] S12, using the hatch cofferdam top plate as the base surface, use an automatic fillet welder to weld the transverse reinforcing ribs of the hatch cofferdam top plate, and weld the longitudinal thickening plate, elbow plate, support block reinforcing ribs and positioning pin pads in sequence according to the markings, and reinforce with channel steel to form a hatch cofferdam group.

[0015] S13, on both sides of the hatch coaming assembly, reinforced channel steel is installed on the longitudinal thickening plate and elbow plate of the hatch coaming top to reinforce the entire hatch coaming assembly. It is then transported to the field by trailer for mid-assembly installation. The reinforced channel steel is removed before installation.

[0016] In a further preferred technical solution, in step S12, a special card plate is provided for angle positioning of the support block reinforcing rib. The special card plate is a right-angled triangle. The right-angled side of the special card plate is in contact with the vertical angle formed by the hatch coaming top plate and the horizontal reinforcing rib of the hatch coaming top plate. The support block reinforcing rib is perpendicularly in contact with the inclined side of the special card plate. The lower end of the special card plate is fully fillet welded to the hatch coaming top plate.

[0017] A further preferred technical solution is that step S2, the stern bulkhead assembly, includes stern bulkhead panels, stern bulkhead longitudinal girder, and a second deck platform. The construction method of the stern bulkhead assembly includes the following steps:

[0018] S21, mark the stern bulkhead panels with submerged arc welding plates, and weld the transverse angle steel of the stern bulkhead with an automatic fillet welder;

[0019] S22, using the stern bulkhead as the base surface, the stern bulkhead longitudinal girder and the second deck platform are welded sequentially according to the markings. After the fillet welding is completed, the stern bulkhead group is formed and transported to the field by trailer for mid-assembly installation.

[0020] A further preferred technical solution, the construction method of the upper transverse bulkhead assembly, includes the following steps:

[0021] S31, Submerged arc welding is used to assemble and mark the bow bulkhead panels, and an automatic fillet welder is used to weld the transverse angle steel of the bow bulkhead;

[0022] S32, hoist the bow bulkhead and the bow rib of the second deck that were welded in step S31 onto the flat jig, make accurate positioning, and hoist the hatch coaming top plate, stern bulkhead, longitudinal girder on the second deck, platform on the second deck, and second deck group in sequence, and weld the butt welds, flat and vertical fillet welds respectively.

[0023] S33, install the locating pin thickening plate and locating pin to form the upper transverse bulkhead middle assembly;

[0024] S34, turn the upper transverse bulkhead middle group over and weld the original overhead welds.

[0025] In a further preferred technical solution, in step S32, the positioning pin is pre-installed on the main sections of the non-watertight compartment.

[0026] A further optimized technical solution involves using a jig on the stern base surface for the upper transverse bulkhead assembly, and then using a component assembly method on the lower longitudinal girder platform to install the main assembly in the non-watertight compartment.

[0027] The non-watertight compartment construction method for large container ships of the present invention has achieved the following beneficial effects in shipbuilding practice:

[0028] (1) The present invention provides a method for constructing non-watertight compartments of large container ships, which uses special clamps for installing support block reinforcing ribs to assist on-site construction personnel in positioning, and can not only improve work efficiency, but also increase installation accuracy.

[0029] (2) The present invention provides a method for constructing non-watertight compartments for large container ships. This method eliminates the need to combine the hatch coaming group and the bulkhead group into a secondary intermediate group, thereby reducing the number of jigs used in the shipyard, increasing the utilization rate of jigs, and saving space. Furthermore, by using the bow bulkhead of the transverse bulkhead as the base surface for constructing the intermediate group, the number of times the compartments are turned over can be reduced, thus improving construction efficiency.

[0030] (3) The present invention provides a method for constructing non-watertight compartments of large container ships, which advances the installation process of non-watertight compartment positioning pins to the sectional installation stage, thereby saving the damage caused by painting in the later stage, reducing safety risks, and improving construction efficiency.

[0031] (4) The present invention provides a method for constructing non-watertight compartments of large container ships. The lower frame of the non-watertight compartment is assembled and installed in pieces, which can reduce the use of channel steel, reduce the time spent on installation, dismantling and grinding of channel steel, reduce production costs and improve construction efficiency. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0033] Figure 1 A three-dimensional schematic diagram of the hatch coaming group for a method of constructing non-watertight compartments in a large container ship.

[0034] Figure 2 This is a plan view showing the installation angle of the reinforcing ribs of the hatch coaming support block in a construction method for non-watertight compartments of a large container ship.

[0035] Figure 3 This is a schematic diagram of the installation method of the hatch coaming support block reinforcing ribs in a construction method for non-watertight compartments of a large container ship.

[0036] Figure 4 This is a three-dimensional schematic diagram of the stern bulkhead assembly in a method for constructing non-watertight compartments in a large container ship.

[0037] Figure 5 This is a schematic diagram of the installation of the upper transverse bulkhead in a construction method for non-watertight compartments of a large container ship.

[0038] Figure 6 This is a three-dimensional schematic diagram of the upper transverse bulkhead assembly in a method for constructing non-watertight compartments of a large container ship.

[0039] Figure 7 This is a schematic diagram of the installation of a large watertight compartment assembly, representing a construction method for non-watertight compartments in large container ships.

[0040] Figure 8 This is a three-dimensional schematic diagram of a non-watertight compartment in a method for constructing non-watertight compartments for large container ships.

[0041] Figure 9 This is a construction flowchart for a method of constructing non-watertight compartments in a large container ship.

[0042] The labels in the diagram are as follows:

[0043] 1-Hatch coaming assembly, 11-Hatch coaming top plate, 12-Hatch coaming top transverse reinforcing rib, 13-Hatch coaming top longitudinal thickening plate, 14-Elbow plate, 15-Support block reinforcing rib, 16-Locking pin pad, 17-Reinforcing channel steel, 18-Special clamping plate, 2-Stern bulkhead assembly, 21-Stern bulkhead plate, 22-Stern bulkhead transverse angle steel, 23-Stern bulkhead longitudinal girder, 24-Deck platform 3-Upper transverse bulkhead mid-section, 31-Bow bulkhead plate, 32-Bow bulkhead transverse angle steel, 33-Second deck longitudinal girder, 34-Second deck platform, 35-Second deck bow rib component, 36-Second deck group, 37-Positioning pin thickened plate, 41-Lower longitudinal girder, 42-Lower platform, 43-Stern guide rail frame, 44-Bow guide rail frame, 5-Flat jig, 6-Positioning pin. Detailed Implementation

[0044] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0045] The present invention will be further described in detail below with reference to the accompanying drawings and specific examples, but this should not be construed as limiting the scope of protection of the present invention.

[0046] This invention discloses a method for constructing non-watertight compartments in large container ships. The non-watertight compartment includes an upper transverse bulkhead assembly 3, a lower longitudinal girder 41, and a lower platform 42. The upper transverse bulkhead assembly 3 includes a hatch coaming assembly 1, a stern bulkhead assembly 2, a bow bulkhead 31, a second deck bow rib assembly 35, a second deck upper longitudinal girder 33, a second deck upper platform 34, and a second deck assembly 36. This invention can make reasonable use of the site, save on jigs and reduce the number of times the non-watertight compartment is turned over, reduce the amount of channel steel used, save a lot of manpower and material resources, and improve the construction efficiency and accuracy of non-watertight compartments.

[0047] This embodiment provides a method for constructing non-watertight compartments in large container ships, including the following steps:

[0048] S1, Hatch Cofferdam Construction Team;

[0049] like Figure 1 As shown, the hatch coaming top plate 11 is assembled using submerged arc welding, and the installation lines are marked on flat ground with the frame side facing upwards. The hatch coaming top transverse reinforcing ribs 12 are then welded using an automatic fillet welder.

[0050] Using the hatch coaming top plate 11 as the base surface, weld the longitudinal thickening plate 13, elbow plate 14, support block reinforcing rib 15, and locating pin pad 16 sequentially according to the marked lines. Figure 2 As shown, the support block reinforcing rib 15 has a fixed installation angle. For quick positioning, a special mounting plate 18 for the support block reinforcing rib can be used for angle positioning. Figure 3 As shown, the right-angled edge of the special mounting plate 18 for the support block reinforcing ribs is fitted with the vertical angle formed by the hatch coaming top plate 11 and the hatch coaming transverse reinforcing ribs 12. Then, the support block reinforcing ribs 15 are vertically attached to the inclined edge, and the lower end is fully fillet welded to the hatch coaming top plate 11. The use of the special mounting plate 18 for the support block reinforcing ribs 15 not only reduces the positioning steps for on-site construction personnel but also increases work efficiency and improves installation accuracy.

[0051] On both the bow and stern sides of hatch coaming group 1, reinforcing channel steel 17 is installed on the longitudinal thickening plate 13 and elbow plate 14 of the hatch coaming top to reinforce the entire hatch coaming group 1, as follows. Figure 1 As shown, the components are transported to the field by trailer for mid-stage assembly. Before installation, the reinforcing channel steel 17 is cut off. The hatch coaming top plate 11 of hatch coaming group 1 has many small structures, resulting in a large amount of welding work and making it difficult to control the overall accuracy. Adding the reinforcing channel steel 17 can improve the construction accuracy of hatch coaming group 1.

[0052] S2, the stern bulkhead construction team;

[0053] The stern bulkhead 21 is marked with submerged arc welding plates, and the transverse angle steel 22 of the stern bulkhead is welded with an automatic fillet welder.

[0054] like Figure 4 As shown, using the stern bulkhead panel 21 as the base surface, the stern bulkhead longitudinal girder 23 and the deck platform 24 are welded sequentially according to the marked lines. After the fillet welds are completed, the stern bulkhead assembly 2 is formed and transported to the field by trailer for mid-assembly installation.

[0055] The bow bulkhead 31 is assembled and marked with submerged arc welding, and the transverse angle steel 32 of the bow bulkhead is welded by an automatic fillet welder.

[0056] By disassembling the hatch coaming group 1 and the stern bulkhead group 2 into separate sub-groups, shipyard construction space and jigs can be saved, and resource utilization efficiency can be improved.

[0057] S3, construct the upper transverse bulkhead mid-assembly; the upper transverse bulkhead mid-assembly includes a bow bulkhead component 31, a second deck bow rib component 35, a second deck upper longitudinal girder 33, a second deck upper platform 34, and a second deck group 36.

[0058] The bow bulkhead 31 component, welded by S6, and the bow rib component 35 of the second deck are hoisted onto the flat jig 5. Precision positioning is ensured. Then, the hatch coaming 11, stern bulkhead 11, longitudinal girder 33 of the second deck, platform 34 of the second deck, and second deck crew 36 are hoisted sequentially. Figure 5 As shown. Butt welds, planar and vertical fillet welds are performed. Finally, the locating pin thickened plate 37 and locating pin 6 are installed to form the upper transverse bulkhead assembly 3, as shown. Figure 6 As shown, the upper transverse bulkhead group 3 was finally turned over, and the original overhead weld was welded.

[0059] S4, the stern guide rail is pre-embedded in place, and the upper transverse bulkhead mid-assembly and the lower longitudinal girder platform components are assembled on the jig. The upper transverse bulkhead mid-assembly 3 is jig on the stern base surface, and the lower longitudinal girder platform components are formed into complete non-watertight compartment sections through bulk welding. The upper transverse bulkhead mid-assembly 3 is constructed with the bow end face as the base surface. On-site, only one hoisting and turning is required to enter the large assembly installation from the stern end face, and overhead welding can be avoided when welding the hatch coaming group 1 and the stern bulkhead group 2.

[0060] S5, weld the bow guide rail frame, and paint the non-watertight compartments in sections. Set up a flat jig 5, pre-embed the stern guide rail frame 43 in place, and hoist the upper transverse bulkhead assembly 3 using the stern face as the base. Then, hoist the lower longitudinal girder 41 and lower platform 42 sequentially from the center outwards and from top to bottom. Figure 7 As shown, the bow guide rail frame 44 is finally installed in place, forming a non-watertight compartment, as... Figure 8 As shown.

[0061] In this embodiment, the positioning pin 6 is installed in advance, which can better control the accuracy of the positioning pin 6, saves the trouble of damaging the paint and making it difficult to control the accuracy during later installation in the dock, and also reduces the danger of high-altitude operations in the dock.

[0062] The lower longitudinal girder platform components are directly installed in the main assembly in a loose manner, which not only saves the time and material costs of channel steel reinforcement, but also makes full use of the advantages of the main assembly site, greatly improving construction efficiency.

[0063] The above is merely one implementation of this invention. Other similar methods and structural substitutions can be made based on the same idea, and are not limited to the steps and structural components already described. In summary, the scope of protection of this invention also includes other variations and substitutions that are obvious to those skilled in the art.

Claims

1. A method for constructing non-watertight compartments in a large container ship, characterized in that, Includes the following steps: S1, Hatch Cofferdam Construction Team: S11, The hatch coaming top plate is assembled with submerged arc welding plates and installed on flat ground with the frame facing upwards; S12, using the hatch cofferdam top plate as the base surface, use an automatic fillet welder to weld the transverse reinforcing ribs of the hatch cofferdam top plate, and weld the longitudinal thickening plate, elbow plate, support block reinforcing ribs and positioning pin pads in sequence according to the markings, and reinforce with channel steel to form a hatch cofferdam group. S13, On both sides of the hatch coaming group, reinforced channel steel is installed on the longitudinal thickening plate and elbow plate of the hatch coaming top to reinforce the entire hatch coaming group. It is then transported to the field by trailer for mid-assembly installation. The reinforced channel steel is cut off before installation. S2, the stern bulkhead construction team; S3, construct the upper transverse bulkhead mid-assembly, the method for constructing the upper transverse bulkhead mid-assembly includes the following steps: S31, Submerged arc welding is used to assemble and mark the bow bulkhead panels, and an automatic fillet welder is used to weld the transverse angle steel of the bow bulkhead; S32, hoist the bow bulkhead and the bow rib of the second deck that were welded in step S31 onto the flat jig, make accurate positioning, and hoist the hatch coaming top plate, stern bulkhead, longitudinal girder on the second deck, platform on the second deck, and second deck group in sequence, and weld the butt welds, flat and vertical fillet welds respectively. S33, install the locating pin thickening plate and locating pin to form the upper transverse bulkhead middle assembly; S34, turn the upper transverse bulkhead middle group over and weld the part of the weld that was originally welded overhead. S4, the stern guide rail is pre-embedded in place, the upper transverse bulkhead middle group and the lower longitudinal girder platform component are joined together to form a complete non-watertight compartment section. The upper transverse bulkhead middle group is mounted on the stern base surface, and the lower longitudinal girder platform component is installed in the non-watertight compartment in a piecewise assembly manner. S5, weld the bow guide rail frame, and send the non-watertight compartments to be painted in sections.

2. The method for constructing non-watertight compartments of a large container ship according to claim 1, characterized in that, In step S12, a special card plate is provided for angle positioning of the support block reinforcing rib. The special card plate is a right triangle. The right angle side of the special card plate is in contact with the vertical angle formed by the hatch coaming top plate and the horizontal reinforcing rib of the hatch coaming top plate. The support block reinforcing rib is perpendicularly in contact with the inclined side of the special card plate. The lower end of the special card plate is fully fillet welded to the hatch coaming top plate.

3. The method for constructing non-watertight compartments of a large container ship according to claim 1, characterized in that, The stern bulkhead assembly in step S2 includes stern bulkhead panels, stern bulkhead longitudinal girder, and a second deck platform. The construction method of the stern bulkhead assembly includes the following steps: S21, mark the stern bulkhead panels with submerged arc welding plates, and weld the transverse angle steel of the stern bulkhead with an automatic fillet welder; S22, using the stern bulkhead as the base surface, the stern bulkhead longitudinal girder and the second deck platform are welded sequentially according to the markings. After the fillet welding is completed, the stern bulkhead group is formed and transported to the field by trailer for mid-assembly installation.

4. The method for constructing non-watertight compartments of a large container ship according to claim 1, characterized in that, In step S32, the positioning pin is pre-installed on the main sections of the non-watertight compartment.

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