Installation method of outward floating type subsection

Abstract

The invention relates to the technical field of ship construction, and discloses an outward floating type section installation method which comprises the following steps: S1, designing a slow installation area for each transverse structure of an outward floating type section in a production design stage; s2, determining the closure allowance of the closure opening of the outward floating type section and the adjacent section through a simulation carrying technology, and trimming and cutting the closure allowance of the outward floating type section and the adjacent section; s3, hangers are arranged on the outer floating type sections, and the hangers are symmetrically distributed with the center line of the bow and the center line of the stern of the outer floating type sections as the axis; and S4, folding and welding the outward floating type sections, welding a structural plate in the slow mounting area, and performing embedded corner connection on the structural plate and the side outer plate. The installation sequence of a slow installation area is changed, the position deviation between a transverse structure of the outward-floating type section and a broadside outer plate is compensated, meanwhile, the allowance of a closure opening is repaired and cut in advance through the simulated carrying technology, the positioning time during carrying is shortened, the time for adjusting the level during installation of the large outward-floating type section is shortened through symmetrical distribution of the hangers, and the purpose of rapid installation is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of shipbuilding, and particularly to a method for installing an outboard floating section. Background Art

[0002] On a conventional ship type, the width of the deck surface at the upper deck is basically the same as the ship width at the waterline. In order to increase the working area on the deck, some ships are provided with outboard floating sections at the bow and stern, so as to form an outboard floating deck between the bow and stern, thereby increasing the working area of the ship deck and meeting the working requirements of special ship types.

[0003] The center of gravity of the outboard floating section is outside the outer plate of the ship's side. The lower end of the section is a ramp plate with a large slope. The connection between the lower end of the outboard floating section and the outer plate of the ship's side is an embedded angle joint form, that is, the lower end of the section is embedded in the outer plate of the ship's side, and there is an included angle between the lower end of the section and the outer plate of the side. The connection between the two is not smooth, resulting in an included angle between the transverse wall plates and the platform plates inside the outboard floating section. There are a large number of transverse wall plates inside the section, and it is necessary to ensure that each transverse wall plate is embedded in the outer plate of the side before ensuring the lap joint.

[0004] During the hoisting process of the outboard floating section, affected by factors such as the deviation of the center of gravity, wind force, and the rising of the lifting hook, the outboard floating section cannot be in an absolutely horizontal state. Slight inclination will prevent the outboard floating section from being embedded and connected, resulting in great difficulty in installing and positioning large outboard floating sections, low installation efficiency, long overall ship erection cycle, and increased shipbuilding costs. Summary of the Invention

[0005] The purpose of the present invention is to provide a method for installing an outboard floating section to solve the problems of great difficulty in positioning and low installation efficiency of the outboard floating section in the prior art.

[0006] To achieve the above purpose, the present invention provides a method for installing an outboard floating section, including the following steps:

[0007] S1. During the production design stage, slow-installation areas are designed for each transverse structure of the outboard floating section. The slow-installation areas correspond to the outer plates of the ship's side and are used to avoid the outer plates of the side;

[0008] S2. Through the simulation erection technology, the closing allowance of the closing joint between the outboard floating section and the adjacent section in step S1 is determined, and the outboard floating section in step S1 is corrected according to the determined value of the closing allowance, and the closing allowance of the closing joint between the outboard floating section and the adjacent section is trimmed;

[0009] S3. Lifting lugs are arranged on the outboard floating section, and the lifting lugs are axially symmetrically distributed with respect to the center line of the bow and stern of the outboard floating section;

[0010] S4. Use a gantry crane to hoist and install the outboard floating section, close and weld the outboard floating section to the adjacent section, weld the structural plate in the slow-installation area, and the structural plate is embedded and fillet welded to the side shell plating.

[0011] Preferably, in step S1, the slow-installation area is arranged at the connection between the transverse structure and the stiffener, and the slow-installation area is formed by opening avoidance holes on the stiffener and the transverse structure.

[0012] Preferably, the avoidance hole is semi-circular. In step S4, the structural plate is a semi-circular plate, and an avoidance groove is opened on the structural plate. Along the left-right direction of the hull, the width dimension of the avoidance groove is D, and the thickness dimension of the outer side of the side shell is H, satisfying: 5mm ≤ D - H ≤ 10mm.

[0013] Preferably, step S2 includes:

[0014] S2.1. Import the models of the outboard floating section and the adjacent section into the precision analysis software, and measure the theoretical data of the closing joint of the outboard floating section and the adjacent section;

[0015] S2.2. Select multiple measurement points at the closing joint of the outboard floating section and the adjacent section respectively, and use a total station to collect the actual position data of each measurement point;

[0016] S2.3. Input the actual position data into the precision analysis software and compare it with the theoretical data in step S2.1 to respectively obtain the first difference between the actual position data and the theoretical data of the closing joint of the outboard floating section, and the second difference between the actual position data and the theoretical data of the closing joint of the adjacent section;

[0017] S2.4. Compare the first difference and the second difference to obtain the actual margin of the closing joint, and trim the closing joint margin of the outboard floating section and the adjacent section according to the actual margin.

[0018] Preferably, in step S2.2, the distance between two adjacent measurement points is S, satisfying: S ≤ 500mm.

[0019] Preferably, in step S3, a total of three groups of lifting lugs are set. The first group of lifting lugs and the second group of lifting lugs are spaced apart in the fore-and-aft direction, and the first group of lifting lugs and the second group of lifting lugs are symmetrically arranged with respect to the center of gravity of the outboard floating section. The third group of lifting lugs and the first group of lifting lugs, the second group of lifting lugs are spaced apart in the left-right direction.

[0020] Preferably, in step S1, when building the outboard floating section, install quick pull codes at the closing joint on the deck of the outboard floating section.

[0021] Preferably, in step S1, when building the outboard floating section, install support seats on the fore-and-aft sides of the outboard floating section respectively, and the bottom plate of the support seat is parallel to the hull baseline.

[0022] Preferably, in step S4, when installing the outboard floating section, support stools are installed in advance on the ground. A spiral head is provided at the top of the support stools, and the support seat is located on the spiral head.

[0023] Compared with the prior art, the installation method of the outboard floating section in the embodiment of the present invention has the beneficial effects that: when designing the outboard floating section in production, a slow-installation area is designed on the transverse structure first. The structural plate is installed after the outboard floating section is hoisted and carried. By changing the installation sequence of the slow-installation area, even if the outboard floating section is not completely horizontal during hoisting and carrying, the slow-installation area can be used for the side shell plate to be embedded, compensating for the position deviation between the transverse structure of the outboard floating section and the side shell plate, avoiding interference between the two. At the same time, the simulation hoisting technology is used to trim the closing gap allowance in advance, reducing the positioning time during hoisting. After the lifting lugs are symmetrically distributed, the level of the outboard floating section can be quickly adjusted through the lifting lugs, ensuring that the outboard floating section is basically in a horizontal state after being lifted, reducing the time for adjusting the level during the installation of the large outboard floating section, achieving the purpose of rapid installation, and improving the installation efficiency of the outboard floating section. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a schematic structural diagram of the outboard floating section of the installation method of the outboard floating section of the present invention;

[0025] Figure 2 is Figure 1 an enlarged schematic structural diagram of the M position of the outboard floating section of;

[0026] Figure 3 is Figure 1 a top view of the closing gap between the outboard floating section of and the adjacent section;

[0027] Figure 4 is Figure 3 a schematic structural diagram of the outboard floating section of and the adjacent section after closing;

[0028] Figure 5 is a schematic structural diagram of the outboard floating section after being hoisted and carried in the installation method of the outboard floating section of the present invention;

[0029] Figure 6 is Figure 5 an enlarged schematic structural diagram of the K position of.

[0030] In the figure, 1. Outboard floating section, 2. Adjacent section, 3. Transverse structure, 4. Slow-installation area, 5. Closing gap, 6. Lifting lug, 7. Structural plate, 8. Side shell plate, 9. Rib plate, 10. Avoidance groove, 11. Measuring point, 12. Quick pull code, 13. Support seat, 14. Support stool, 15. Spiral head. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0031] The following will further describe in detail the specific implementation manners of the present invention in conjunction with the accompanying drawings and embodiments. The following embodiments are used to illustrate the present invention, but are not used to limit the scope of the present invention.

[0032] A preferred embodiment of the installation method for the outward-projecting segmented structure of the present invention is as follows Figures 1 to 6 shown. The installation method for the outward-projecting segmented structure includes the following steps:

[0033] S1. During the production design stage, slow-installation areas 4 are designed for each transverse structure 3 of the outward-projecting segment 1. The slow-installation areas 4 correspond to the side shell plates 8 of the hull, and the slow-installation areas 4 are used to avoid the side shell plates 8.

[0034] S2. Through the simulation and mating technology, the mating allowance at the mating joint 5 between the outward-projecting segment 1 and the adjacent segment 2 in step S1 is determined, and the outward-projecting segment 1 in step S1 is corrected according to the determined value of the mating allowance, and the mating allowance at the mating joint 5 between the outward-projecting segment 1 and the adjacent segment 2 is trimmed.

[0035] S3. Lifting lugs 6 are arranged on the outward-projecting segment 1, and the lifting lugs 6 are symmetrically distributed with respect to the center line of the bow and stern of the outward-projecting segment 1.

[0036] S4. The outward-projecting segment 1 is hoisted and mated by using a gantry crane. The outward-projecting segment 1 is joined and welded to the adjacent segment, and a structural plate 7 is welded in the slow-installation area 4. The structural plate 7 is embedded and angularly joined with the side shell plate 8.

[0037] In step S1, the transverse structure 3 of the slow-installation area 4 includes transverse wall plates, stiffeners 9, etc. The slow-installation area 4 is designed to leave a part of the structure not installed at the position corresponding to the side shell plate 8 of the transverse structure 3 for embedded angular joining during the segmented construction stage, forming a void. The void at this part of the structure can avoid the side shell plate 8 and prevent interference between the transverse structure 3 and the side shell plate 8 when the outward-projecting segment 1 is mated.

[0038] The outward-projecting segment 1 is large in size and heavy in weight. During the hoisting and installation process, affected by factors such as the deviation of the center of gravity of the segment, wind force, and asynchronous lifting of the lifting hooks, it is basically impossible to be in an absolutely horizontal state. Coupled with multiple sets of transverse structures 3 and ramp plates under the side shell plate 8, the segment cannot be inserted smoothly with a slight inclination. Setting the slow-installation area 4 can effectively solve the problem of difficult installation of the outward-projecting segment 1.

[0039] In step S2, through the simulation and mating technology, the mating allowance at the mating joint 5 between the outward-projecting segment 1 and the adjacent segment 2 can be trimmed in advance, avoiding trimming the mating allowance at the mating joint 5 during mating, that is, moving the process of trimming the mating allowance at the mating joint 5 forward, thereby saving the time for trimming the mating allowance at the mating joint 5 during the installation of the large outward-projecting segment 1, reducing the positioning time during mating, and achieving the purpose of rapid installation.

[0040] In step S3, the lifting lugs 6 are fixed to the deck of the outboard section 1 by welding. In this embodiment, according to the structural characteristics, weight and center of gravity of the outboard section 1 and the characteristics of the dock gantry crane, the lifting points are designed, and the lifting lugs 6 are welded to the corresponding lifting points, which can achieve the purpose of quickly adjusting the level of the section.

[0041] In step S4, after the hoisting and mating operation of the outboard section 1 is completed, the installation operation of the slow-installation area 4 is carried out. At this time, the installation between the side shell plate 8 and the transverse structure 3 has been completed, achieving the purpose of quickly installing the outboard section 1.

[0042] When designing the outboard section 1 in production design, the slow-installation area 4 is first designed on the transverse structure 3. After the section is mated, the structural plate 7 is installed in the slow-installation area 4, changing the installation sequence of the slow-installation area 4. Even if the outboard section 1 is not completely horizontal during hoisting and mating, the slow-installation area 4 can be used for the side shell plate 8 to be embedded, compensating for the position deviation between the transverse structure 3 and the side shell plate 8 of the outboard section 1, avoiding interference between the two. At the same time, the margin of the butting joint 5 is trimmed in advance by using the simulated mating technology, reducing the positioning time during mating. After the lifting lugs 6 are symmetrically distributed, the level of the outboard section 1 can be quickly adjusted through the lifting lugs 6, ensuring that the outboard section 1 is basically in a horizontal state after being lifted, reducing the time for adjusting the level during the installation of the large outboard section 1, achieving the purpose of quick installation, and improving the installation efficiency of the outboard section 1.

[0043] In some embodiments, in step S1, the slow-installation area 4 is arranged at the connection between the transverse structure 3 and the stiffener 9. The stiffener 9 and the transverse structure 3 are provided with relief holes to form the slow-installation area 4.

[0044] After the connection between the transverse structure 3 and the stiffener 9 is connected to the side shell plate 8, stress concentration occurs at the connection position of the three. Relief holes are opened here to form the slow-installation area 4, which has the function of releasing stress while ensuring the quick mating of the outboard section 1.

[0045] In some embodiments, the relief hole is semi-circular. In step S4, the structural plate 7 is a semi-circular plate. A relief groove 10 is opened on the structural plate 7. Along the left-right direction of the hull, the width dimension of the relief groove 10 is D, and the thickness dimension of the outside of the side shell is H, satisfying: 5mm ≤ D - H ≤ 10mm.

[0046] A relief groove 10 is opened on the structural plate 7. The relief groove 10 can be used for the side shell plate 8 to be embedded, so that an embedded corner joint structure is formed between the transverse structure 3 and the side shell plate 8. In this embodiment, the width dimension D of the relief groove 10 is 19mm, the thickness dimension H of the side shell plate 8 is 13mm, there is only a 6mm gap between the relief groove 10 and the side shell plate 8, and the included angle between the side shell plate 8 and the platform deck is 98°.

[0047] In some embodiments, step S2 includes:

[0048] S2.1, import the models of the overhanging segmented part 1 and the adjacent segmented part 2 into the precision analysis software, and measure the theoretical data of the joint 5 between the overhanging segmented part 1 and the adjacent segmented part 2;

[0049] S2.2, respectively select a plurality of measurement points 11 at the joint 5 between the overhanging segmented part 1 and the adjacent segmented part 2, and use a total station to collect the actual position data of each measurement point 11;

[0050] S2.3, input the actual position data into the precision analysis software and compare it with the theoretical data in step S2.1 to respectively obtain the first difference between the actual position data and the theoretical data of the joint 5 of the overhanging segmented part 1, and the second difference between the actual position data and the theoretical data of the joint 5 of the adjacent segmented part 2;

[0051] S2.4, compare the first difference and the second difference to obtain the actual allowance of the joint 5, and trim the allowance of the joint 5 between the overhanging segmented part 1 and the adjacent segmented part 2 according to the actual allowance.

[0052] In this embodiment, when collecting the actual position data of the measurement points 11, at least two people cooperate in the measurement. One person holds the light target and pastes it at the position of the joint 5 carried by the overhanging segmented part 1, and others use a total station to measure the data of the joint 5 at the position of the light target and record it. The total station measurement can obtain high-precision measurement results, and can be connected to devices such as a computer and a plotter through a transmission interface to cooperate with data processing to achieve automation.

[0053] In some embodiments, in step S2.2, the distance between two adjacent measurement points 11 is S, satisfying: S ≤ 500 mm.

[0054] Reducing the distance between the measurement points 11 can increase the number of measurement points 11 and improve the accuracy value of the actual position data of the measured joint 5. The distance between the measurement points 11 not being greater than 500 mm can ensure that the number of measurement points 11 is sufficient.

[0055] In some embodiments, in step S3, a total of three groups of hanging codes 6 are provided. The first group of hanging codes 6 and the second group of hanging codes 6 are spaced apart in the fore-and-aft direction, and the first group of hanging codes 6 and the second group of hanging codes 6 are symmetrically arranged with respect to the center of gravity of the overhanging segmented part 1. The third group of hanging codes 6 and the first group of hanging codes 6, the second group of hanging codes 6 are spaced apart in the left-right direction.

[0056] The first group of lifting lugs 6 and the second group of lifting lugs 6 are symmetrically arranged with respect to the center of gravity of the outward-projecting section 1. During hoisting, the hook connected to the first group of lifting lugs 6 and the second group of lifting lugs 6 can quickly adjust the level of the outward-projecting section 1 in the fore-and-aft direction; since the third group of lifting lugs 6 is spaced apart from the first group of lifting lugs 6 and the second group of lifting lugs 6 in the left-right direction, by adjusting the hook connected to the third group of lifting lugs 6, the level of the outward-projecting section 1 in the left-right direction can be quickly adjusted. Through the arrangement of the three groups of lifting lugs 6, it can be ensured that the outward-projecting section 1 is basically in a horizontal state after being lifted, which is convenient for positioning.

[0057] In this embodiment, each of the first group of lifting lugs 6 and the second group of lifting lugs 6 includes two lifting points and is spaced apart in the fore-and-aft direction of the section. The third group of lifting lugs 6 includes four lifting points, and the four lifting points are arranged in a rectangle and are symmetric about the center of gravity of the section in the fore-and-aft direction. Each of the first group of lifting lugs 6, the second group of lifting lugs 6, and the third group of lifting lugs 6 is connected to a crane to facilitate the adjustment of the section level.

[0058] In some embodiments, in step S1, when constructing the outward-projecting section 1, a quick pull code 12 is installed at the butt joint 5 on the deck of the outward-projecting section 1.

[0059] The quick pull code 12 can be used to assist the quick positioning of the outward-projecting section 1 and adjust the distance from the adjacent section 2 to achieve the purpose of quick installation. Installing the quick pull code 12 in advance in step S1 moves the process of the quick pull code 12 forward, avoiding installation during the mating stage, and can improve the efficiency during the mating of the outward-projecting section 1.

[0060] In some embodiments, in step S1, when constructing the outward-projecting section 1, support seats 13 are respectively installed on the fore-and-aft sides of the outward-projecting section 1, and the bottom plate of the support seat 13 is parallel to the hull baseline.

[0061] The support seat 13 can be supported on the ground foundation structure and can support the outward-projecting section 1 during hoisting and mating to prevent the outward-projecting section 1 from tipping over. The support seat 13 is installed in advance during the construction of the outward-projecting section 1 in step S1, that is, the process of installing the support seat is moved forward, saving time during the installation of the large outward-projecting section 1 and improving the mating efficiency.

[0062] In some embodiments, in step S4, when mating the outward-projecting section 1, a support bench 14 is installed in advance on the ground, and a spiral head 15 is provided at the top of the support bench 14, and the support seat 13 is seated on the spiral head 15.

[0063] Installing the support bench 14 in advance on the ground, the support bench 14 can vertically support the support seat 13 to prevent the outward-projecting section 1 from tipping over. The support bench 14 is installed in advance during the construction of the outward-projecting section 1 in step S1, that is, the process of installing the support bench is moved forward, saving time during the installation of the large outward-projecting section 1 and improving the mating efficiency.

[0064] In this embodiment, a screw head 15 is provided on the support stool 14. The screw head 15 can adjust the height up and down to match the assembly error between the support stool 14 and the support base 13. When adjusting the height of the screw head 15, the gantry crane lifts the overhanging section 1, and the construction workers adjust the height of the screw head 15 according to the horizontal differences in the front-back and left-right directions of the section measured by the total station. After the height of the screw head 15 is adjusted, the gantry crane lowers the overhanging section 1. The support base 13 is placed on the screw head 15. After welding the pull code to fix the section, the hook of the gantry crane is released, and the installation of the overhanging section 1 is completed.

[0065] In summary, the embodiment of the present invention provides an installation method for an overhanging section. When designing the overhanging section in production, a slow-installation area is first designed on the transverse structure. The structure plate is installed in the slow-installation area after the section is carried. By changing the installation sequence of the slow-installation area, even if the overhanging section is not completely horizontal during hoisting and carrying, the slow-installation area can provide an embedding space for the side shell plate, compensating for the position deviation between the transverse structure of the overhanging section and the side shell plate, avoiding interference between the two. At the same time, the simulation carrying technology is used to pre-cut the margin of the closing joint in advance, reducing the positioning time during carrying. After the lifting lugs are symmetrically distributed, the level of the overhanging section can be quickly adjusted through the lifting lugs, ensuring that the overhanging section is basically in a horizontal state after being lifted, reducing the time for adjusting the level during the installation of large overhanging sections, achieving the purpose of rapid installation, and improving the installation efficiency of the overhanging section.

[0066] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and replacements can still be made, and these improvements and replacements should also be regarded as the protection scope of the present invention.

Claims

1. An installation method for an outward floating segmented structure, characterized in that, It includes the following steps: S1. During the production design stage, slow-installation areas are designed for each transverse structure of the overhanging section. The slow-installation areas correspond to the side shell plates of the hull and are used to avoid the side shell plates. S2. Through simulation and mating technology, determine the mating allowance at the joint of the overhanging section and the adjacent section in step S1, and correct the overhanging section in step S1 according to the determined value of the mating allowance, and trim the mating allowance at the joint of the overhanging section and the adjacent section. S3. Set lifting lugs on the overhanging section. The lifting lugs are axially symmetrically distributed with respect to the bow-stern center line of the overhanging section. S4. Use a gantry crane to hoist and mate the overhanging section, weld the overhanging section to the adjacent section, and weld the structural plate in the slow-installation area. The structural plate is embedded and angle-connected to the side shell plate.

2. The installation method of the externally floating segmented type according to claim 1, characterized in that, In step S1, the slow-installation area is arranged at the connection between the transverse structure and the stiffener. Avoidance holes are opened on the stiffener and the transverse structure to form the slow-installation area.

3. The installation method of the externally floating segmented type according to claim 2, characterized in that The avoidance hole is semi-circular. In step S4, the structural plate is a semi-circular plate. An avoidance groove is opened on the structural plate. Along the left-right direction of the hull, the width dimension of the avoidance groove is D, and the thickness dimension of the outer side of the side shell is H, satisfying: 5mm ≤ D - H ≤ 10mm.

4. The installation method of the externally floating segmented type according to any one of claims 1 to 3, characterized in that, Step S2 includes: S2.

1. Import the models of the overhanging section and the adjacent section into the precision analysis software, and measure the theoretical data of the joint of the overhanging section and the adjacent section. S2.

2. Select multiple measurement points at the joint of the overhanging section and the adjacent section respectively, and use a total station to collect the actual position data of each measurement point. S2.

3. Input the actual position data into the precision analysis software and compare it with the theoretical data in step S2.1 to obtain the first difference between the actual position data and the theoretical data of the joint of the overhanging section and the second difference between the actual position data and the theoretical data of the joint of the adjacent section respectively. S2.

4. Compare the first difference and the second difference to obtain the actual mating allowance, and trim the mating allowance at the joint of the overhanging section and the adjacent section according to the actual mating allowance.

5. The installation method of the outward-projecting segmented type according to claim 4, characterized in that, In step S2.2, the distance between two adjacent measurement points is S, satisfying: S ≤ 500mm.

6. The installation method of the outward floating segmented type according to any one of claims 1 to 3, characterized in that, In step S3, a total of three groups of lifting lugs are set. The first group of lifting lugs and the second group of lifting lugs are spaced apart in the bow-stern direction, and the first group of lifting lugs and the second group of lifting lugs are axially symmetrically arranged with respect to the center of gravity of the overhanging section. The third group of lifting lugs is spaced apart from the first group of lifting lugs and the second group of lifting lugs in the left-right direction.

7. The installation method of the outwardly floating segmented type according to any one of claims 1-3, characterized in that, In step S1, when building the overhanging section, install quick pull codes at the joint on the deck of the overhanging section.

8. The installation method of the externally floating segmented type according to any one of claims 1-3, characterized in that, In step S1, when building the overhanging section, install support seats on the bow and stern sides of the overhanging section respectively. The bottom plate of the support seat is parallel to the hull baseline.

9. The installation method of the externally floating segmented type according to claim 8, characterized in that, In step S4, when hoisting the overhanging section, install support stools on the ground in advance. The top of the support stool is provided with a spiral head, and the support seat is located on the spiral head.

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