Fabricated hull structure construction process

Abstract

The invention relates to an assembly type hull structure construction technology. The technology comprises the following steps that S1, hull structure connecting pieces are machined; s2, manufacturing a main body structure of each module; s3, the main module connecting pieces are assembled and welded completely; s4, auxiliary module connecting pieces are matched and welded; s5, carrying out disassembly and assembly test on each module; according to the fabricated hull structure construction process, after the structural form of the connecting pieces is analyzed, the paired connecting pieces are separated, machining operation is conducted in advance, the connecting pieces are paired and machined in a machining workshop, the size precision is easy to control, the machining difficulty is low, and during machining of the connecting pieces, module main body structures can be synchronously manufactured; only assembling and welding operation is needed subsequently, procedures are migrated, and the construction period is shortened.

Description

Technical Field

[0001] The present invention relates to the technical field of shipbuilding, and in particular to a construction process of an assembled hull structure. Background Art

[0002] Soil erosion in the upper reaches of major rivers has not been fundamentally solved, resulting in continuous siltation in downstream rivers and lakes. Large dredgers can be used for dredging operations in large rivers such as the Yangtze River and the Yellow River, but small rivers and lakes are generally operated with small dredgers due to restrictions such as navigation conditions. Compared with dredging operations that easily involve hundreds of millions of cubic meters, the construction period is relatively long. In this context, assembled dredgers have been developed to reduce dredging costs.

[0003] The assembled dredger is divided into different modules according to its function. Each module is connected by a detachable structure to meet the requirements of water or land transportation. The assembled connector consists of a bottom hook and a top connection flange. During the installation process, the bottom hook is first connected in place, and then the top flange bolts are tightened to achieve the purpose of assembling each functional module completely.

[0004] The total weight of a prefabricated dredger project is generally around 500 tons. During the manufacturing process of the hull structure of a prefabricated dredger, the welding deformation is large. Generally, the solution of welding first and then processing the connectors is adopted, or the solution of processing the connectors on one module and processing the other module in pair with it is adopted. Although the matching processing solution of the prefabricated hull structure can ensure the processing accuracy, both of the above solutions require on-site matching and processing. If large machine tools are used, the cost will increase, and small processing equipment will be inefficient and increase the construction period. In addition, due to the limitation of the structural form, the on-site construction space is small, and the cross-construction of multiple types of work is difficult, resulting in a long construction period and unable to meet the project construction period requirements.

[0005] Therefore, the present invention proposes a fabricated hull structure construction process to solve the above problems. Summary of the invention

[0006] The technical problem to be solved by the present invention is to provide a fabricated hull structure construction process, which separates the mechanical processing of connectors from the production of module structures, reduces the construction difficulty, and shortens the construction period.

[0007] In order to solve the above technical problems, the technical solution of the present invention is: a fabricated hull structure construction process, the innovation of which is: comprising the following steps: S1. Machining of hull structure connectors; S1-1. Separation of connectors: Establish a model, analyze the structural form of connectors, separate and cut connectors, and perform matching and numbering; S1-2, Connector pairing processing: The separated connectors are paired in the processing workshop. After the processing is completed, the connectors are checked for matching and grouped and numbered; S2, making the main structure of each module; S2-1, panel production: make a horizontal frame, assemble according to the panel drawings, and control the accuracy of the panel dimensions. Add anti-deformation when assembling the panels, and weld them step by step from the inside to the outside to ensure the flatness and diagonal dimensions of the panels; S2-2, plate unit production: mark the plate and weld the stiffeners according to the marks; S2-3, module overall forming: the module bottom plate is mounted on the frame and fixed to the frame, the template side plate is mounted on the frame, auxiliary support is added, the internal components are installed, the module top plate is welded, and the module is overall formed; S3. The main module connectors are fully welded; S3-1. Check the connection parts of the main module: fix the main module on the tire frame, mark the positioning lines and inspection lines of the connection parts corresponding to the connection parts on the main module according to the reference line, and weld the connection parts corresponding to the connection parts; S3-2, welding and installation of reinforcement parts of the main module connector; S4, matching welding of auxiliary module connectors; S4-1. Marking the positioning line of the auxiliary module connection part: Mark the positioning line of the connection part corresponding to the connection piece on the auxiliary module according to the reference line, fix the main module on the tire frame, match the auxiliary module and the main module according to the reference line, match the watertight hook at the bottom of the auxiliary module with the fixed pin at the bottom of the main module, and after spot welding positioning, match the connection flange at the top of the auxiliary module with the connection flange at the top of the main module, and spot weld positioning; S4-2, the auxiliary module is separated from the main module; S4-3, welding the connector on the auxiliary module; S5. Disassembly and assembly test of each module; S5-1. After the main module and the auxiliary module are connected in place, use the lifting equipment to safely lift each module and keep the module at a safe height; S5-2, after removing the fasteners of the upper connection flanges of the main module and the auxiliary module, the main module is kept in position and the auxiliary module is lowered to separate the main module from the auxiliary module, and the operation is repeated; S5-3. Repeat operations S5-1 and S5-2 to check the disassembly and assembly status of other auxiliary modules.

[0008] Furthermore, during the assembly operation in step S2-1, the outer dimensions of the panels are controlled within ±4 mm.

[0009] Furthermore, after the connecting parts of the main module are assembled and welded in step S3-1, the connection accuracy of the main module is controlled within ±2mm.

[0010] Furthermore, in step S4-3, the welding of the connectors on the auxiliary module is performed by symmetrical welding.

[0011] The advantages of the present invention are: After analyzing the structural form of the connecting parts, the prefabricated hull structure construction process of the present invention separates the paired connecting parts and performs mechanical processing in advance. The connecting parts are paired and processed in a processing workshop, and the dimensional accuracy is easy to control and the processing difficulty is low. When the connecting parts are mechanically processed, the module main structure can be manufactured simultaneously, and only assembly and welding operations are required later. The process is migrated, which shortens the construction period. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0013] Figure 1 It is a structural schematic diagram of the main module of the present invention.

[0014] Figure 2 It is a cross-sectional view at point A of the present invention.

[0015] Figure 3 It is a structural schematic diagram of the auxiliary module of the present invention.

[0016] Figure 4 It is a cross-sectional view at point B of the present invention. DETAILED DESCRIPTION

[0017] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the specific implementation mode, structure, characteristics and effects of the present invention are described in detail below in combination with the accompanying drawings and preferred embodiments.

[0018] Example like Figure 1-4 As shown, the assembled hull structure is composed of a main pontoon, a side pontoon and a trolley pontoon. The main pontoon constitutes a main module 1, and the side pontoon and the trolley pontoon together constitute an auxiliary module 2. A fixed pin shaft 12 is arranged at the lower part of the main module 1, and the fixed pin shaft 12 is made integrally with the structure of the main module 1 to ensure watertightness. A first connecting flange 11 is arranged at the upper part of the main module 1, and a watertight hook 22 is arranged at the lower part of the auxiliary module 2. The top of the watertight hook 22 has a hook groove for hooking out the fixed pin shaft 12. A second connecting flange 21 is arranged at the upper part of the auxiliary module 2. The first connecting flange 11 and the second connecting flange 21, the fixed pin shaft 12 and the watertight hook 22 together constitute a connecting piece for connecting the main module 1 and the auxiliary module 2. When connected, the watertight hook 22 hooks the fixed pin shaft 12 from below, and the second connecting flange 21 and the first connecting flange 11 are matched and connected and fixed with practical fasteners.

[0019] This embodiment provides the above-mentioned fabricated hull structure construction process, including the following steps: S1. Machining of hull structure connectors; S1-1. Separation of connectors: Establish a model, analyze the structural form of connectors, separate and cut connectors, and perform matching and numbering; S1-2, Connector pairing processing: The separated connectors are paired in the processing workshop. After the processing is completed, the connectors are checked for matching and grouped and numbered; S2, making the main structure of each module; S2-1, panel production: make a horizontal frame, assemble according to the panel drawings, control the panel dimensions within ±4mm during assembly, add anti-deformation when assembling, and weld gradually from the inside to the outside to ensure the flatness and diagonal dimensions of the panels; S2-2, plate unit production: mark the plate and weld the stiffeners according to the marks; S2-3, module overall forming: the module bottom plate is mounted on the frame and fixed to the frame, the template side plate is mounted on the frame, auxiliary support is added, the internal components are installed, the module top plate is welded, and the module is overall formed; S3. The main module connectors are fully welded; S3-1. Check the connection parts of the main module: fix the main module on the tire frame, mark the positioning lines and inspection lines of the connection parts corresponding to the connection parts on the main module according to the reference line, install and weld the connection parts corresponding to the connection parts. After the connection parts of the main module are installed and welded, the connection part accuracy of the main module is controlled within ±2mm; S3-2, welding and installation of reinforcement parts of the main module connector; S4, matching welding of auxiliary module connectors; S4-1. Marking the positioning line of the connection part of the auxiliary module: Mark the positioning line of the connection part corresponding to the connection piece on the auxiliary module according to the reference line, fix the main module on the tire frame, match the auxiliary module and the main module according to the reference line, match the watertight hook at the bottom of the auxiliary module with the fixed pin at the bottom of the main module, and after spot welding positioning, match the second connection flange at the top of the auxiliary module with the first connection flange at the top of the main module, and spot weld positioning; S4-2, the auxiliary module is separated from the main module; S4-3, welding the connectors on the auxiliary module, using symmetrical welding to achieve uniform deformation and meet assembly accuracy requirements; S5. Disassembly and assembly test of each module; S5-1. After the main module and the auxiliary module are connected in place, use the lifting equipment to safely lift each module and keep the module at a safe height; S5-2, after removing the fasteners of the upper connection flanges of the main module and the auxiliary module, the main module is kept in position and the auxiliary module is lowered to separate the main module from the auxiliary module, and the operation is repeated; S5-3. Repeat operations S5-1 and S5-2 to check the disassembly and assembly status of other auxiliary modules.

[0020] After analyzing the structural form of the connectors, the prefabricated hull structure construction process separates the paired connectors and performs machining operations in advance. The connectors are paired and processed in the processing workshop. The dimensional accuracy is easy to control and the processing difficulty is low. When the connectors are machined, the main structure of the module can be manufactured simultaneously. Only assembly and welding operations are required later. The process is migrated, which shortens the construction period.

[0021] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A process for building an assembled hull structure, characterized in that: The following steps are involved: S1. Machining of hull structure connectors; S1-1. Separation of connectors: Establish a model, analyze the structural form of connectors, separate and cut connectors, and perform matching and numbering; S1-2, Connector pairing processing: The separated connectors are paired in the processing workshop. After the processing is completed, the connectors are checked for matching and grouped and numbered; S2, making the main structure of each module; S2-1, panel production: make a horizontal frame, assemble according to the panel drawings, and control the accuracy of the panel dimensions. Add anti-deformation when assembling the panels, and weld them step by step from the inside to the outside to ensure the flatness and diagonal dimensions of the panels; S2-2, plate unit production: mark the plate and weld the stiffeners according to the marks; S2-3, module overall forming: the module bottom plate is mounted on the frame and fixed to the frame, the template side plate is mounted on the frame, auxiliary support is added, the internal components are installed, the module top plate is welded, and the module is overall formed; S3. The main module connectors are fully welded; S3-1. Check the connection parts of the main module: fix the main module on the tire frame, mark the positioning lines and inspection lines of the connection parts corresponding to the connection parts on the main module according to the reference line, and weld the connection parts corresponding to the connection parts; S3-2, welding and installation of reinforcement parts of the main module connector; S4, matching welding of auxiliary module connectors; S4-1. Marking the positioning line of the auxiliary module connection part: Mark the positioning line of the connection part corresponding to the connection piece on the auxiliary module according to the reference line, fix the main module on the tire frame, match the auxiliary module and the main module according to the reference line, match the watertight hook at the bottom of the auxiliary module with the fixed pin at the bottom of the main module, and after spot welding positioning, match the connection flange at the top of the auxiliary module with the connection flange at the top of the main module, and spot weld positioning; S4-2, the auxiliary module is separated from the main module; S4-3, welding the connector on the auxiliary module; S5. Disassembly and assembly test of each module; S5-1. After the main module and the auxiliary module are connected in place, use the lifting equipment to safely lift each module and keep the module at a safe height; S5-2, after removing the fasteners of the upper connection flanges of the main module and the auxiliary module, the main module is kept in position and the auxiliary module is lowered to separate the main module from the auxiliary module, and the operation is repeated; S5-3. Repeat operations S5-1 and S5-2 to check the disassembly and assembly status of other auxiliary modules.

2. The process for building a prefabricated hull structure according to claim 1, characterized in that: During the assembly operation in step S2-1, the outer dimensions of the panels are controlled within ±4 mm.

3. The process for building a prefabricated hull structure according to claim 1, characterized in that: After the connecting parts of the main module are assembled and welded in step S3-1, the connection accuracy of the main module is controlled within ±2mm.

4. The process for building a prefabricated hull structure according to claim 1, characterized in that: In step S4-3, the welding of the connecting parts on the auxiliary module is performed symmetrically.

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