CN-119389389-B - Construction method of long axis system of thin-plate ship

CN119389389BCN 119389389 BCN119389389 BCN 119389389BCN-119389389-B

Abstract

The invention discloses a construction method of a long axis system of a thin-plate ship, belongs to the technical field of ship shafting construction, and solves the technical problem of long construction period of the existing ship shafting. The method can start shafting construction after the shafting region of the main hull is folded and formed, and perform subsequent folding, superstructure carrying, main hull cabin density testing, turbine professional base gasket welding and cabin coating of the main hull according to working procedure requirements while shafting construction is performed, and the shafting construction is finished after the first superstructure carrying is completed. Under the condition of guaranteeing the shafting quality, the construction period of the ship berth can be greatly shortened, and a high-quality condition is created for the advanced construction of the subsequent process.

Inventors

Wei Pengheng
ZHANG XIAOLI
YUAN XIAOYE
DING XUEMIN

Assignees

中船桂江造船有限公司

Dates

Publication Date: 20260508
Application Date: 20241107

Claims (8)

1. A construction method of a long axis system of a thin-plate ship is characterized in that shafting construction can be started after a shafting area of a main ship body is folded and formed, the subsequent folding, upper-layer building carrying, main ship body cabin trial compaction, turbine professional base gasket welding and cabin coating of the main ship body are carried out according to working procedure requirements while shafting construction is carried out, and shafting construction is finished after the carrying of a first-layer upper-layer building is completed; performing shafting installation and welding work while the main hull is folded after the cutting-in time of primary shafting stay wire construction reaches shafting construction conditions; and (3) at the cutting-in time of the second shaft system stay wire construction, the main hull is mainly assembled, welded, and subjected to initiating explosive device and tightness, and the shaft system stern shaft frame part is adjusted and welded while the first-layer superstructure is hoisted.
2. The method for constructing the long axis system of the thin-plate ship according to claim 1, wherein after the cutting-in time of the first shafting stay wire construction reaches the shafting construction condition, shafting installation and welding work are carried out while the main ship body is folded, and the method comprises the following steps: adjusting a ship shafting baseline according to the measurement data of the ship state in the earlier stage; constructing a base part, and installing and positioning a main base, a small base, a gear box base, an intermediate bearing seat and a brake device base; constructing a stern shaft frame part, and installing and positioning a stern shaft frame and a stern shaft tube; the method comprises the steps of welding a main machine base, a small base, a gear box base, a middle bearing seat and a brake device base, and welding the peripheral structure of a stern shaft tube of a stern shaft frame, including the welding of an embedded outer plate and a thick plate.
3. The method for constructing a long axis system of a thin-plate ship according to claim 1, wherein the main hull is mainly assembled, welded, fireed and sealed at the time of the second axis system stay construction, and the first superstructure is hoisted while the shafting stern shaft frame part is adjusted and welded, comprising the following steps: The method comprises the steps of full-ship simulation ballasting, hull state measurement, shafting head-tail datum point review, baseline and axis fine adjustment, secondary wire drawing and re-measurement of stern shaft bracket and stern shaft tube installation data, review of whether accuracy requirements are met and timely adjustment; The bracket arm of the stern shaft is welded with the peripheral hull structure and the embedded outer plate and thick plate reinforcement positioning, and then welding is carried out according to the welding sequence; Welding a stern tube; welding and checking a stern shaft tube and a stern shaft frame; and after the welding of the first-layer superstructure is finished, the shafting data are rechecked to meet the precision requirement, and then the turbine specialized construction is carried out.
4. A method of thin-plate ship long-axis system construction according to claim 3, wherein the welding sequence requires: Before formal welding, the welder needs to carry out reinforcement positioning welding in and out of the cabin; The welding procedure is that a hull structure connected with a stern shaft bracket arm and an embedded outer plate and thick plate are symmetrically welded, and then carbon planing back chipping grinding is carried out on the stern shaft bracket arm and a welding seam outside a back side cabin of the embedded outer plate and thick plate, and welding is carried out; when welding in the cabin, firstly welding a butt joint of the structure, then welding a bracket arm and a vertical fillet weld of the structure, and finally welding a flat fillet weld, wherein the welding part and the two sides of the bracket arm of the stern shaft are preheated within a range of 100mm by adopting a cutting torch before welding, and the preheating temperature is 120-200 ℃; During welding, 1 welder performs welding symmetrically on the bracket arm of the stern shaft; when welding the embedded plate with the fillet weld of the bracket arm of the stern shaft, carbon dioxide gas shielded welding is adopted, and a cutting torch is adopted to preheat the welding part and the two sides of the welding part within the range of 100mm before welding, wherein the preheating temperature is 120-200 ℃.
5. A method of constructing a long axis system for a thin-plate ship according to claim 3, wherein the welding of the stern tube comprises: welding the head end seat board and the tail end seat board of the stern tube with the transverse cabin wall board and the solid rib plate reinforcing ring; the head and tail ends of the stern shaft tube are respectively constructed by 2 welders simultaneously; The welding of the stern tube and the hull structure is mostly circumferential welding seams, and in order to reduce welding deformation, an intermittent welding method is adopted; Before welding the stern tube, the welding sequence of the stern tube can be adjusted according to the deviation direction of the total welded data of the three stern shaft frames on the same axis.
6. The method for constructing the long axis system of the thin-plate ship according to claim 3, wherein the step of welding and inspecting the stern shaft tube and the stern shaft frame comprises the steps of carrying out initiating explosive stress relief on a weld joint of the stern shaft frame after the welding of the stern shaft tube and the stern shaft frame is finished, dismantling a support for reinforcement after the weld joint is cooled, and carrying out batch grinding of code pins.
7. The construction method of the long axis system of the thin-plate naval vessel according to claim 1, wherein the E5015 welding rod used in the welding process is dried for 1-2 hours at 300-350 ℃ before being used and stored in a welding rod heat preservation cylinder, and the heat preservation cylinder is electrified for heat preservation in the welding process, and the welding rod is taken along with use.
8. The method for constructing the long-axis system of the thin-plate ship according to claim 3, wherein the method further comprises the following steps of arranging monitoring data of the whole shafting construction process into a book after professional construction of the transfer turbine, wherein the monitoring data comprise periodic change of a ship body state, comparison of measurement data before and after welding of a shafting base part and a stern shaft frame part, and ship body finishing data, and the data are used for analysis and summarization and serve as guiding basis of a subsequent ship.

Description

Construction method of long axis system of thin-plate ship Technical Field The invention relates to the technical field of ship shafting construction, in particular to a thin plate ship long shaft system construction method. Background The propulsion system of the current naval vessel basically adopts long-axis system arrangement, the long-axis system (especially an ultra-long shafting) is installed to penetrate through the whole construction stage of the naval vessel, the construction efficiency of the long-axis system is directly related to the length of the construction period of the naval vessel, and the propulsion system plays an extremely important role in whether a naval vessel receiving shipyard can finish the construction as expected. As shown in fig. 1, the existing ship shafting construction is completed by welding the main ship and the superstructure and correcting the firer, and the construction can be performed after the main ship is subjected to trial-and-precision finishing and the whole ship is subjected to simulation ballast in place, so that the ship construction period is long, the efficiency is low, the production cost of a shipyard is high, and the production benefit is poor. Disclosure of Invention The invention aims to solve the technical problems in the prior art and aims to provide a thin-plate ship long-axis system construction method capable of shortening the ship construction period. In order to achieve the above object, the present invention provides a construction method for a long axis system of a thin-plate ship, which is capable of starting shafting construction after the shafting region of the main ship body is folded and formed, performing subsequent folding, upper-layer building carrying, main ship cabin density testing, turbine professional base gasket welding and cabin coating of the main ship body according to the working procedure requirements while shafting construction, and ending shafting construction after the first-layer upper-layer building carrying is completed. The construction process includes the steps of main hull shafting area folding formation, slipway pier position adjustment according to shafting construction stage, pier wood tightening and compaction, shafting area hull measurement and adjustment, primary stay wire measurement, shafting baseline determination, shafting tail ground sample line scribing, shafting head and tail reference point scribing confirmation, shafting head and tail bottom ground vertical height monitoring standard posts, main foundation panel and small base, gear box seat panel, middle bearing seat and brake device seat installation, base installation, pre-installation work of a stern shaft frame and a stern shaft tube, pre-installation work of thick plates of a peripheral structure and an embedded outer plate, base pre-welding measurement and groove verification, base welding, post-welding of the peripheral structure of the stern shaft tube, welding of an embedded outer plate thick plate, base part, post-welding measurement verification, turbine fixing gasket installation welding, cabin paint, whole-ship simulation ballasting, hull state measurement confirmation, head and tail reference point measurement, secondary stay wire measurement, shafting adjustment, measurement and re-inspection of the shafting head and tail shaft frame and stern shaft tube installation, adjustment, support and stern shaft tube installation and adjustment, support arm and stern shaft tube installation, support and groove verification, reinforcement, stern shaft tube and post-welding, special stress relief and post-inspection, and special repair and reinforcement. Further, the conditions of the shafting construction include: in the base part, the main hull of the shafting area is folded and formed, and the main assembly and welding are completed; The ship body is formed at a tail shaft frame part, mainly assembled, welded and fire-cured, a main ship body water filling cabin tightness test is finished, a shafting arrangement area main tightness test is finished, a first-layer superstructure is carried and finished, ballasting is carried out according to a main equipment ballast arrangement diagram, main equipment enters the cabin or is replaced by ballast with similar weight, and ship body state data measurement and confirmation records are carried out before shafting construction. Further, after the cutting-in time of the first shafting stay wire construction reaches shafting construction conditions, shafting installation and welding work are carried out while the main hull is folded, and the shafting installation and welding work comprises the following work: adjusting a ship shafting baseline according to the measurement data of the ship state in the earlier stage; constructing a base part, and installing and positioning a main base, a small base, a gear box base, an intermediate bearing seat and a brake device base; constructing a stern shaft frame par