Method for hoisting and installing shafting of large container ship

Abstract

The invention relates to the technical field of shipbuilding, in particular to a large container ship shafting hoisting and mounting method, a hoisting tool comprises a single-rail I-shaped beam arranged in the center of a ship body above a middle shaft and used for shaft movement, a double-rail I-shaped beam arranged below the middle shaft, and a double-rail trolley arranged on the double-rail I-shaped beam and used for shaft movement; three hand-pulled monorail trolleys are hung below the monorail I-shaped beam, and a hanging beam is arranged below each hand-pulled monorail trolley and used for allowing the 1 # intermediate shaft to penetrate into the shaft generator during follow-up operation; the invention relates to a hand-pulled monorail trolley lifting beam. A pneumatic hoist for lifting is arranged at a lifting point for moving of each shaft. The pneumatic hoist, the lifting point, the lifting belt and the single-rail pulley with the lifting beam are arranged in the shaft lifting process, shaft lifting convenience and fewer workers are achieved, in-situ up-down and left-right movement of any shaft can be operated by only two workers, no large physical output is generated, only five professional shaft lifting group matching workers are needed in the whole operation process, the labor intensity of workers is lowered, and the working efficiency is improved. And the shafting lifting operation of the large container ship with few persons is realized.

Description

Technical Field

[0001] The present application relates to the field of shipbuilding technology, and in particular to a method for hoisting and installing a shaft system of a large container ship. Background Art

[0002] Large container ships are usually designed with multiple shafts, including 1 propeller shaft and 2 to 3 intermediate shafts; the latest delivered container ships are also equipped with shaft-mounted permanent magnet rotor shaft-driven generators (hereinafter referred to as shaft generators). The rotor of the shaft generator is permanent magnet, which is encircled by an intermediate shaft (rotor shaft) closest to the output end of the main engine. When the main engine crankshaft rotates, the propeller is driven to rotate through the transmission shaft to drive the ship to sail and drive the generator to output electricity for the ship. The shaft system includes the propeller shaft, intermediate shaft, shaft generator, main engine, intermediate bearing and various accessories. The shaft generator is installed on the intermediate shaft connected to the rear of the main engine flywheel as part of the shaft system. The main engine is connected to the transmission shaft for driving the propeller through the intermediate shaft. The intermediate shaft is connected to the permanent magnet generator rotor flange through a flange protruding from the middle of the intermediate shaft. The stator of the permanent magnet generator is fixed to the casing of the permanent magnet generator, and the casing is fixed to the hull through the base. How to formulate a reasonable shaft system lifting plan based on the shaft system layout and hull structure characteristics, including overall considerations in the initial design stage, optimization in the detailed design stage, and comprehensive consideration of the shortest docking period, so as to achieve flexibility in shaft system layout, simplification of lifting operations, and minimization of overall costs is a goal that shipyard technicians need to consider from the perspective of lean production. Summary of the invention

[0003] In order to shorten the operation time of the shaft system of large container ships under the traditional mode, the present application provides a method for lifting and installing the shaft system of large container ships. During the shipbuilding process, the installation of the shaft system generally needs to be moved into the shaft room through the opening position where the main engine is located before the main engine is installed, and the cabin top section is installed after the main engine is installed. In the traditional mode, the shaft system is first formally illuminated, the installation of the shaft system is completed before the main engine is installed, and the cabin top section is installed after the main engine is installed. The time from temporary illumination of the shaft system to the installation of the main engine is too long, which affects the ship construction cycle. The purpose of the present invention is to shorten the operation time of the shaft system of large container ships under the traditional mode, and adopt a method for lifting and installing the shaft system of a large container ship, which completes the pre-loading and suspension of multiple shafts of the large and long shaft system of the large container ship in the shaft room before the main engine is installed, and adopts the following technical scheme: A method for lifting and installing a shaft system of a large container ship comprises a lifting tool, wherein the lifting tool comprises a monorail I-beam for shaft movement arranged at the central position of a hull above an intermediate shaft, a double-track I-beam arranged below the intermediate shaft, and a double-track trolley for shaft movement arranged on the double-track I-beam; three hand-pulled monorail trolleys are suspended below the monorail I-beam, and a lifting beam is installed below each hand-pulled monorail trolley for passing a shaft belt generator through a No. 1 intermediate shaft in subsequent operations; a pneumatic hoist for lifting is arranged at the hand-pulled monorail trolley lifting beam and the lifting points for movement of each shaft; two pneumatic hoists are arranged at each lifting point on the shaft through an annular lifting belt, and a single shaft can be lifted by at least four pneumatic hoists at the same time.

[0004] Preferably, the lifting capacity requirement of the pneumatic hoist is 1 / 4 of the axle weight. By adopting the above technical solution, the external dimensions of the pneumatic hoist can be reduced accordingly to meet the narrow space requirements of the ship.

[0005] Preferably, a backup lifting point is provided in addition to the lifting point of the pneumatic hoist, and a special lifting belt is provided. The length of the lifting belt is calculated according to the height of the shaft suspension. When a single shaft is suspended for a long time, there are 8 lifting points that bear the weight of the shaft at the same time, and the load-bearing capacity of a single lifting point is 1 / 8 of the weight of the shaft. By adopting the above technical solution, considering the risk of slip chain when the shaft is used as a heavy object and suspended for a long time by a pneumatic hoist, a backup lifting point is provided in addition to the lifting point of the pneumatic hoist, thereby improving safety.

[0006] Preferably, the propeller shaft and 1# intermediate shaft are arranged in the center, and the 2# intermediate shaft and 3# intermediate shaft are arranged on both sides. The lower end of the propeller shaft and 1# intermediate shaft flange can be lifted by a pneumatic hoist to be 500mm above the axis without affecting the illumination of the axis. After the propeller shaft and each intermediate shaft are temporarily suspended in the shaft chamber, the main engine can be hoisted and loaded.

[0007] Preferably, the propeller shaft and each intermediate shaft are temporarily suspended at the suspension points in the shaft chamber and the force conditions thereof are calculated to determine the form of the structural lifting lugs and to add corresponding reinforcing strips.

[0008] Preferably, the form of the structural lifting lugs and the arrangement of the corresponding additional reinforcement strips are included in the management of the hull structure production design drawings before the start of section construction. If there is interference with other hull components or pipelines or circuits, coordination must be carried out with the relevant professional responsible persons before the production design drawings are issued to ensure that the lifting lugs are permanently retained as part of the hull and do not need to be cut off after the operation is completed.

[0009] The following steps are involved: Step 1: Use two ring-shaped high-strength slings of suitable lifting weight to tie them equally on both sides of the propeller shaft center of gravity by penetration and binding, and hang them on the hook of the dock gantry crane and lift them into the engine room; Step 2: Set a support platform and sleepers on the inner bottom of the main engine platform; pass two hand-pulled monorail trolleys with hanging beams toward one end of the shaft room, and wrap the high-strength annular sling around the propeller shaft in the form of a bag. While operating the dock crane to continue to descend, operate the pneumatic hoist (2 at each location) on the hand-pulled monorail trolley to move upward so that the hand-pulled monorail trolley, hanging beam, pneumatic hoist, and sling assembly begin to be stressed; until the weight of the propeller shaft is completely borne by the hand-pulled monorail trolley and the support platform; then the hook continues to descend to release the sling that binds the shaft, and then the hook moves forward to the front flange, and the sling bag is hung around the propeller shaft to bear the force; then the pneumatic hoist and the hook move upward at the same time to lift the propeller shaft for a short distance, and then remove the sleepers so that the propeller shaft flange can pass through the support platform, and operate the monorail trolley and the dock crane to move backward at the same time until the lifting point at the front flange cannot move backward any further; Step 3: When the dock crane cannot move backward any further, the high-strength annular sling is wrapped around the propeller shaft in the form of a sling, and the pneumatic hoists (two in total) are operated to move upward, so that the third hand-pulled monorail trolley located at the front of the monorail I-beam bears the weight of the propeller shaft through the sling beam, and then the hook of the dock crane continues to descend and leave; Step 4: Move the lifting point consisting of the middle set of trolleys and the lifting beam, pneumatic hoists (2 in total) and high-strength annular slings forward to the position close to the center of gravity of the propeller shaft. The three sets of hand-pulled monorail trolleys share the weight of the propeller shaft. Then operate the three sets of hand-pulled monorail trolleys to move backward simultaneously to the top of the two double-track trolleys located on the double-track I-beam. Step 5: Use pneumatic hoists (6 in total) to lower the propeller shaft onto the two double-track trolleys on the double-track I-beam. The propeller shaft is moved backward to the specified position by the double-track trolleys. The remaining intermediate shafts can be moved to the specified positions in the manner described in the above steps. Step 6: Use the lifting point with pneumatic hoists (4 units in total) to lift the 2# and 3# intermediate shafts to the specified height through high-strength annular slings; then use customized high-strength annular slings to hold the 2# and 3# intermediate shafts at the lifting point, and then use pneumatic hoists (4 units in total) to lower the 2# and 3# intermediate shafts to force the slings at the lifting point, so that the slings and pneumatic hoists at the lifting point are roughly evenly stressed, increasing the safety redundancy of the lifting point; the height of the temporary placement of the shaft ensures that the flange is higher than the height of the shaft system, which is convenient for subsequent axis lighting operations; Step 7: By setting the lifting points at the central position and the left and right sides and installing the pneumatic hoist and slings below, the 2# intermediate shaft and the 3# intermediate shaft are moved from the central position to the left and right sides for hanging by pulling the slings in pairs. Then, the weight of the 2# intermediate shaft and the 3# intermediate shaft is roughly evenly borne by the slings and pneumatic hoists in the manner of step 6, so as to increase the safety redundancy of the lifting points. Step 8: After temporarily hanging the 2# and 3# intermediate shafts, move the 1# intermediate shaft to the designated position according to the method of steps 2-5. The weight of the 1# intermediate shaft is roughly evenly supported by the hanging points, the pneumatic hoist on the hand-pulled monorail trolley and the hanging belt, so as to increase the safety redundancy of the hanging points; Step 9: During the formal installation, the propeller shaft can be lifted a short distance upwards with a pneumatic hoist, the force on the lifting point and the high-strength annular sling below can be released, and then the sling can be removed; at this time, the weight of the propeller shaft is completely borne by the lifting point, pneumatic hoists (a total of 4 units) and high-strength annular slings; operate the pneumatic hoists (a total of 4 units) to lower the propeller shaft to the double-track trolley located on the double-track I-beam, and the weight of the propeller shaft is completely borne by the double-track trolley, and then the surface of the propeller shaft is degreased and cleaned; Preferably, the degreasing and cleaning operation can utilize the up and down movement of the pneumatic hoist (a total of 4 units), the forward and backward movement of the double-track trolley, and the operation of the pneumatic hoist to raise one side and lower the other side to realize the rotation of the shaft through the strong annular sling, which is convenient for large-diameter propeller shafts.

[0010] Step 10: Use the double-track trolley on the double-track I-beam to help adjust the height and left-right position of the propeller shaft to facilitate the alignment of the propeller shaft before inserting it into the stern tube bearing; Step 11: Through the compact sliding device arranged on the end face of the stern tube and the shaft moving force anchor point on the bearing platform, one end of the shaft moving traction wire rope sling is fixed to the flange of the propeller shaft, and the other end is connected to the force anchor point through the shaft moving pneumatic hoist after changing direction through the compact pulley device; Step 12: Operate the pneumatic hoist to pull the traction wire rope to move the propeller shaft and complete the operation of inserting the propeller shaft into the shaft tube.

[0011] In summary, the present application includes at least one of the following beneficial technical effects: This application realizes the convenience and less-manpower operation of shaft system lifting through the pneumatic hoist, lifting point, lifting belt, and monorail pulley with lifting beam set in the process of shaft movement and lifting. Only 2 people are needed to operate any shaft up and down and left and right without much physical exertion. During the whole operation, the professional shaft system lifting team only needs 5 people, realizing the less-manpower operation of shaft system lifting of large container ships. ; This application takes overall considerations in the initial design stage, optimization in the detailed design stage, and comprehensive consideration of the shortest docking period into account, thereby achieving lean production goals of less-manned operation of the shaft system lifting of large container ships, flexibility in shaft system layout, simplification of operations, and minimization of overall costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram of temporary suspension of the stern shaft and intermediate shaft; Figure 2 yes Figure 1 Middle CC cross section; Figure 3 yes Figure 1 Middle DD cross-section; Figure 4 yes Figure 1 Middle AA section; Figure 5 yes Figure 1 Middle BB cross section; Figure 6 It is a schematic diagram of the construction lug; Figure 7 It is a schematic diagram of the shaft being hoisted into the engine room opening; Figure 8 It is a schematic diagram of the axle being suspended and transported by a monorail pulley; Fig. 9 It is a schematic diagram of the axle moving backwards by the double-track trolley; Fig.10 It is a schematic diagram of the shaft being suspended by a pneumatic hoist; Fig.11 This is a schematic diagram of the suspension with the intermediate shaft moving left and right; Fig.12 Intermediate shaft suspension diagram Fig.13 Schematic diagram of intermediate shaft suspension; Fig.14 It is a schematic diagram of shaft rotation; Fig.15 It is a schematic diagram of the stern shaft placed on a double-track trolley; Fig.16 It is a schematic diagram of the stern shaft being inserted into the shaft tube; Fig.17 It is a top view of the stern shaft inserted into the shaft tube; Fig.18 It is a flow chart of the installation of shafting in the shipbuilding process in the prior art; Fig.19 It is a flow chart of the installation of the shafting during the shipbuilding process in this application.

[0013] Description of reference numerals: Host: E00; Host: E00; Double track I-beam: H2, H3; Double-track trolley: 12, 13, 14; Hand-pulled monorail trolleys: 15, 16, 17; Hanging beam: 18, 19, 20; Bearing stand: MS4; Lifting direction: A1, A2, A3, A4, A5, A6, A7, A8, A9, A10, A11, A12, A13, A14, A15, A16, A17, A18; Support table: B1; Sleepers: B2, B3; Hooks: 21; D1 / D6: Lifting equipment is arranged on the left and right, including structural lifting lugs and shackles, used for the suspension of the 2# and 3# intermediate shafts and for left and right movement; D3 / D4: Lifting equipment is arranged on the left and right, including structural lifting lugs and shackles, for the suspension of the 2# and 3# intermediate shafts; D2 / D5: The lifting equipment is arranged in the center, including structural lifting lugs and shackles, which are used for hanging and moving up and down the 1# intermediate shaft (rotor shaft) and for moving the 2# and 3# intermediate shafts left and right; D8 / D9: The lifting equipment is arranged in the center, including structural lifting lugs and shackles, which are used for the propeller shaft (tail shaft) to suspend and move up and down; D7 / D10: Centrally arranged lifting equipment, including structural lifting lugs and shackles, for propeller shaft (tail shaft) suspension; 1-11: Pneumatic hoists for lifting (a total of 22 units); 15 / 16 / 17: 1#, 2#, 3# hand-pulled monorail trolleys with hanging beams; S1-S3: slings for moving the axle forward and backward (on a hand-pulled monorail trolley); S4-S5: 1# intermediate shaft suspension and slings for 2# and 3# intermediate shaft left and right movement; S6 / 7, S8 / 9: 2# intermediate shaft, 3# intermediate shaft suspension and slings for left and right movement; S10 / 11, S12 / 13: slings for suspension of 2# intermediate shaft and 3# intermediate shaft; S14-S15: Tail shaft suspension and sling for up and down movement; S16-S17: sling for tail shaft suspension; D11 / D12: Compact pulley device; D13 / D14: axis movement force anchor point; S18 / S19: Axis movement traction wire rope; 21 / 22: Pneumatic hoist for axis movement. DETAILED DESCRIPTION

[0014] The following is combined with Figure 1-19 This application is described in further detail.

[0015] The embodiment of the present application discloses a method for hoisting and installing a shaft system of a large container ship.

[0016] Reference Fig.18During the shipbuilding process, the shaft system is usually installed by moving it into the shaft room through the opening where the main engine is located before the main engine is installed, and the cabin top sections are installed after the main engine is installed. In the traditional mode, the shaft system is first formally illuminated, the shaft system is installed before the main engine is installed, and the cabin top sections are installed after the main engine is installed. The time from temporary illumination of the shaft system to the installation of the main engine is too long, which affects the shipbuilding cycle.

[0017] Reference Fig.19 The purpose of the present invention is to shorten the operation time of the shaft system of a large container ship in the traditional mode, and to adopt a shaft system lifting and installation method in which multiple shafts of the large container ship's long shaft system are pre-loaded and suspended in the shaft room before the main engine is installed.

[0018] Reference Figure 1-Figure 6A method for lifting and installing a shaft system of a large container ship includes a lifting tool, wherein the lifting tool includes a single-track I-beam H1 for shaft movement arranged at the central position of the hull above the intermediate shafts E11, E12, and E13, and double-track I-beams H2 and H3 are arranged below the intermediate shafts E11, E12, and E13, and double-track trolleys 12-14 for shaft movement are arranged on the double-track I-beams H2 and H3; three hand-pulled monorail trolleys 15-14 are suspended under the single-track I-beam H1. 17. The hand-pulled monorail trolley 15-17 is provided with a lifting beam 18-20 below each, which is used for the 1# intermediate shaft E11 to pass through the shaft-belt generator E10 in subsequent operations; the hand-pulled monorail trolley 15-17 lifting beam 18-20 and each shaft are provided with a pneumatic hoist 1-11 for lifting at the lifting point for movement; each lifting point on the shaft is provided with two pneumatic hoists 1-11 through a ring sling, and a single shaft can be lifted by at least four pneumatic hoists 1-11 at the same time. The lifting capacity requirement of the pneumatic hoist 1-11 is 1 / 4 of the axle weight. In addition to the pneumatic hoist 1-11 lifting point, backup lifting points D3 / D4, D7 / D10 are set up in other places, and special lifting belts S10 / 11, S12 / 13, S14, S15, S18, and S19 are also set up. The length of the lifting belt is calculated according to the height of the shaft suspension. When a single shaft is suspended for a long time, there are 8 lifting points that bear the weight of the shaft at the same time, and the load-bearing capacity of a single lifting point is 1 / 8 of the shaft weight. The propeller shaft E14 and the 1# intermediate shaft E11 are arranged in the center, and the 2# intermediate shaft E12 and the 3# intermediate shaft E13 are arranged on both sides. The lower end of the flange of the propeller shaft E14 and the 1# intermediate shaft E11 can be lifted by the pneumatic hoist 1-11 to be 500mm higher than the axis without affecting the illumination of the axis; after the propeller shaft E14 and each intermediate shaft E11, E12, and E13 are temporarily suspended in the shaft room, the main engine E00 can be lifted and loaded. The propeller shaft E14 and each intermediate shaft E11, E12, E13 are temporarily suspended in the shaft room. The force conditions are calculated to determine the form of the structural lifting lugs and the corresponding reinforcement strips. The form of the structural lifting lugs and the arrangement of the corresponding reinforcement strips are included in the hull structure production design drawing management before the start of the block construction. If there is interference with other hull parts or pipelines and circuits, it is necessary to coordinate with the relevant professional responsible persons before the production design drawings are issued to ensure that the lifting lugs are permanently retained as part of the hull and do not need to be cut off after the operation is completed.

[0019] A method for hoisting and installing a shaft system of a large container ship comprises the following steps: Step 1: Reference Figure 7 , use two ring-shaped high-strength slings S18 & S19 of suitable lifting weight to be tied equidistantly on both sides of the center of gravity of the propeller shaft E14 by penetration and binding, and hang them on the hook 21 of the dock gantry crane to be hoisted into the A1 engine room; Step 2: Reference Figure 7, set up a support platform B1 and sleepers B2&B3 on the inner bottom of the main machine platform E00; pass two hand-pulled monorail trolleys 16&17 with hanging beams 19&20 toward one end of the shaft room, and wrap the high-strength annular sling S2&S3 around the propeller shaft E14 in the form of a sling, operate the dock crane to continue to descend A1, and at the same time, operate the pneumatic hoists 5&6 on the hand-pulled monorail trolleys 16&17 to move 2 units upward A2 so that the hand-pulled monorail trolleys 16&17, hanging beams 19&20, pneumatic hoists 5&6, and slings S2&S3 combination begin to bear force; until the weight of the propeller shaft E14 is completely lifted by the hand-pulled monorail trolleys 16&17 and the support platform B1 bear; then the hook 21 continues to descend to release the slings S18&S19 that bind the shaft, and then the hook 21 moves forward A3 to near the front flange, and the slings S18&S19 are hooked and wrapped around the propeller shaft E14 to bear the force; then the pneumatic hoist 5&6 and the hook 21 move upward at the same time to lift the propeller shaft E14 a short distance A2, and then the sleepers B2&B3 are removed A4, so that the flange of the propeller shaft E14 can pass through the support platform B1, and the monorail trolleys 16, 17 and the dock crane are operated to move backwards at the same time A5, until the lifting point at the front flange can no longer move backwards; Step 3: Reference Figure 8 When the dock crane cannot move backward any further, the high-strength annular sling S1 is wrapped around the propeller shaft E14 in the form of a sling, and the pneumatic hoist 1 (a total of 2 units) is operated to move A6 upward, so that the third hand-pulled monorail trolley 15 located at the front of the monorail I-beam H1 bears the weight of the propeller shaft E14 through the hanging beam 18, and then the hook of the dock crane continues to descend and leaves A8; Step 4: Reference Figure 8 , move the lifting point consisting of the middle group of trolleys 16 and the hanging beam 19, the pneumatic hoists 5 in total of 2 units and the high-strength annular sling S2 forward A7 to the position close to the center of gravity of the propeller shaft E14, and then the three groups of hand-pulled monorail trolleys 15, 16, 17 share the weight of the propeller shaft E14 together, and then operate the three groups of hand-pulled monorail trolleys 15, 16, 17 to move backward A9 at the same time to the top of the two double-track trolleys 13 & 14 located on the double-track I-beam H3; Step 5: Reference Fig. 9 , lower the propeller shaft E14 by pneumatic hoists 1, 5, 6 (a total of 6 units) A10 to the two double-track trolleys 13 & 14 on the double-track I-beam H3, and move the propeller shaft E14 backward A11 to the designated position through the double-track trolleys 13 & 14. The remaining intermediate shafts E11, E12, and E13 can be moved to the designated positions in the manner described in the above steps; Step 6: Reference Fig.10, using pneumatic hoists 10&11, a total of 4 units, the 2# intermediate shaft E12 and 3# intermediate shaft E13 are lifted to A12 at the specified height slightly higher than the S16&S17 slings by using the high-strength annular slings S14&S15 at the lifting points D8&D9; then the 2# intermediate shaft E12 and 3# intermediate shaft E13 are lifted to A13 at the lifting points D7 and D10 by using the high-strength annular slings S16&S17 with customized lengths, and then the pneumatic hoists are used to lift the 2# intermediate shaft E12 and 3# intermediate shaft E13 to A13. Hoists 10 & 11, 4 in total, lower the 2# intermediate shaft E12 and 3# intermediate shaft E13 to make the slings S16 & S17 at the lifting points D7 & D10 bear force, and make the slings S14, S15, S16, S17 and pneumatic hoists at the lifting points D7, D8, D9, D10 bear force roughly evenly, and increase the safety redundancy of the lifting points D7, D8, D9, D10; the height of the temporary placement of the shaft ensures that the flange is higher than the height of the shaft system, which is convenient for the subsequent axis lighting operation; Step 7: Reference Figure 11-Figure 12 , by setting the lifting points at the central position D2&D5 and the left and right sides D1&D6 and the pneumatic hoists 4&7, 2&8, 3&9 and the slings S4&S5, S6&S8, S7&S9 installed below, the slings pull S6&S8, S4&S5S7&S9, S4&S5 in pairs to move A14 and A15, and move the 2# intermediate shaft E12 and the 3# intermediate shaft E13 from the central position D2&D5 to the left and right sides D1&D6 for hanging, and then adopt the method of step 6 to use the slings D1, D6, D3, D4 and the pneumatic hoists to roughly evenly bear the weight of the 2# intermediate shaft E12 and the 3# intermediate shaft E13, so as to increase the safety redundancy of the lifting points; Step 8: Reference Figure 1 , Fig.13 After temporarily hanging the 2# intermediate shaft E12 and the 3# intermediate shaft E13, move the 1# intermediate shaft E11 to the designated position according to the method of steps 2-5, and roughly evenly bear the weight of the 1# intermediate shaft E11 through the pneumatic hoists 4, 5, 6, 7 and slings on the hanging points D2&D3&D4&D5, the hand-pulled monorail trolley 16&17, so as to increase the safety redundancy of the hanging points; Step 9: Reference Fig.10During the formal installation, the propeller shaft E14 can be lifted a short distance upwards by the pneumatic hoist 10&11, and the force on the lifting points D7&D10 and the high-strength annular sling S16&S17 below is released, and then the sling S16&S17 is removed; at this time, the weight of the propeller shaft E14 is completely borne by the lifting points D8&D9, the pneumatic hoists 10&11 (a total of 4 units), and the high-strength annular slings S14&S15; operate the pneumatic hoists 10&11 (a total of 4 units) to lower the propeller shaft E14 to the position on the double-track workbench. The weight of the propeller shaft E14 is completely borne by the double-track trolley 13&14 on the beam H3, and then the surface of the propeller shaft E14 is degreased and cleaned; the degreasing and cleaning operation can utilize the pneumatic hoists 10&11, a total of 4 units, to move up and down, move the double-track trolleys 13&14 forward and backward, and operate the pneumatic hoists 10&11 to rise on one side and lower on the other side A16 through the strength annular slings S14&S15 to realize the rotation of the shaft A17, which is convenient for large-diameter propeller shafts.

[0020] Step 10: Reference Fig.14 , using the double-track trolley 13 & 14 located on the double-track I-beam H3 to assist in adjusting the height and left and right position of the propeller shaft E14, see utility model CN201620954892.3, to facilitate the insertion of the propeller shaft E14 into the stern tube bearing before alignment; Step 11: Reference Figure 15-17 , through the compact sliding device D11 / D12 arranged on the end face of the stern tube and the shaft moving force anchor point D13 / D14 on the bearing stand MS4, one end of the shaft moving traction wire rope sling S18 / S19 is fixed to the flange of the propeller shaft E14, and the other end is connected to the force anchor point D13 / D14 through the shaft moving pneumatic hoist 21 / 22 after changing direction through the compact pulley device D11 / D12; Step 12: Operate the pneumatic hoist 21 / 22 to pull the traction wire rope S18 / S19 A18 to achieve the movement A18 of the propeller shaft E14, and complete the operation of inserting the propeller shaft E14 into the shaft tube.

[0021] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A method for lifting and installing a shaft system of a large container ship, characterized in that: The lifting tool comprises a lifting tool, wherein the lifting tool comprises a single-track I-beam (H1) for axle movement arranged at the center of the hull above the intermediate shaft (E11, E12, E13), and a double-track I-beam (H2, H3) is arranged below the intermediate shaft (E11, E12, E13), and a double-track trolley (12-14) for axle movement is arranged on the double-track I-beam (H2, H3); three hand-pulled monorail trolleys (15-17) are suspended below the single-track I-beam (H1), and the hand-pulled monorail trolleys A lifting beam (18-20) is installed below each of the shafts (15-17) for inserting the shaft-belt generator (E10) into the No. 1 intermediate shaft (E11) during subsequent operations; the lifting beam (18-20) of the hand-pulled monorail trolley (15-17) and the lifting points of each shaft for movement are provided with a pneumatic hoist (1-11) for lifting; each lifting point on the shaft is provided with two pneumatic hoists (1-11) through a ring-shaped lifting belt, and a single shaft can be lifted by at least four pneumatic hoists (1-11) at the same time.

2. A method for lifting and installing a shaft system of a large container ship according to claim 1, characterized in that: The lifting capacity requirement of the pneumatic hoist (1-11) is 1 / 4 of the axle weight.

3. A method for lifting and installing a shaft system of a large container ship according to claim 1, characterized in that: In addition to the pneumatic hoist (1-11) lifting points, backup lifting points (D3 / D4, D7 / D10) are arranged at places, and special lifting belts (S10 / 11, S12 / 13, S14, S15, S18, S19) are also arranged. The length of the lifting belt is calculated according to the height of the shaft suspension. When a single shaft is suspended for a long time, there are a total of 8 lifting points that bear the weight of the shaft at the same time, and the load-bearing capacity of a single lifting point is 1 / 8 of the weight of the shaft.

4. A method for lifting and installing a shaft system of a large container ship according to claim 1, characterized in that: The propeller shaft (E14) and the 1# intermediate shaft (E11) are arranged in the center, and the 2# intermediate shaft (E12) and the 3# intermediate shaft (E13) are arranged on both sides. The lower ends of the flanges of the propeller shaft (E14) and the 1# intermediate shaft (E11) can be lifted by a pneumatic hoist (1-11) to be 500 mm higher than the axis without affecting the illumination of the axis. After the propeller shaft (E14) and the intermediate shafts (E11, E12, E13) are temporarily suspended in the shaft room, the main engine (E00) can be hoisted and loaded.

5. A method for lifting and installing a shaft system of a large container ship according to claim 4, characterized in that: The propeller shaft (E14) and each intermediate shaft (E11, E12, E13) are temporarily suspended at the shaft room at points where they are subjected to force, and the form of the structural lifting lugs is determined and corresponding reinforcement strips are added.

6. A method for hoisting and installing a shaft system of a large container ship according to claim 5, characterized in that: The form of the structural lifting lugs and the arrangement of the corresponding additional reinforcement strips shall be included in the management of the hull structure production design drawings before the start of section construction. If there is interference with other hull components, pipelines, or circuits, coordination shall be carried out with the relevant professional responsible persons before the production design drawings are issued to ensure that the lifting lugs are permanently retained as part of the hull and do not need to be cut off after the operation is completed.

7. A method for lifting and installing a shaft system of a large container ship according to claim 1, characterized in that: The following steps are involved: Step 1: Use two ring-shaped high-strength slings (S18 & S19) of suitable lifting weight to tie them equally on both sides of the center of gravity of the propeller shaft (E14) by inserting and tying them, and hang them on the hook (21) of the dock gantry crane and lift them into the (A1) engine room; Step 2: Set a support platform (B1) and sleepers (B2 & B3) on the inner bottom of the main engine platform (E00); pass two hand-pulled monorail trolleys (16 & 17) with hanging beams (19 & 20) toward one end of the shaft room, and wrap the high-strength annular sling (S2 & S3) around the propeller shaft (E14) in the form of a sling, operate the dock crane to continue to descend (A1), and at the same time, operate the pneumatic hoists (5 & 6) (2 at each location) on the hand-pulled monorail trolley (16 & 17) to move upward (A2) so that the hand-pulled monorail trolley (16 & 17), hanging beams (19 & 20), pneumatic hoists (5 & 6), and slings (S2 & S3) combination begins to bear force; until the weight of the propeller shaft (E14) is completely supported by the hand-pulled monorail trolley. The lifting hook (21) is then moved forward (A3) to the position close to the front flange, and the lifting hook (21) is hooked around the propeller shaft (E14) to bear the force; the pneumatic hoist (5&6) and the lifting hook (21) are then moved upward at the same time to lift the propeller shaft (E14) (A2) for a short distance, and then the sleepers (B2&B3) are removed (A4) so ​​that the flange of the propeller shaft (E14) can pass through the support platform (B1), and the monorail trolley (16, 17) and the dock crane are operated to move backward at the same time (A5) until the lifting point at the front flange cannot move backward any further; Step 3: When the dock crane cannot move backward any further, the high-strength annular sling (S1) is wrapped around the propeller shaft (E14) in a sling-like manner, and the pneumatic hoist (1) (a total of 2 units) is operated to move upward (A6), so that the third hand-pulled monorail trolley (15) located at the front of the monorail I-beam (H1) bears the weight of the propeller shaft (E14) through the lifting beam (18), and then the hook of the dock crane continues to descend and leave (A8); Step 4: After the lifting point consisting of the middle set of trolleys (16) and the lifting beam (19), the pneumatic hoist (5) (a total of 2 sets) and the high-strength annular lifting belt (S2) is moved forward (A7) to a position close to the center of gravity of the propeller shaft (E14), the three sets of hand-pulled monorail trolleys (15, 16, 17) are combined to share the weight of the propeller shaft (E14) through the lifting points, and then the three sets of hand-pulled monorail trolleys (15, 16, 17) are operated to move backward at the same time (A9) to the top of the two double-track trolleys (13 & 14) located on the double-track I-beam (H3); Step 5: Use pneumatic hoists (1, 5, 6) (a total of 6 units) to lower (A10) the propeller shaft (E14) onto the two double-track trolleys (13 & 14) on the double-track I-beam (H3). The propeller shaft (E14) is moved backward (A11) to the designated position by the double-track trolleys (13 & 14). The remaining intermediate shafts (E11, E12, E13) can be moved to the designated positions in the manner described in the above steps. Step 6: Use the lifting points (D8 & D9) with pneumatic hoists (10 & 11) (4 in total) to lift (A12) the 2# intermediate shaft (E12) and the 3# intermediate shaft (E13) to the specified height (slightly higher than the S16 & S17 slings) by using the high-strength circular slings (S14 & S15); then use the customized high-strength circular slings (S16 & S17) at the lifting points (D7, D10) to hold the 2# intermediate shaft (E12) and the 3# intermediate shaft (E13) (A13) Then, use pneumatic hoists 10 & 11 (4 in total) to lower the 2# intermediate shaft (E12) and 3# intermediate shaft (E13) to make the slings (S16 & S17) at the lifting points (D7 & D10) bear force, so that the slings (S14, S15, S16, S17) and pneumatic hoists at the lifting points (D7, D8, D9, D10) are roughly evenly stressed, increasing the safety redundancy of the lifting points (D7, D8, D9, D10); the height of the temporary placement of the shaft ensures that the flange is higher than the height of the shaft system, which is convenient for the subsequent axis lighting operation; Step 7: By setting the lifting points at the central position (D2&D5) and the left and right ports (D1&D6) and the pneumatic hoists (4&7, 2&8, 3&9) and slings (S4&S5, S6&S8, S7&S9) installed below, the slings are pulled in pairs (S6&S8, S4&S5) (S7&S9, S4&S5) to move the 2# intermediate shaft (E12) and the 3# intermediate shaft (E13) from the central position (D2&D5) to the left and right ports (D1&D6) for suspension. Then, the slings (D1, D6, D3, D4) and the pneumatic hoists are used in the manner of step 6 to roughly evenly bear the weight of the 2# intermediate shaft (E12) and the 3# intermediate shaft (E13), thereby increasing the safety redundancy of the lifting points. Step 8: After the temporary suspension of the 2# intermediate shaft (E12) and the 3# intermediate shaft (E13) is completed as shown in Figures 1 and 10, the 1# intermediate shaft (E11) is moved to the designated position in accordance with the method of steps 2 to 5, and the weight of the 1# intermediate shaft (E11) is roughly evenly supported by the pneumatic hoists (4, 5, 6, 7) and slings on the hanging points (D2&D3&D4&D5), the hand-pulled monorail trolley (16&17), and the slings, thereby increasing the safety redundancy of the hanging points; Step 9: During the formal installation, the propeller shaft (E14) can be lifted a short distance by the pneumatic hoist (10&11), and the force on the lifting points (D7&D10) and the high-strength annular sling (S16&S17) below is released, and then the sling (S16&S17) is removed; at this time, the weight of the propeller shaft (E14) is completely borne by the lifting points (D8&D9), the pneumatic hoists (10&11) (4 units in total) and the high-strength annular sling (S14&S15); operate the pneumatic hoists (10&11) (4 units in total) to lower the propeller shaft (E14) to the double-track trolley (13&14) located on the double-track I-beam (H3), and the weight of the propeller shaft (E14) is completely borne by the double-track trolley (13&14), and then the surface of the propeller shaft (E14) is degreased and cleaned; Step 10: Use the double-track trolley (13 & 14) on the double-track I-beam (H3) to help adjust the height and left-right position of the propeller shaft (E14) to facilitate the alignment of the propeller shaft (E14) before inserting it into the stern tube bearing; Step 11: Through the compact pulley device (D11 / D12) arranged on the end face of the stern tube and the shaft moving force anchor point (D13 / D14) on the bearing stand (MS4), one end of the shaft moving traction wire rope sling (S18 / S19) is fixed to the flange of the propeller shaft (E14), and the other end is connected to the force anchor point (D13 / D14) through the shaft moving pneumatic hoist (21 / 22) after changing direction through the compact pulley device (D11 / D12); Step 12: Operate the pneumatic hoist (21 / 22) to pull (A18) the traction wire rope (S18 / S19) to move the propeller shaft (E14) (A18), and complete the operation of inserting the propeller shaft (E14) into the shaft tube.

8. A method for hoisting and installing a shaft system of a large container ship according to claim 7, characterized in that: The oil removal and cleaning operation can utilize the up and down movement of the pneumatic hoists (10 & 11) (a total of 4 units), the forward and backward movement of the double-track trolleys (13 & 14), and the operation of the pneumatic hoists (10 & 11) to raise one side and lower the other side (A16) to achieve the rotation of the shaft (A17) through the strength ring sling (S14 & S15), which is convenient for the large-diameter propeller shaft.

Images