Method of replacing a propeller of a container ship

Abstract

The application discloses a container ship propeller replacement installation method, which comprises the following steps: a, the container ship enters a floating dock seat pier, and a barge is parked at the tail of the floating dock; b, a hoisting lug is installed on the corresponding ship outer plate of the upper part of an old propeller; c, a propeller special lifting ring is installed above the propeller hub; d, a hoist is hung on the hoisting lug; e, the lower end of the hoist is connected with the propeller special lifting ring through a rope ring and a shackle; f, a general cap for fixing the old propeller is removed; g, the hoist above the old propeller is operated until the old propeller is loosened from the tail shaft; h, the old propeller is in a relaxed state after being loosened; i, the old propeller is removed from the tail shaft; m, meanwhile, a new propeller is hoisted to the tail of the floating dock, and the new propeller is installed in place through reverse operation according to the removal steps, all tools are removed, and the propeller replacement is completed. The application is scientific, reasonable and safe, and effectively solves the bottleneck of the seat pier repair of a large ship entering a small dock.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of container ship propeller modification and replacement engineering, and particularly relates to a container ship propeller replacement and installation method. BACKGROUND

[0002] At present, the shipping market is highly competitive, and the shipping industry seeks to reduce costs and increase efficiency through technical improvement. At the same time, the global environment is deteriorating, and green new energy ships are increasingly favored. In order to comply with the international trend of development and energy saving and emission reduction of ships, major shipping companies modify the operating ships to reduce transportation costs, save energy, and reduce carbon emissions. By reducing the design speed, adjusting the type of propeller, and adjusting the speed of the main engine, about 8%-12% of fuel consumption can be reduced during operation. The modification cost can be recovered in one year, and long-term economic benefits can be created. The replacement of the propeller of the container ship is one of the important modification projects. Generally, the ship is docked and seated after entering the dock, the entire ship is in the dock, and about 50-60 tons of old propeller is removed from the tail shaft using a flatbed transport vehicle and a tool. About 35 tons of new propeller is transported and installed in place using a flatbed transport vehicle. However, the dock period is tight, and the length of the ship is longer than the length of the floating dock. The propeller is located at the stern of the ship, and the propeller is suspended on the water surface outside the floating dock. Therefore, the flatbed transport vehicle and the tool cannot be used to replace the propeller. In order to solve the problem of replacing the propeller outside the dock, a scientific, reasonable, and safe propeller replacement and installation method is necessary. SUMMARY

[0003] The purpose of the present application is to provide a scientific, reasonable, and safe container ship propeller replacement and installation method.

[0004] The technical solution adopted by the present application to achieve the above purpose is as follows: a container ship propeller replacement and installation method, comprising the following steps:

[0005] a. The container ship (2) enters the floating dock (4) and seats the dock, and the barge (5) is parked at the stern of the floating dock (4);

[0006] b. Six inverted lifting lugs (7) are installed on the corresponding outer plate above the old propeller (1), and the rudder blade (3) is turned to the left to the maximum angle of 30 degrees;

[0007] c. A propeller special lifting ring (13) is installed above the hub of the old propeller (1);

[0008] d. A first 100-ton pneumatic hoist (8) and a second 100-ton pneumatic hoist (11) are respectively hung on the two hauling lugs (7), and a first 25-ton electric hoist (9) and a second 25-ton electric hoist (10) are respectively hung on the remaining four hauling lugs (7). The hauling lugs (7) are connected to the first 100-ton pneumatic hoist (8), the first 25-ton electric hoist (9), the second 25-ton electric hoist (10), and the second 100-ton pneumatic hoist (11) by shackles.

[0009] e. The lower ends of the first 100-ton pneumatic hoist (8), the first 25-ton electric hoist (9), the second 25-ton electric hoist (10), and the second 100-ton pneumatic hoist (11) are connected to the propeller-specific lifting ring (13) using a shackle with a rope loop (12);

[0010] f. Remove the general's cap (6) that secures the old propeller (1);

[0011] g. The first 100-ton pneumatic hoist (8) and the second 100-ton pneumatic hoist (11) directly above the old propeller (1) are subjected to force, and the first 25-ton electric hoist (9) and the second 25-ton electric hoist (10) are subjected to force until the old propeller (1) and the tail shaft (16) are relatively loose.

[0012] h. After the old propeller (1) is loosened, the two first 25-ton electric hoists (9) at the front end are in a relaxed state;

[0013] i. The two second 25-ton electric hoists (10) at the tail end and the first 100-ton pneumatic hoist (8) and the second 100-ton pneumatic hoist (11) directly above the old propeller (1) work together to move the old propeller (1) backward and move the old propeller (1) out of the tail shaft (16);

[0014] j. When the old propeller (1) comes out from the tail shaft (16), operate the two second 25-ton electric hoists (10) at the tail of the old propeller (1), tightening and extending, and the old propeller (1) moves to the left.

[0015] k. Operate two 100-ton pneumatic hoists (8) and 100-ton pneumatic hoists (11) in coordination. The 100-ton pneumatic hoist (11) tightens and the 100-ton pneumatic hoist (8) extends, moving the old propeller (1) backward. Finally, only the 100-ton pneumatic hoist (11) at the tail is subjected to force.

[0016] l, the steel wire rope of the floating crane hook head (14) is connected with the shackles of the propeller special lifting ring (13), the floating crane hook head (14) is slowly lifted, the second 100-ton pneumatic hoist (11) is not stressed, the first 100-ton pneumatic hoist (8), the first 25-ton electric hoist (9), the second 25-ton electric hoist (10) and the lower end hook of the second 100-ton pneumatic hoist (11) are removed from the rope ring (12), and the floating crane hook head (14) hoists the old propeller (1) to the wharf and drops it;

[0017] m, at the same time, the new propeller (15) is hoisted to the deck of the barge (5) at the stern of the floating dock (4), and the rope ring (12) is connected with the propeller special lifting ring (13) using shackles;

[0018] n, the floating crane hook head (14) is lifted to the lower end hook of the second 100-ton pneumatic hoist (11), and the lower end hook of the second 100-ton pneumatic hoist (11) is connected with the rope ring (12), the second 100-ton pneumatic hoist (11) is tightened, and the steel wire rope connecting the floating crane hook head (14) with the propeller special lifting ring (13) is removed;

[0019] o, the lower end hook of the first 100-ton pneumatic hoist (8), the first 25-ton electric hoist (9) and the second 25-ton electric hoist (10) is connected with the rope ring (12) of the propeller special lifting ring (13), after connection, the first 100-ton pneumatic hoist (8) is tightened, while the second 100-ton pneumatic hoist (11) is loosened, the new propeller (15) is moved forward and the two second 25-ton electric hoists (10) at the stern are tightened, and the two second 25-ton electric hoists (10) cooperate to adjust the new propeller (15) to the position of the stern shaft (16);

[0020] p, continue to loosen the second 100-ton pneumatic hoist (11) and the second 25-ton electric hoist (10), tighten the first 100-ton pneumatic hoist (8) and the first 25-ton electric hoist (9), and move the new propeller (15) to the installation position of the stern shaft (16);

[0021] q, after installing the general cap (6), all tools are removed, and the propeller replacement is completed.

[0022] In step a, an 800-ton barge (5) is parked at the stern of the floating dock (4).

[0023] In steps e, l, m, n and o, the diameter of the rope ring (12) is 80mm*2m.

[0024] In step j, the old propeller (1) is shifted 1m to the left.

[0025] In step k, the old propeller (1) is shifted 5.5m to the rear.

[0026] In the step o, the new propeller (15) is moved forward by 5.5 m.

[0027] The container ship propeller replacement installation method effectively solves the situation that the length of the ship exceeds the length of the floating dock, the propeller is suspended on the water surface outside the floating dock, and the propeller is replaced by using the hoist to transport the propeller outside the dock, effectively solves the bottleneck of the docking repair of the large ship into the small dock, and makes more production value from working hours. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 is a container ship docking seat diagram of the container ship propeller replacement installation method of the application.

[0029] Figure 2 is a hoist lug arrangement diagram of the hoisted propeller of the container ship propeller replacement installation method of the application.

[0030] Figure 3 is Figure 2 A-A sectional view.

[0031] Figure 4 is Figure 2 B-B sectional view.

[0032] Figure 5 is Figure 2 C-C sectional view.

[0033] Figure 6 is a hoist lug arrangement diagram of the hoisted propeller of the container ship propeller replacement installation method of the application.

[0034] Figure 7 is Figure 6 D-D sectional view.

[0035] Figure 8 is Figure 6 E-E sectional view.

[0036] Figure 9 is Figure 6 F-F sectional view.

[0037] Figure 10 is a hoist lug arrangement diagram of the hoisted propeller of the container ship propeller replacement installation method of the application. Figure 1 .

[0038] Figure 11 is a hoist lug arrangement diagram of the hoisted propeller of the container ship propeller replacement installation method of the application. Figure 2 .

[0039] Figure 12Figure 1 is a schematic diagram of the process of unloading the propeller according to the container ship propeller replacement and installation method of the present application Figure 3 .

[0040] Figure 13 Figure 1 is a schematic diagram of the process of unloading the propeller according to the container ship propeller replacement and installation method of the present application Figure 4 .

[0041] Figure 14 Figure 1 is a schematic diagram of the process of unloading the propeller according to the container ship propeller replacement and installation method of the present application Figure 12 .

[0042] Figure 15 Figure 1 is a schematic diagram of the process of unloading the propeller according to the container ship propeller replacement and installation method of the present application Figure 13 .

[0043] Figure 16 Figure 1 is a schematic diagram of the process of unloading the propeller according to the container ship propeller replacement and installation method of the present application Figure 1 .

[0044] Figure 17 Figure 1 is a schematic diagram of the process of unloading the propeller according to the container ship propeller replacement and installation method of the present application Figure 2 .

[0045] Figure 1 is a schematic diagram of the process of unloading the propeller according to the container ship propeller replacement and installation method of the present application DETAILED DESCRIPTION

[0046] As Figures 1 to 17The container ship propeller replacement installation method shown, including the following steps: a, container ship 2 into the floating dock 4 seat, in the stern of a floating dock 4 800 tons of barge 5; b, the old propeller 1 upper corresponding ship plate on the installation of six hoisting lug 7, and the rudder 3 to the left to the maximum angle 30 degrees; c, the old propeller 1 hub above the installation of propeller special lifting ring 13; d, in two hoisting lug 7 respectively hang the first 100 tons of pneumatic hoist 8 and the second 100 tons of pneumatic hoist 11, in the remaining four hoisting lug 7 respectively hang the first 25 tons of electric hoist 9 and the second 25 tons of electric hoist 10, hoisting lug 7 and the first 100 tons of pneumatic hoist 8, the first 25 tons of electric hoist 9, the second 25 tons of electric hoist 10, the second 100 tons of pneumatic hoist 11 between the use of shackle connection; e, the first 100 tons of pneumatic hoist 8, the first 25 tons of electric hoist 9, the second 25 tons of electric hoist 10 and the second 100 tons of pneumatic hoist 11 lower end using diameter 80mm*2m rope ring 12 and propeller special lifting ring 13 using shackle connection; f, remove the general hat 6 fixed old propeller 1; g, the first 100 tons of pneumatic hoist 8 and the second 100 tons of pneumatic hoist 11 above the old propeller 1 are operated under stress, the first 25 tons of electric hoist 9 and the second 25 tons of electric hoist 10 are operated under stress, until the old propeller 1 and the tail shaft 16 are loose; h, after the old propeller 1 is loosened, the two first 25 tons of electric hoist 9 at the front end are in a relaxed state; i, tighten the two second 25 tons of electric hoist 10 at the tail and operate the first 100 tons of pneumatic hoist 8 and the second 100 tons of pneumatic hoist 11 above the old propeller 1 to cooperate with each other, move the old propeller 1 backward, and displace the old propeller 1 from the tail shaft 16; j, when the old propeller 1 is out of the tail shaft 16, operate the two second 25 tons of electric hoist 10 at the tail of the old propeller 1, one of which is tightened and the other is elongated, and the old propeller 1 is shifted left by 1m; k, operate two first 100 tons of pneumatic hoist 8 and second 100 tons of pneumatic hoist 11, second 100 tons of pneumatic hoist 11 is tightened, first 100 tons of pneumatic hoist 8 is elongated, and old propeller 1 is shifted backward 5.5m, only the tail of the second 100 tons of pneumatic hoist 11 force; l, the wire rope of the floating crane hook head 14 is connected with the shackle of the propeller special lifting ring 13, the floating crane hook head 14 is slowly lifted, the second 100 tons of pneumatic hoist 11 is not forced, the first 100 tons of pneumatic hoist 8, the first 25 tons of electric hoist 9, the second 25 tons of electric hoist 10 and the second 100 tons of pneumatic hoist 11 are removed from the 80mm*2m rope ring 12, the floating crane hook head 14 hoists the old propeller 1 to the wharf and drops it; m, at the same time, the new propeller 15 is hoisted to the deck of the barge 5 at the stern of the floating dock 4, and the 80mm*2m rope ring 12 is connected with the propeller special lifting ring 13 using the shackle; n, the floating crane hook head 14 hoists the new propeller 15 to the lower end hook of the second 100 tons of pneumatic hoist 11, and the lower end hook of the second 100 tons of pneumatic hoist 11 is connected with the 80mm*2m rope ring 12, the second 100 tons of pneumatic hoist 11 is tightened, and the steel wire rope connected with the propeller special lifting ring 13 of the floating crane hook head 14 is removed; o, the lower end hook of the first 100 tons of pneumatic hoist 8, the first 25 tons of electric hoist 9 and the second 25 tons of electric hoist 10 is connected with the 80mm*2m rope ring 12 connected with the propeller special lifting ring 13, after connection, the first 100 tons of pneumatic hoist 8 is tightened, and the second 100 tons of pneumatic hoist 11 is loosened, the new propeller 15 is moved forward by 5.5m, and the two second 25 tons of electric hoists 10 are tightened, and the new propeller 15 is adjusted to the end position of the stern shaft 16; p, continue to loosen the second 100 tons of pneumatic hoist 11 and the second 25 tons of electric hoist 10, tighten the first 100 tons of pneumatic hoist 8, the first 25 tons of electric hoist 9, and the new propeller 15 is transported to the installation position of the stern shaft 16; q, after installing the general hat 6, all tools are removed, and the propeller replacement is completed; the container ship propeller replacement installation method effectively solves the problem that the propeller is replaced by using the hoist transportation method when the ship length exceeds the length of the floating dock and the propeller is suspended outside the dock, effectively solves the bottleneck of large ship repair in small dock, and creates more output value.

Claims

1. A method of propeller replacement installation for a container ship, characterized by, The method comprises the following steps: a. The container ship (2) enters the floating dock (4) and is stopped at the barge (5) at the tail of the floating dock (4); b. Six reverse transportation lifting lugs (7) are installed on the corresponding outer plates above the old propeller (1), and the rudder blade (3) is turned to the left to the maximum angle of 30 degrees; c. A propeller special lifting ring (13) is installed above the boss of the old propeller (1); d. The first 100-ton pneumatic hoist (8) and the second 100-ton pneumatic hoist (11) are respectively hung on two reverse transportation lifting lugs (7), and the first 25-ton electric hoist (9) and the second 25-ton electric hoist (10) are respectively hung on the remaining four reverse transportation lifting lugs (7), and the reverse transportation lifting lugs (7) are connected with the first 100-ton pneumatic hoist (8), the first 25-ton electric hoist (9), the second 25-ton electric hoist (10) and the second 100-ton pneumatic hoist (11) through shackles; e. The lower ends of the first 100-ton pneumatic hoist (8), the first 25-ton electric hoist (9), the second 25-ton electric hoist (10) and the second 100-ton pneumatic hoist (11) are connected with the shackles of the propeller special lifting ring (13) through the rope ring (12); f. The general cap (6) for fixing the old propeller (1) is removed; g. The first 100-ton pneumatic hoist (8) and the second 100-ton pneumatic hoist (11) above the old propeller (1) are stressed, and then the first 25-ton electric hoist (9) and the second 25-ton electric hoist (10) are stressed until the old propeller (1) is relatively loose with the tail shaft (16); h. After the old propeller (1) is loosened, the two first 25-ton electric hoists (9) at the front end are in a relaxed state; i. The two second 25-ton electric hoists (10) at the tail are tightened, and the first 100-ton pneumatic hoist (8) and the second 100-ton pneumatic hoist (11) above the old propeller (1) are cooperated to move the old propeller (1) backward and displace the old propeller (1) from the tail shaft (16); j. After the old propeller (1) is displaced from the tail shaft (16), the two second 25-ton electric hoists (10) at the tail of the old propeller (1) are tightened and elongated, and the old propeller (1) is displaced to the left; k. The first 100-ton pneumatic hoist (8) and the second 100-ton pneumatic hoist (11) are cooperated to move the old propeller (1) backward, and finally only the second 100-ton pneumatic hoist (11) at the tail is stressed; l. The steel wire rope of the floating crane hook head (14) is connected with the shackles of the propeller special lifting ring (13), the floating crane hook head (14) is slowly lifted, the second 100-ton pneumatic hoist (11) is not stressed, the lower hook heads of the first 100-ton pneumatic hoist (8), the first 25-ton electric hoist (9), the second 25-ton electric hoist (10) and the second 100-ton pneumatic hoist (11) are removed from the rope ring (12), and the old propeller (1) is lifted to the wharf by the floating crane hook head (14) and is dropped. m, while lifting the new propeller (15) to the deck of the barge (5) at the stern of the floating dock (4), connecting the rope ring (12) with the propeller-specific lifting ring (13) of the new propeller (15) using a shackle; n, lifting the floating crane hook (14) to lift the new propeller (15) to the lower hook of the second 100-ton pneumatic hoist (11), connecting the lower hook of the second 100-ton pneumatic hoist (11) with the rope ring (12), tightening the second 100-ton pneumatic hoist (11), and removing the steel wire rope connecting the floating crane hook (14) with the propeller-specific lifting ring (13) of the new propeller (15); o, connecting the lower hooks of the first 100-ton pneumatic hoist (8), the first 25-ton electric hoist (9), and the second 25-ton electric hoist (10) with the rope ring (12) connecting the propeller-specific lifting ring (13) of the new propeller (15), after connecting, tightening the first 100-ton pneumatic hoist (8), while loosening the second 100-ton pneumatic hoist (11), moving the new propeller (15) forward, and then tightening the two second 25-ton electric hoists (10) at the stern, the two second 25-ton electric hoists (10) adjust the new propeller (15) to the end of the tail shaft (16); p, continue to loosen the second 100-ton pneumatic hoist (11) and the second 25-ton electric hoist (10), tighten the first 100-ton pneumatic hoist (8) and the first 25-ton electric hoist (9), and move the new propeller (15) to the installation position of the tail shaft (16); q, after installing the general cap (6), remove all tools, and complete the propeller replacement.

2. A method of propeller replacement installation for a container ship according to claim 1, characterized in that: In step a, an 800-ton barge (5) is parked at the stern of the floating dock (4).

3. A method of propeller replacement installation for a container ship according to claim 1, characterized in that: In steps e, l, m, n, and o, the diameter of the rope ring (12) is 80mm*2m.

4. A method of propeller replacement installation for a container ship according to claim 1, characterized in that: In step j, the old propeller (1) is shifted 1m to the left.

5. A method of propeller replacement installation for a container ship according to claim 1, characterized in that: In step k, the old propeller (1) is shifted 5.5m to the rear.

6. A method of propeller replacement installation for a container ship according to claim 1, characterized in that: In step o, the new propeller (15) is moved 5.5m forward.

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