Container ship propeller replacement and installation method

Abstract

The invention discloses a container ship propeller replacement and installation method, which comprises the following steps that a, a container ship enters a floating dock seat pier, and a barge is stopped at the tail part of a floating dock; b, a reshipment lifting lug is installed on a ship outer plate corresponding to the upper portion of the old propeller; c, mounting a special lifting ring for the propeller above the hub of the old propeller; d, hoists are hung on the reshipment lifting lugs respectively; e, the lower end of the hoist is connected with a special propeller lifting ring through a shackle by using a rope loop; f, dismounting the propeller cap for fixing the old propeller; g, operating a hoist right above the old propeller until the old propeller is loosened from the tail shaft; h, after the old propeller is loosened, the old propeller is in a loose state; i, the old propeller is moved out of the tail shaft; and m, meanwhile, the new propeller is hoisted to the tail of the floating dock, reverse operation is carried out according to the dismantling steps, the new propeller is installed in place, all tools are dismantled, and replacement of the new propeller is completed. The method is scientific, reasonable and safe, and effectively solves the bottleneck of pier repair when a large ship enters a small dock.

Description

Technical Field

[0001] The invention relates to the field of container ship propeller reconstruction and renewal engineering, and in particular to a container ship propeller renewal and installation method. Background Art

[0002] At present, the shipping market is highly competitive. The shipping industry seeks to reduce costs and increase efficiency through technical transformation. At the same time, the deterioration of the global environment has attracted much attention. The design and construction of green new energy ships are becoming more and more popular. In order to comply with the international trend of the development of the shipping industry and the energy conservation and emission reduction of ships, major shipping companies have transformed the operating ships to reduce transportation costs, save energy, and reduce carbon emissions. By reducing the design speed, replacing the propeller style and adjusting the speed of the main engine, the fuel consumption can be reduced by about 8%-12% during the operation process. The transformation cost can be recovered in one year, and it can create huge economic benefits in the long run. Replacing the propeller of container ships is an important transformation. One of the installation projects is that after the ship enters the dock, the whole ship is in the dock. A flatbed transporter is used with tooling to remove the old propeller of about 50-60 tons from the tail shaft by transportation. Then a new propeller of about 35 tons is transported and installed in place using a flatbed truck. However, the docking period of the ship repair yard is tight, and the ship length is often longer than the length of the floating dock before entering the floating dock for repair. The propeller is located at the stern of the ship and is suspended on the outside of the floating dock above the water. Therefore, a flatbed truck and tooling cannot be used to cooperate with the propeller to replace the propeller. In order to solve the problem of replacing the propeller when the propeller side is outside the dock, a scientific, reasonable and safe propeller replacement and installation method design is essential. Summary of the invention

[0003] The purpose of the invention is to provide a scientific, reasonable and safe method for replacing and installing a propeller of a container ship.

[0004] The technical solution adopted by the present invention to achieve the above-mentioned purpose is: a method for replacing and installing a propeller of a container ship, comprising the following steps: a. The container ship (2) enters the floating dock (4) and docks the barge (5) at the rear of the floating dock (4); b. Install six reverse lifting lugs (7) on the corresponding outer plate of the old propeller (1), and steer the rudder blade (3) to the left to a maximum angle of 30 degrees; c. Install the propeller-specific lifting ring (13) above the hub of the old propeller (1); d. A first 100-ton pneumatic hoist (8) and a second 100-ton pneumatic hoist (11) are respectively hung on two reverse lifting eyes (7), and a first 25-ton electric hoist (9) and a second 25-ton electric hoist (10) are respectively hung on the remaining four reverse lifting eyes (7), and a shackle is used to connect the reverse lifting eyes (7) 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); 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 special lifting ring (13) using a shackle using a rope loop (12); f. Remove the general cap (6) that secures the old propeller (1); g. Operate the first 100-ton pneumatic hoist (8) and the second 100-ton pneumatic hoist (11) directly above the old propeller (1) to apply force, and then operate the first 25-ton electric hoist (9) and the second 25-ton electric hoist (10) to apply force until the old propeller (1) and the tail shaft (16) are relatively loosened; 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. Tighten the two second 25-ton electric hoists (10) at the tail and operate the first 100-ton pneumatic hoist (8) and the second 100-ton pneumatic hoist (11) directly above the old propeller (1) to cooperate with each other to move the old propeller (1) backward and remove the old propeller (1) from the tail shaft (16); j. After the old propeller (1) comes out of the tail shaft (16), operate the two second 25-ton electric hoists (10) at the tail of the old propeller (1), one to tighten and the other to extend, so that the old propeller (1) moves to the left; k. Operate the first 100-ton pneumatic hoist (8) and the second 100-ton pneumatic hoist (11) to cooperate, tighten the second 100-ton pneumatic hoist (11), extend the first 100-ton pneumatic hoist (8), and move the old propeller (1) backwards, so that only the second 100-ton pneumatic hoist (11) at the rear is subjected to force; 1. The steel wire rope of the floating hook head (14) is connected to the shackle of the special lifting ring (13) of the propeller, and the floating hook head (14) is slowly lifted. The second 100-ton pneumatic hoist (11) is not subjected to force, and the lower end hooks 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 loop (12). The floating hook head (14) lifts the old propeller (1) to the dock and drops it; m. At the same time, the new propeller (15) is hoisted onto the deck of the barge (5) at the rear of the floating dock (4), and the rope loop (12) is connected to the special lifting ring (13) for the propeller using a shackle; n. Lift the floating hook head (14) to lift the new propeller (15) to the lower hook head of the second 100-ton pneumatic hoist (11), connect the lower hook head of the second 100-ton pneumatic hoist (11) to the rope ring (12), tighten the second 100-ton pneumatic hoist (11), and remove the wire rope connecting the floating hook head (14) and the special lifting ring (13) for the propeller; o. Connect 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) to the connecting rope loop (12) of the propeller special lifting ring (13). After the connection is completed, tighten the first 100-ton pneumatic hoist (8) and loosen the second 100-ton pneumatic hoist (11). After the new propeller (15) is moved forward, tighten the two second 25-ton electric hoists (10) at the rear. The two second 25-ton electric hoists (10) cooperate to adjust the new propeller (15) to the end position 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 transport 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.

[0005] In step a, an 800-ton barge (5) is docked at the rear of the floating dock (4).

[0006] In the steps e, l, m, n and o, the diameter of the rope loop (12) is 80 mm*2 m.

[0007] In step j, the old propeller (1) is shifted 1 m to the left.

[0008] In step k, the old propeller (1) is displaced 5.5 m backwards.

[0009] In step o, the new propeller (15) is moved forward in reverse by 5.5 m.

[0010] The invention discloses a method for replacing and installing a propeller of a container ship, which effectively solves the problem that when a ship length exceeds the length of a floating dock and enters a pier of a floating dock, and the propeller is outside the floating dock and suspended on the water surface, a hoist is used to reversely transport the propeller side outside the dock to replace the propeller, which effectively solves the bottleneck of repairing the pier of a large ship entering a small dock and creates more output value by man-hours. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1The present invention is a schematic diagram of a container ship docking pier according to a method for replacing and installing a propeller of a container ship.

[0012] Figure 2 The invention discloses a layout diagram of a reverse lifting lug of a reverse propeller in a method for replacing and installing a propeller of a container ship.

[0013] Figure 3 yes Figure 2 AA section view.

[0014] Figure 4 yes Figure 2 BB section view.

[0015] Figure 5 yes Figure 2 CC section view.

[0016] Figure 6 The invention discloses a hoist arrangement diagram of a propeller for transporting a container ship in a method for replacing and installing a propeller.

[0017] Figure 7 yes Figure 6 DD section view.

[0018] Figure 8 yes Figure 6 EE section view.

[0019] Fig. 9 yes Figure 6 FF section view.

[0020] Fig.10 The present invention is a method for replacing and installing a container ship propeller. Figure 1 .

[0021] Fig.11 The present invention is a method for replacing and installing a container ship propeller. Figure 2 .

[0022] Fig.12 The present invention is a method for replacing and installing a container ship propeller. Figure 3 .

[0023] Fig.13 The present invention is a method for replacing and installing a container ship propeller. Figure 4 .

[0024] Fig.14 yes Fig.12 HH section view.

[0025] Fig.15 yes Fig.13 VV section view.

[0026] Fig.16 The present invention is a method for installing a new container ship propeller by a floating hook head to lift the propeller. Figure 1 .

[0027] Fig.17 The present invention is a method for installing a new container ship propeller by a floating hook head to lift the propeller. Figure 2 .

[0028] In the picture: 1. Old propeller; 2. Container ship; 3. Rudder blade; 4. Floating dock; 5. Barge; 6. General's cap; 7. Reverse lifting lug; 8. First 100-ton pneumatic hoist; 9. First 25-ton electric hoist; 10. Second 25-ton electric hoist; 11. Second 100-ton pneumatic hoist; 12. Rope ring; 13. Special lifting ring for propeller; 14. Floating hook head; 15. New propeller; 16. Tail shaft. DETAILED DESCRIPTION

[0029] like Figures 1 to 17As shown, the container ship propeller replacement installation method includes the following steps: a. The container ship 2 enters the floating dock 4 pier, and an 800-ton barge 5 is docked at the stern of the floating dock 4; b. Six reverse transportation lifting eyes 7 are installed on the outer plate corresponding to the upper part of the old propeller 1, and the rudder blade 3 is steered to the left to a maximum angle of 30 degrees; c. A propeller special lifting ring 13 is installed above the hub of the old propeller 1; d. A first 100-ton pneumatic hoist 8 and a second 100-ton pneumatic hoist 11 are respectively hung on two reverse transportation lifting eyes 7, and a pneumatic hoist 11 is installed on the remaining four reverse transportation lifting eyes 7. The first 25-ton electric hoist 9 and the second 25-ton electric hoist 10 are hung on the upper part respectively, and the reverse lifting eye 7 is 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 by a shackle; 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 a rope loop 12 with a diameter of 80mm*2m and a special lifting ring 13 for propellers by a shackle; f. g. Operate the first 100-ton pneumatic hoist 8 and the second 100-ton pneumatic hoist 11 above the old propeller 1 to apply force, and then operate the first 25-ton electric hoist 9 and the second 25-ton electric hoist 10 to apply force until the old propeller 1 and the tail shaft 16 are relatively loose; h. After the old propeller 1 is loosened, make the two first 25-ton electric hoists 9 at the front end in a relaxed state; i. Tighten the two second 25-ton electric hoists 10 at the tail and operate the first 100-ton pneumatic hoist 8 and the second 25-ton electric hoist 10 above the old propeller 1. The two 100-ton pneumatic hoists 11 cooperate with each other to shift the old propeller 1 backward and displace the old propeller 1 out of the tail shaft 16; j. When the old propeller 1 comes out of the tail shaft 16, operate the two second 25-ton electric hoists 10 at the tail of the old propeller 1, one tightens and the other extends, and the old propeller 1 shifts 1m to the left; k. Operate the two first 100-ton pneumatic hoists 8 and the second 100-ton pneumatic hoists 11 to cooperate, the second 100-ton pneumatic hoist 11 is tightened, the first 100-ton pneumatic hoist 8 is extended, and the old propeller 1 is shifted backward 5.5m, and finally only the second 100-ton pneumatic hoist 11 at the tail is stressed; l, the wire rope of the floating hook head 14 is connected to the shackle of the propeller special lifting ring 13, and the floating hook head 14 is slowly lifted. The second 100-ton pneumatic hoist 11 is not stressed, and the lower end hooks 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 loop 12 with a diameter of 80mm*2m, and the floating hook head 14 lifts the old propeller 1 to the dock and drops it; m, at the same time, the new The propeller 15 is hoisted to the deck of the barge 5 at the rear of the floating dock 4, and the rope loop 12 with a diameter of 80mm*2m is connected to the special lifting ring 13 for the propeller using a shackle; n. The floating hook head 14 is lifted to hoist the new propeller 15 to the lower hook head of the second 100-ton pneumatic hoist 11, and the lower hook head of the second 100-ton pneumatic hoist 11 is connected to the rope loop 12 with a diameter of 80mm*2m, the second 100-ton pneumatic hoist 11 is tightened, and the wire rope connecting the floating hook head 14 and the special lifting ring 13 for the propeller is removed; o. The first 100-ton pneumatic hoist 8. The lower hooks of the first 25-ton electric hoist 9 and the second 25-ton electric hoist 10 are connected to the 80mm*2m diameter rope loop 12 connected to the special ring 13 for the propeller. After the connection is completed, tighten the first 100-ton pneumatic hoist 8 and loosen the second 100-ton pneumatic hoist 11 at the same time. Move the new propeller 15 forward 5.5m and then tighten the two second 25-ton electric hoists 10 at the tail. The two second 25-ton electric hoists 10 cooperate to adjust the new propeller 15 to the end position of the tail shaft 16; p. Continue to loosen the second 100-ton pneumatic hoist 8. The 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 transport the new propeller 15 to the installation position of the tail shaft 16; q. After installing the general cap 6, remove all tools to complete the propeller replacement; the container ship propeller replacement installation method of the present invention effectively solves the problem of using the hoist to replace the propeller when the ship length exceeds the length of the floating dock and the propeller is suspended outside the dock, effectively solving the bottleneck of the pier repair of large ships entering the small dock, and creating more output value. .

Claims

1. A container ship propeller replacement installation method, characterized in that: The following steps are involved: a. The container ship (2) enters the floating dock (4) and docks the barge (5) at the rear of the floating dock (4); b. Install six reverse lifting lugs (7) on the corresponding outer plate above the old propeller (1), and steer the rudder blade (3) to the left to a maximum angle of 30 degrees; c. Install the propeller lifting ring (13) above the hub of the old propeller (1); d. A first 100-ton pneumatic hoist (8) and a second 100-ton pneumatic hoist (11) are respectively hung on two reverse lifting eyes (7), and a first 25-ton electric hoist (9) and a second 25-ton electric hoist (10) are respectively hung on the remaining four reverse lifting eyes (7), and a shackle is used to connect the reverse lifting eyes (7) 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); 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 special lifting ring (13) using a shackle using a rope loop (12); f. Remove the general cap (6) that secures the old propeller (1); g. Operate the first 100-ton pneumatic hoist (8) and the second 100-ton pneumatic hoist (11) directly above the old propeller (1) to apply force, and then operate the first 25-ton electric hoist (9) and the second 25-ton electric hoist (10) to apply force until the old propeller (1) and the tail shaft (16) are relatively loosened; 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. Tighten the two second 25-ton electric hoists (10) at the tail and operate the first 100-ton pneumatic hoist (8) and the second 100-ton pneumatic hoist (11) directly above the old propeller (1) to cooperate with each other to move the old propeller (1) backward and remove the old propeller (1) from the tail shaft (16); j. After the old propeller (1) comes out of the tail shaft (16), operate the two second 25-ton electric hoists (10) at the tail of the old propeller (1), one to tighten and the other to extend, so that the old propeller (1) moves to the left; k. Operate the first 100-ton pneumatic hoist (8) and the second 100-ton pneumatic hoist (11) to cooperate, tighten the second 100-ton pneumatic hoist (11), extend the first 100-ton pneumatic hoist (8), and move the old propeller (1) backwards, so that only the second 100-ton pneumatic hoist (11) at the rear is subjected to force; 1. The steel wire rope of the floating hook head (14) is connected to the shackle of the special lifting ring (13) of the propeller, and the floating hook head (14) is slowly lifted. The second 100-ton pneumatic hoist (11) is not subjected to force, and the lower end hooks 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 loop (12). The floating hook head (14) lifts the old propeller (1) to the dock and drops it; m. At the same time, the new propeller (15) is hoisted onto the deck of the barge (5) at the rear of the floating dock (4), and the rope loop (12) is connected to the special lifting ring (13) for the propeller using a shackle; n. Lift the floating hook head (14) to lift the new propeller (15) to the lower hook head of the second 100-ton pneumatic hoist (11), connect the lower hook head of the second 100-ton pneumatic hoist (11) to the rope ring (12), tighten the second 100-ton pneumatic hoist (11), and remove the wire rope connecting the floating hook head (14) and the special lifting ring (13) for the propeller; o. Connect the hooks at the lower ends of the first 100-ton pneumatic hoist (8), the first 25-ton electric hoist (9) and the second 25-ton electric hoist (10) to the rope loop (12) connected to the propeller special lifting ring (13). After the connection is completed, tighten the first 100-ton pneumatic hoist (8) and loosen the second 100-ton pneumatic hoist (11). After the new propeller (15) is moved forward, tighten the two second 25-ton electric hoists (10) at the rear. The two second 25-ton electric hoists (10) cooperate to adjust the new propeller (15) to the end position 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 transport 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 container ship propeller replacement and installation method according to claim 1, characterized in that: In step a, an 800-ton barge (5) is docked at the rear of the floating dock (4).

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

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

5. A container ship propeller replacement and installation method according to claim 1, characterized in that: In step k, the old propeller (1) is displaced 5.5 m backwards.

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

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