Hull crane and ship
The ship crane design with a limiting mechanism enables simultaneous cargo and lifeboat lifting by allowing the arm to switch positions, ensuring compliance with safety regulations and efficient operation.
Patent Information
- Application Number
- CN202422478122.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-14
- Publication Date
- 2025-07-15
- Estimated Expiration
- 2034-10-14
AI Technical Summary
Existing ship cranes face challenges in simultaneously performing cargo and lifeboat lifting due to the interference of the rest arm limiting the crane's operation during emergencies, preventing the deployment of lifeboats as required by safety regulations.
A ship crane design with a rotating arm and a rest arm equipped with a limiting mechanism allowing the arm to switch between locked and unlocked positions, enabling stable operation during normal conditions and emergency lifeboat deployment.
Ensures the crane can perform both cargo and lifeboat lifting tasks efficiently, meeting safety requirements by allowing the arm to rotate freely during emergencies.
Smart Images
Figure CN223102590U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of hull cranes, and particularly relates to a hull crane and a ship. Background Technique
[0002] Modern ships are constantly being upgraded and developed, with their transport capacity continuously expanding, their structure continuously optimized, and they are developing towards intelligence and greenness. For example, the layout of the hull crane not only reflects the requirements of compactness and practicality, but also takes into account meeting various transportation needs to improve the application range of the crane.
[0003] At present, the lifting equipment on the ship will be used for multiple functions. For example, it is used to lift personnel on and off the ship, lift goods, or part-time lift lifeboats. Specifically, it is a practical and economical practice to use the sundry goods crane on the ship as a lifeboat crane. Among them, the boom of the sundry goods crane is relatively long, and for a boom exceeding 3m, a boom rest arm needs to be set to support and limit the boom to prevent the boom from shaking when the ship is sailing.
[0004] However, according to relevant requirements, the lifeboat needs to be in a state of being ready for use at all times and be lowered to the water surface within a specific time. In the commonly used sundry goods crane, due to the influence of the rest arm limit, in an emergency, the sundry goods crane cannot work, thus affecting the lifting of the lifeboat. Content of the Utility Model
[0005] The purpose of the utility model is to provide a hull crane which can be used as a sundry goods crane and also serve as a lifeboat crane to simplify the lifting equipment of the ship.
[0006] To solve the above technical problems, the utility model adopts the following technical solutions:
[0007] According to one aspect of the present utility model, the present utility model provides a hull crane which is arranged on the deck of a ship for hoisting a lifeboat. The hull crane includes: a boom which is installed on the deck of the ship and can rotate relative to the deck about an axis in the vertical direction; a rest arm which is installed on the deck of the ship; the rest arm extends vertically so that the top end of the rest arm can be used to support the free end of the boom; a limiting assembly which is installed on the top of the rest arm so that after the free end of the boom is placed on the top end of the rest arm, the limiting assembly can abut against the two side walls of the boom in the horizontal direction and limit the rotation of the boom; wherein the limiting assembly includes a fixed member and a movable member; the fixed member is fixed on the top of the rest arm and the top of the fixed member extends upward beyond the top of the rest arm; the movable member is installed on the top of the rest arm and is arranged at an interval with the fixed member; the movable member can move vertically relative to the rest arm so that the movable member can switch between a limiting position and an unlocking position; when the movable member is located at the limiting position, the top of the movable member extends upward beyond the top of the rest arm so that the movable member and the fixed member can respectively abut against the two side walls of the boom; when the movable member is located at the unlocking position, the top of the movable member is lower than the top of the rest arm in the vertical direction so that the movable member is disengaged from abutting against the boom and the boom can rotate towards the side of the movable member.
[0008] In an embodiment of the present application, the limiting assembly further includes a mounting seat; the mounting seat is fixed on the top of the rest arm; the mounting seat is provided with a mounting cylinder which is hollow inside and has openings at both ends; the movable member is inserted into the mounting cylinder so that the movable member can slide vertically relative to the mounting cylinder; wherein when in the limiting position, at least part of the movable member is located inside the mounting cylinder so that the side wall of the mounting cylinder can form a limit for the movable member in the horizontal direction.
[0009] In an embodiment of the present application, the limiting assembly further includes a mounting seat; the mounting seat includes a mounting plate and a resisting top plate; the mounting plate extends in the horizontal direction and fits on the top of the rest arm; the resisting top plate extends vertically and is fixed on the side of the mounting plate in the horizontal direction; the fixed member is fixedly attached to the outer side wall of the resisting top plate.
[0010] In an embodiment of the present application, the limiting assembly further includes an elastic mounting cushion plate; the mounting cushion plate is fixed on the top of the mounting plate to be able to abut against the bottom wall of the boom and buffer the impact of the boom on the mounting seat.
[0011] In an embodiment of the present application, the hull crane further includes a tie rod; the tie rod is connected to the bottom of the movable member to drive the movable member to move.
[0012] In an embodiment of the present application, the hull crane further includes a limit pull ring; the limit pull ring is fixed to the bottom of the tie rod; a limit post protruding horizontally is provided on the outer peripheral side of the rest arm; the limit pull ring can be sleeved on the peripheral side of the limit post so that the tie rod and the movable member are in the limit position.
[0013] In an embodiment of the present application, the hull crane further includes a limit plate; the limit plate is fixed to the outer peripheral side of the rest arm; a vertically penetrating limit hole is provided in the limit plate; the tie rod is inserted into the limit hole so that the tie rod can move vertically.
[0014] In an embodiment of the present application, a fixed backing plate is provided on the side of the fixed member facing the movable member; the fixed backing plate is elastic and can abut against the side wall of the boom to buffer the impact of the boom on the fixed member; a movable backing plate is provided on the side of the movable member facing the fixed member; the movable backing plate is elastic and can abut against the side wall of the boom to buffer the impact of the boom on the movable member.
[0015] In an embodiment of the present application, the hull crane further includes a rotating seat for mounting the boom; the rotating seat and the rest arm are both mounted on the deck and are located on the same ship's side; the horizontal connection line between the rest arm and the rotating seat is parallel to the length direction of the hull.
[0016] The present application also provides a ship, which includes a hull, a lifeboat, and any one of the hull cranes; the lifeboat is placed on the deck of the hull, the hull crane is fixed on the deck of the hull, and the lifeboat and the hull crane are located on the same ship's side; the lifeboat is located between the rest arm and the rotating end of the boom.
[0017] As can be seen from the above technical solutions, the present utility model has at least the following advantages and positive effects:
[0018] In the present utility model, the hull crane includes a boom, a rest arm, and a limit assembly. The boom and the rest arm are both mounted on the deck of the ship. The boom can rotate relative to the deck around a vertical axis. The rest arm extends vertically and can support at the free end of the boom. The limit assembly is mounted on the top of the rest arm, and the limit assembly includes a fixed member and a movable member. Both the fixed member and the movable member can abut against the side wall of the boom to prevent the free end of the boom from moving relative to the rest arm, thereby ensuring the stability of the boom during navigation.
[0019] Meanwhile, the movable member can move vertically relative to the boom, so that the movable member can switch between the limit position and the unlocking position. When the movable member is switching positions, the free end of the boom can move relative to the rest arm, so that the boom can hoist the lifeboat. Thus, in an emergency, the boom can rotate relative to the rest arm and hoist the lifeboat, enabling the boom to serve both as a sundry hoist and a lifeboat hoist, thereby expanding the scope of use of the boom. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 is a partial schematic view of a ship according to an embodiment of the present invention.
[0021] Figure 2 is Figure 1 a cross-sectional view taken at A of
[0022] Figure 3 is Figure 2 an enlarged view of B of
[0023] Figure 4 is a schematic view of the rest arm of the ship and the free end of the boom.
[0024] Figure 5 is Figure 4 an enlarged view of C of
[0025] Figure 6 is a schematic view of the limit assembly.
[0026] Figure 7 is a schematic view of the free end of the boom and the rest arm.
[0027] The reference numerals are explained as follows:
[0028] 1 - deck; 2 - lifeboat; 10 - boom; 11 - free end; 12 - rotating seat; 13 - rotating end; 20 - rest arm; 30 - limit assembly; 31 - fixing member; 32 - movable member; 33 - mounting seat; 40 - pull rod; 41 - limit pull ring; 42 - limit post; 43 - limit plate; 311 - fixing backing plate; 321 - movable backing plate; 331 - mounting cylinder; 332 - mounting plate; 333 - abutting top plate; 334 - mounting backing plate. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0029] Typical embodiments embodying the features and advantages of the present invention will be described in detail in the following description. It should be understood that the present invention can have various changes in different embodiments, all of which do not depart from the scope of the present invention, and the descriptions and illustrations therein are for illustrative purposes in essence and not for limiting the present invention.
[0030] In the description of the present utility model, it should be understood that in the embodiments shown in the drawings, the indication of the direction or positional relationship (such as up, down, left, right, front and back, etc.) is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. When these elements are in the positions shown in the drawings, these descriptions are appropriate. If the description of the positions of these elements changes, then the indication of these directions also changes accordingly.
[0031] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present utility model, "a plurality of" means two or more, unless otherwise specifically defined.
[0032] The lifting equipment on the ship will perform multiple functions. For example, it can lift personnel on and off the ship, lift goods, or part-time lift lifeboats. Specifically, it is a practical and economical practice to use the debris crane on the ship as a lifeboat crane. Among them, the boom of the debris crane is relatively long, and for a boom exceeding 3m, a boom rest arm needs to be set to support and limit the boom to prevent the boom from shaking during ship navigation.
[0033] However, according to relevant requirements, the lifeboat needs to be in a state of being ready for use at all times and be lowered to the water surface within a specific time. Specifically, according to the requirements of SOLAS (i.e., the International Convention for the Safety of Life at Sea), the lifeboat should be continuously in a state of being ready for use, and in case of an emergency, the lifeboat should be lowered to the water surface within 5 minutes.
[0034] In common debris cranes, due to the influence of the rest arm limit, in an emergency, the debris crane cannot rotate, which in turn affects the lifting of the lifeboat. The lifeboat crane is equipped with an accumulator, which can remove the lifeboat outboard in case of power failure of the ship. However, the accumulator can only meet the requirements of the crane rotation and cannot lift the boom of the crane, so that the debris crane cannot be compatible with the lifeboat crane. Therefore, a hull crane is proposed to solve the above problems.
[0035] The solution is further illustrated by the following embodiments:
[0036] Figure 1 It is a partial schematic diagram of the ship in the embodiment of the present utility model.
[0037] Please refer to Figure 1, the ship of this embodiment may include a hull 3, a lifeboat 2, and a hull crane. Among them, the lifeboat 2 can be placed on the deck 1 of the hull 3, and the hull crane can be fixed on the deck 1 of the hull 3. At the same time, the lifeboat 2 and the hull crane can be located on the same ship's side and close to the ship's side, so as to facilitate the hull crane to hoist the lifeboat 2 onto the water surface and also facilitate the hull crane to hoist sundries.
[0038] Figure 2 is Figure 1 The cross-sectional view at position A of Figure 3 is Figure 2 The enlarged view at position A of
[0039] Refer to Figure 1 , the hull crane may include a boom 10, a swivel base 12, a rest arm 20, and a limit component 30.
[0040] Among them, the boom 10 can be installed on the deck 1 of the ship and can rotate relative to the deck 1 about an axis in the vertical direction. At the same time, the swivel base 12 can also be installed on the deck 1, and the swivel base 12 is used to install the rotating end 13 of the boom 10. Specifically, the boom 10 is installed on the deck 1 of the hull 3 through the swivel base 12, so that the boom 10 can rotate relative to the deck 1.
[0041] In this embodiment, the hull crane may also be provided with a rotation drive assembly. Among them, the rotation drive assembly is used to drive the boom 10 to rotate relative to the deck 1. Specifically, the rotation drive assembly can be set as an accumulator, and the accumulator can drive the boom 10 to rotate by releasing the stored potential energy.
[0042] In some other embodiments, the rotation drive assembly can be set as motor drive, and the motor can be provided with a separate power source so that after the ship loses power due to an unexpected situation, the rotation drive assembly can still drive the boom 10 to rotate.
[0043] Of course, in an unexpected situation, the boom 10 can also be rotated manually so that the boom 10 can rotate relative to the deck 1.
[0044] Refer to Figure 1 , the rest arm 20 can be installed on the deck 1 of the ship. Specifically, the rest arm 20 and the swivel base 12 are located on the same ship's side, that is, the horizontal connection line between the rest arm 20 and the swivel base 12 is parallel to the length direction of the hull. At the same time, the lifeboat 2 is located between the rest arm 20 and the swivel base 12, that is, the lifeboat 2 is located between the rest arm 20 and the rotating end 13 of the boom 10, so as to optimize the layout of the deck 1 and facilitate the boom 10 to lift the lifeboat 2.
[0045] In this embodiment, the rest arm 20 extends vertically so that the top end of the rest arm 20 can be used to support the free end 11 of the lifting arm 10.
[0046] Referring to Figure 2 and Figure 3 , the limiting component 30 can be installed on the top of the rest arm 20. After the free end 11 of the lifting arm 10 is placed on the top end of the rest arm 20, the limiting component 30 can abut against the two side walls of the lifting arm 10 in the horizontal direction and limit the rotation of the lifting arm 10, thereby preventing the free end 11 of the lifting arm 10 from shaking during the ship's voyage.
[0047] Specifically, the limiting component 30 can include a fixing member 31 and a movable member 32. The fixing member 31 can be fixed on the top of the rest arm 20, and the top of the fixing member 31 extends upward beyond the top of the rest arm 20 so that the fixing member 31 can abut against the side wall of the free end 11. The movable member 32 is installed on the top of the rest arm 20 and is spaced apart from the fixing member 31, so that the fixing member 31 and the movable member 32 can be respectively arranged on the opposite sides of the free end 11. In this embodiment, the fixing member 31 and the movable member 32 are spaced apart in the transverse direction of the hull 3, so that the fixing member 31 and the movable member 32 can respectively abut against the two side walls of the free end 11 in the transverse direction.
[0048] Figure 4 is a schematic diagram of the rest arm of the ship and the free end of the lifting arm. Figure 5 is Figure 4 an enlarged view of part C of
[0049] Referring to Figure 3 , Figure 4 and Figure 5 , the movable member 32 can move relative to the rest arm 20 vertically so that the movable member 32 can switch between the limiting position and the unlocking position.
[0050] Specifically, when the movable member 32 is in the limiting position, the top of the movable member 32 extends upward beyond the top of the rest arm 20, so that the movable member 32 and the fixing member 31 can respectively abut against the two side walls of the lifting arm 10, as shown in Figure 3 .
[0051] When the movable member 32 is in the unlocking position, the top of the movable member 32 is lower than the top of the rest arm 20 vertically, or the top of the movable member 32 is flush with the top of the rest arm 20 vertically, so that the movable member 32 is disengaged from abutting against the lifting arm 10 and the lifting arm 10 can rotate toward the side of the movable member 32.
[0052] It should be noted that after the free end 11 of the boom 10 is disengaged from the abutting against the movable member 32, the boom 10 can rotate relative to the deck 1, so that the free end 11 can drive the lifeboat 2 to move, and then lift and place the lifeboat 2 on the water surface.
[0053] Figure 6 It is a schematic diagram of the limiting component.
[0054] Refer to Figure 5 and Figure 6 As shown in FIGS. and, the limiting component 30 may further include a mounting base 33. The mounting base 33 is fixed to the top of the rest arm 20 for mounting the fixing member 31 and the movable member 32. Specifically, the mounting base 33 is provided with a mounting cylinder 331 that is hollow inside and open at both ends. The movable member 32 is inserted into the mounting cylinder 331 so that the movable member 32 can slide relatively in the vertical direction, and thus the movable member 32 can be switched between the limiting position and the unlocking position.
[0055] It should be noted that in the limiting position, at least a part of the movable member 32 is located inside the mounting cylinder 331, so that the side wall of the mounting cylinder 331 can form a limit on the movable member 32 in the horizontal direction, thereby ensuring that the movable member 32 can firmly abut against the side wall of the free end 11.
[0056] Refer to Figure 5 As shown in FIG., the mounting base 33 may include a mounting plate 332 and an abutting top plate 333. Among them, the mounting plate 332 extends in the horizontal direction and fits on the top of the rest arm 20, so that the mounting base 33 can be fixed to the top of the rest arm 20. The abutting top plate 333 extends in the vertical direction and is fixed to the side of the mounting plate 332 in the horizontal direction. In this embodiment, the fixing member 31 is fixedly attached to the outer side wall of the abutting top plate 333.
[0057] In some other embodiments, the fixing member 31 and the abutting top plate 333 may be integrated, so that the fixing member 31 can be connected to the mounting base 33 and can abut against the side wall of the free end 11.
[0058] In addition, it should be noted that the abutting top plate 333 and the mounting cylinder 331 are respectively arranged on the two transverse sides of the mounting base 33, and the mounting cylinder 331 is located on the side of the mounting base 33 close to the ship's side. When the movable member 32 is in the unlocking position, the free end 11 can rotate towards the direction of the ship's side, so that the free end 11 of the boom 10 can drive the lifeboat 2 to be lifted and placed on the water surface.
[0059] Refer to Figure 6 As shown in FIG., the limiting component 30 may further include a mounting cushion plate 334. Specifically, the mounting cushion plate 334 has elasticity, and the mounting cushion plate 334 is fixed to the top of the mounting plate 332 to be able to abut against the bottom wall of the boom 10 and buffer the impact of the boom 10 on the mounting base 33.
[0060] Meanwhile, a fixed backing plate 311 is provided on one side of the fixing member 31 facing the movable member 32, and the fixed backing plate 311 is elastic and can abut against the side wall of the boom 10 to buffer the impact of the boom 10 on the fixing member 31. A movable backing plate 321 is provided on one side of the movable member 32 facing the fixing member 31, and the movable backing plate 321 is elastic and can abut against the side wall of the boom 10 to buffer the impact of the boom 10 on the movable member 32.
[0061] Figure 7 It is a schematic diagram of the free end of the boom and the rest arm.
[0062] Refer to Figure 2 and Figure 7 The hull crane may further include a tie rod 40. Wherein, the tie rod 40 is connected to the bottom of the movable member 32 to drive the movable member 32 to move. Since the height distance between the top of the rest arm 20 and the deck 1 is relatively large, and the limiting assembly 30 is provided at the top of the rest arm 20, driving the movable member 32 to move through the tie rod 40 can facilitate the operator to operate the movable member 32.
[0063] In addition, the hull crane may further include a limit pull ring 41, a limit post 42 and a limit plate 43. Specifically, the limit pull ring 41 is fixed to the bottom of the tie rod 40, the limit post 42 is installed on the outer peripheral side of the rest arm 20 and protrudes in the horizontal direction so that the limit pull ring 41 can be sleeved on the periphery of the limit post 42, thereby limiting the tie rod 40 and the movable member 32 in the limit position and preventing the movable member 32 from sliding to the unlocking position during the ship's voyage.
[0064] Meanwhile, the limit plate 43 is fixed to the outer peripheral side of the rest arm 20, and a vertically penetrating limit hole is formed in the limit plate 43, and the tie rod 40 is inserted into the limit hole so that the tie rod 40 can move vertically. Specifically, a plurality of limit plates 43 are provided, and the tie rod 40 is inserted into the limit holes of the plurality of limit plates 43 to limit the tie rod 40 so that the tie rod 40 can move in a specific direction.
[0065] In summary, the limiting assembly 30 is installed at the top of the rest arm 20, and the fixing member 31 and the movable member 32 can abut against the free end 11 of the boom 10 to limit the free end 11. Meanwhile, the movable member 32 can move vertically relative to the rest arm 20, so that the movable member 32 can be switched between the limit position and the unlocking position, so that the free end 11 of the boom 10 can still rotate relative to the deck 1 in case of an emergency, and then the free end 11 drives the lifeboat 2 to be lowered into the water. Therefore, the hull crane of this embodiment can serve as both a sundry crane and a lifeboat crane.
[0066] While the present utility model has been described with reference to several exemplary embodiments, it should be understood that the terms used are illustrative and exemplary rather than restrictive. Since the present utility model can be embodied in many forms without departing from the spirit or essence of the utility model, it should be understood that the above-described embodiments are not limited to any of the foregoing details, but should be broadly construed within the spirit and scope defined by the appended claims. Therefore, all changes and modifications falling within the scope of the claims or their equivalents should be covered by the appended claims.
Claims
1. A hull crane is provided on the deck of a ship for hoisting a lifeboat, characterized in that, The hull crane includes: A boom, which is installed on the deck of the ship and can rotate relative to the deck around an axis in the vertical direction; A rest arm, which is installed on the deck of the ship; the rest arm extends vertically so that the top end of the rest arm can be used to support the free end of the boom; A limiting component, which is installed on the top of the rest arm. After the free end of the boom is placed on the top end of the rest arm, the limiting component can abut against the two side walls of the boom in the horizontal direction and limit the rotation of the boom; Wherein, the limiting component includes a fixed part and a movable part; the fixed part is fixed on the top of the rest arm, and the top of the fixed part extends upward beyond the top of the rest arm; the movable part is installed on the top of the rest arm and is arranged at an interval from the fixed part; the movable part can move vertically relative to the rest arm so that the movable part can switch between a limiting position and an unlocking position; When the movable part is in the limiting position, the top of the movable part extends upward beyond the top of the rest arm so that the movable part and the fixed part can respectively abut against the two side walls of the boom; When the movable part is in the unlocking position, the top of the movable part is lower than the top of the rest arm in the vertical direction so that the movable part is disengaged from abutting against the boom and the boom can rotate towards the side of the movable part.
2. The hull crane according to claim 1, characterized in that, The limiting component further includes a mounting seat; the mounting seat is fixed on the top of the rest arm; the mounting seat is provided with a mounting cylinder with a hollow interior and two open ends; the movable part is inserted into the mounting cylinder so that the movable part can slide vertically relative to the rest arm; Wherein, in the limiting position, at least a part of the movable part is located inside the mounting cylinder so that the side wall of the mounting cylinder can form a limit for the movable part in the horizontal direction.
3. The hull crane according to claim 1, characterized in that, The limiting component further includes a mounting seat; the mounting seat includes a mounting plate and an abutting top plate; the mounting plate extends in the horizontal direction and fits on the top of the rest arm; the abutting top plate extends vertically and is fixed on the side of the mounting plate in the horizontal direction; The fixed part is fixedly attached to the outer side wall of the abutting top plate.
4. The hull crane according to claim 3, characterized in that, The limiting component further includes an elastic mounting cushion plate; the mounting cushion plate is fixed on the top of the mounting plate to be able to abut against the bottom wall of the boom and buffer the impact of the boom on the mounting seat.
5. The hull crane according to claim 1, wherein, It further includes a pull rod; the pull rod is connected to the bottom of the movable part to drive the movable part to move.
6. The hull crane according to claim 5, wherein, It further includes a limiting pull ring; the limiting pull ring is fixed to the bottom of the pull rod; a limiting column protruding in the horizontal direction is arranged on the outer peripheral side of the rest arm; the limiting pull ring can be sleeved on the periphery of the limiting column so that the pull rod and the movable part are in the limiting position.
7. The hull crane according to claim 6, characterized in that, It further includes a limiting plate; the limiting plate is fixed on the outer peripheral side of the rest arm; a limiting hole penetrating vertically is formed in the limiting plate; the pull rod is inserted into the limiting hole so that the pull rod can move vertically.
8. The hull crane according to claim 1, wherein A fixing pad is provided on one side of the fixing member facing the movable member; the fixing pad is elastic and can abut against the side wall of the boom to buffer the impact of the boom on the fixing member; a movable pad is provided on one side of the movable member facing the fixing member; the movable pad is elastic and can abut against the side wall of the boom to buffer the impact of the boom on the movable member.
9. The hull crane according to claim 1, characterized in that, It further includes a rotating seat for installing the boom; both the rotating seat and the rest arm are installed on the deck and are located on the same ship's side; the connection line between the rest arm and the rotating seat in the horizontal direction is parallel to the length direction of the hull.
10. A ship, characterized in that, The ship includes a hull, a lifeboat, and the hull crane according to any one of claims 1-9; the lifeboat is placed on the deck of the hull, the hull crane is fixed on the deck of the hull, and the lifeboat and the hull crane are located on the same ship's side; The lifeboat is located between the rest arm and the rotating end of the boom.