Ship crane cylinder hoisting assembly method and hoisting tool

Abstract

The invention belongs to the technical field of ships, and discloses a ship crane cylinder hoisting assembly method and a hoisting tool. The ship crane barrel hoisting and assembling method comprises the steps that a first lifting hook set is controlled to be connected to the periphery of a first barrel section in a hooked mode; a second lifting hook group is controlled to be hooked at one end, far away from the first barrel section, of the second barrel section; the upper trolley and the lower trolley are controlled to enable the crane cylinder to be suspended; the lower trolley is controlled to enable the second lifting hook set to move upwards in the vertical direction, and the upper trolley is controlled to enable the first lifting hook set to move downwards in the vertical direction till the first lifting hook set is separated from the first barrel section; and the lower trolley is controlled to butt the first barrel section to the rotating side of the ship body. According to the ship crane cylinder hoisting and assembling method, the crane cylinder is hoisted to the rotating side of the ship body, the hoisting efficiency can be effectively improved, the number of hoisting rings arranged on the periphery of the crane cylinder can be effectively reduced, and the hoisting cost can be effectively reduced.

Description

Technical Field

[0001] The invention relates to the technical field of ships, and in particular to a method for hoisting and assembling a ship crane barrel and a hoisting tool. Background Art

[0002] A crane, also known as a ship crane, is a deck mechanical equipment for loading and unloading cargo on a ship. It has the characteristics of large lifting capacity, easy operation, impact resistance, good mechanical kinetic energy, and high efficiency in loading and unloading cargo. Among them, the crane cylinder is a supporting base that supports the crane at a certain height above the deck of the ship to ensure that the crane can lift the cargo on the deck of the ship well.

[0003] At present, in the prior art, when the crane cylinder is hoisted and assembled on the side of the hull, two first lifting ring groups are usually set in the middle area of ​​the crane cylinder along the axial direction, and the two first lifting ring groups are set back to each other, and a second lifting ring group is set in the bottom area of ​​the crane cylinder along the axial direction. Two of the hook groups of the gantry crane are respectively connected to one of the first lifting ring groups and the second lifting ring group in a one-to-one correspondence, and the crane cylinder is moved horizontally to above the expected assembly position. Then, the hook group connected to the second lifting ring group is loosened, and the remaining hook group of the gantry crane is connected to the other first lifting ring group, so that the crane cylinder is vertically distributed above the expected assembly position. Then, the crane cylinder is moved vertically downward to the expected assembly position and assembled on the side of the hull. However, when this lifting and assembly method is used to lift and assemble the crane barrel to the side of the hull, it is difficult to loosen the hook group connected to the second lifting ring group and to connect the remaining hook group to the other first lifting ring group, resulting in low lifting efficiency; secondly, a large number of lifting ring groups need to be set on the outer circumference of the crane barrel. Summary of the invention

[0004] The object of the present invention is to provide a method and a lifting tool for lifting and assembling a ship crane cylinder, so as to solve the above-mentioned problems existing in the prior art when lifting and assembling a ship crane cylinder on the side of a hull.

[0005] To achieve this object, the present invention adopts the following technical solutions:

[0006] A method for hoisting and assembling a ship crane cylinder, wherein the hoisting tool comprises a gantry crane and a crane cylinder, wherein the gantry crane comprises an upper trolley and a lower trolley, wherein the upper trolley is provided with a first hook group, and the lower trolley is provided with a second hook group; wherein the crane cylinder comprises a first cylinder section and a second cylinder section connected in an axial direction, wherein the first cylinder section is used to be connected to a rotating side of a ship hull;

[0007] The ship crane barrel hoisting and assembling method comprises:

[0008] Controlling the first hook assembly to hook onto the outer periphery of the first cylinder section;

[0009] Controlling the second hook assembly to hook onto an end of the second cylinder section away from the first cylinder section;

[0010] Manipulate the upper trolley and the lower trolley to make the crane body suspended in the air;

[0011] The lower trolley is operated to make the second hook group move up in the vertical direction, and the upper trolley is operated to make the first hook group move down in the vertical direction until the first hook group is separated from the first cylinder section;

[0012] The lower trolley is operated to dock the first cylinder section with the rotating side of the hull.

[0013] As a preferred solution of the above-mentioned method for hoisting and assembling the ship crane barrel, when the crane barrel is suspended in the air, the minimum suspended height of the crane barrel in the vertical direction is greater than the axial length of the crane barrel.

[0014] The lifting tool comprises a gantry crane and a crane cylinder, the gantry crane comprises an upper trolley and a lower trolley, the upper trolley is provided with a first hook group, and the lower trolley is provided with a second hook group; the crane cylinder comprises a first cylinder section and a second cylinder section connected along the axial direction, the first cylinder section is used to connect to the rotating side of the hull; the crane cylinder is docked to the rotating side of the hull by adopting the above-mentioned ship crane cylinder lifting and assembly method.

[0015] As a preferred solution of the above-mentioned lifting tool, a first lifting ring group is provided on the outer periphery of the first cylinder section, and the first lifting ring of the first lifting ring group is used for hooking with the first lifting hook of the first lifting hook group.

[0016] As a preferred solution of the above-mentioned lifting tooling, a second lifting ring group is provided on the end of the second cylinder section away from the first cylinder section, and the second lifting ring of the second lifting ring group extends out of the end surface of the second cylinder section and is used to hook with the second lifting hook of the second lifting hook group.

[0017] As a preferred solution of the above-mentioned lifting tooling, the number of the second lifting ring groups and the second lifting hook groups are both two, and the two second lifting ring groups and the two second lifting hook groups are arranged in one-to-one correspondence; when the axial direction of the crane cylinder is parallel to the horizontal plane, the two second lifting ring groups are spaced apart in the vertical direction.

[0018] As a preferred solution of the above-mentioned lifting tooling, a first reinforcement member is provided on one or both sides of the second lifting ring along the thickness direction, one end of the first reinforcement member is fixedly connected to the second lifting ring, and the other end of the first reinforcement member is fixedly connected to the inner circumferential wall of the second cylinder section.

[0019] As a preferred solution of the above-mentioned lifting tooling, the crane barrel further includes a second reinforcement member, and the second reinforcement member is fixedly connected between the two second lifting ring groups.

[0020] As a preferred solution of the above-mentioned lifting tooling, a positioning structure is provided at one end of the first cylinder section away from the second cylinder section, and the positioning structure is used to locate the relative position of the first cylinder section and the rotating side of the hull.

[0021] As a preferred solution of the above-mentioned lifting tool, a climbing ladder is fixedly provided in the crane barrel, and the climbing ladder extends along the axial direction of the crane barrel.

[0022] Beneficial effects of the present invention:

[0023] The invention discloses a method for hoisting and assembling a ship crane cylinder and a hoisting tool. The method comprises: operating a first hook group to hook the outer periphery of a first cylinder section; operating a second hook group to hook an end of the second cylinder section away from the first cylinder section; operating an upper trolley and a lower trolley to suspend the crane cylinder; operating the lower trolley to move the second hook group up vertically, and operating the upper trolley to move the first hook group down vertically until the first hook group is separated from the first cylinder section; and operating the lower trolley to dock the first cylinder section with the rotating side of the ship body.

[0024] By adopting the ship crane barrel hoisting and assembly method to hoist the crane barrel on the rotating side of the hull, the hoisting efficiency can be effectively improved, the number of hoisting rings set on the outer periphery of the crane barrel can be effectively reduced, and the hoisting cost can be effectively reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 The structure of the lifting tool provided by the specific embodiment of the present invention is schematically shown. Figure 1 ;

[0026] Figure 2 The structure of the lifting tool provided by the specific embodiment of the present invention is schematically shown. Figure 2 ;

[0027] Figure 3 The structure of the lifting tool provided by the specific embodiment of the present invention is schematically shown. Figure 3 ;

[0028] Figure 4 yes Figure 1 Partial view at A;

[0029] Figure 5 is a top view of the top of a crane cylinder provided by a specific embodiment of the present invention;

[0030] Figure 6is a cross-sectional view of a crane barrel provided by a specific embodiment of the present invention;

[0031] Figure 7 yes Figure 6 A partial view at B;

[0032] Figure 8 The present invention is a flowchart of a method for hoisting and assembling a ship crane barrel provided by a specific embodiment of the present invention.

[0033] In the figure:

[0034] 100. The hull rotates sideways;

[0035] 1. Gantry crane; 11. Upper trolley; 111. First hook group; 12. Lower trolley; 121. Second hook group;

[0036] 2. Crane cylinder; 21. First cylinder section; 22. Second cylinder section; 23. First lifting ring; 24. Second lifting ring group; 241. Second lifting ring; 25. First reinforcement member; 26. Second reinforcement member; 27. Climbing ladder. DETAILED DESCRIPTION

[0037] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0038] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0040] In the description of this embodiment, the terms "upper", "lower", "right", etc., directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0041] The present invention provides a lifting tool. Figure 1-3 As shown, the lifting tool comprises a gantry crane 1 and a crane barrel 2. The gantry crane 1 comprises an upper trolley 11 and a lower trolley 12, and the upper trolley 11 is provided with a first hook group 111. The lower trolley 12 is provided with a second hook group 121. The crane barrel 2 comprises a first barrel section 21 and a second barrel section 22 connected in the axial direction, and the first barrel section 21 is used to connect with the rotating side 100 of the hull.

[0042] Specifically, Figure 6 As shown, a first lifting ring group is provided on the outer periphery of the first cylinder section 21, and the first lifting ring 23 of the first lifting ring group is used to hook with the first hook of the first hook group 111. When the crane cylinder 2 is to be hoisted, the first hook is hooked with the corresponding first lifting ring 23.

[0043] Preferably, the first lifting ring group includes a plurality of first lifting rings 23. The first lifting hook group 111 includes a plurality of first lifting hooks, and the plurality of first lifting rings 23 are arranged in a one-to-one correspondence with the plurality of first lifting hooks, so as to improve the reliability of lifting the crane barrel 2.

[0044] Specifically, Figure 4 , Figure 5 and Figure 7 As shown, a second lifting ring group 24 is provided at one end of the second barrel section 22 away from the first barrel section 21, and a second lifting ring 241 of the second lifting ring group 24 extends out of the end surface of the second barrel section 22 and is used to hook with the second hook of the second hook group 121. When the crane barrel 2 is to be hoisted, the second hook is hooked with the second lifting ring 241.

[0045] Preferably, if Figure 4 , Figure 5 and Figure 7 As shown, the second lifting ring group 24 includes a plurality of second lifting rings 241. The second lifting hook group 121 includes a plurality of second lifting hooks, and the plurality of second lifting rings 241 are arranged in a one-to-one correspondence with the plurality of second lifting hooks, so as to further improve the reliability of the lifting crane barrel 2.

[0046] Preferably, if Figure 4 , Figure 5 and Figure 7As shown, the number of the second lifting ring group 24 and the second lifting hook group 121 are both two, and the two second lifting ring groups 24 and the two second lifting hook groups 121 are arranged one by one; when the axial direction of the crane barrel 2 is parallel to the horizontal plane, the two second lifting ring groups 24 are spaced apart in the vertical direction, so as to further improve the reliability of lifting the crane barrel 2.

[0047] Alternatively, if Figure 4 , Figure 5 and Figure 7 As shown, the second lifting ring 241 is provided with a first reinforcement member 25 on one or both sides along the thickness direction. One end of the first reinforcement member 25 is fixedly connected to the second lifting ring 241, and the other end of the first reinforcement member 25 is fixedly connected to the inner circumferential wall of the second barrel section 22, so as to improve the reliability of connecting the second lifting ring 241 to the inner circumferential wall of the second barrel section 22.

[0048] Preferably, in this embodiment, if Figure 5 As shown, first reinforcement members 25 are provided on both sides of the second suspension ring 241 along the thickness direction.

[0049] In this embodiment, the second lifting ring 241 is welded to the inner peripheral wall of the second barrel section 22. As an alternative, the second lifting ring 241 can also be connected to the second barrel section 22 by threaded connection.

[0050] In this embodiment, one end of the first reinforcement member 25 is welded to the second lifting ring 241, and the other end is connected to the inner circumferential wall of the second barrel section 22. As an alternative, the first reinforcement member 25 can also be connected to the second lifting ring 241 and the second barrel section 22 by threaded connection.

[0051] Preferably, in this embodiment, if Figure 5 As shown, the second lifting ring 241 is a plate-shaped lifting ring. The first reinforcement member 25 is a reinforcement plate. This is to improve the lightweight effect of the crane barrel 2. It is also convenient to subsequently remove the second lifting ring 241 and assemble the crane on the second barrel section 22.

[0052] Specifically, in this embodiment, before assembling the crane on the second barrel segment 22, at least the portion of the second lifting ring 241 extending out of the end surface of the second barrel segment 22 is cut and detached. As an alternative, for connecting the second lifting ring 241 to the second barrel segment 22 by threaded connection, before assembling the crane on the second barrel segment 22, the second lifting ring 241 can be directly detached from the second barrel segment 22.

[0053] Alternatively, if Figure 4 , Figure 5 and Figure 7As shown, the crane body 2 also includes a second reinforcement member 26, which is fixedly connected between the two second lifting ring groups 24 along the circumference of the second barrel section 22. This further improves the reliability of connecting the second lifting ring 241 to the inner circumferential wall of the second barrel section 22, and can improve the structural strength of the second barrel section 22.

[0054] In this embodiment, if Figure 4 and Figure 5 As shown, each second lifting ring group 24 is exemplarily arranged to include two second lifting rings 241. That is, the total number of second lifting rings 241 is four. The four second lifting rings 241 are distributed at intervals along the circumference of the second barrel section 22. Preferably, the four second lifting rings 241 are evenly distributed at intervals along the circumference of the second barrel section 22.

[0055] In this embodiment, if Figure 4 and Figure 5 As shown, the second reinforcement member 26 is a reinforcement beam. The number of the second reinforcement members 26 is two. The two second reinforcement members 26 are arranged in a one-to-one correspondence with the two second lifting rings 241 of each second lifting ring group 24. The two ends of the second reinforcement member 26 are respectively fixedly connected to the corresponding second lifting rings 241 in the two second lifting ring groups 24. As an alternative, the second reinforcement member 26 is a reinforcement frame, and the four second lifting rings 241 are respectively fixedly connected to the four corners of the reinforcement frame.

[0056] In this embodiment, both ends of the second reinforcement member 26 are respectively welded to the corresponding second lifting rings 241 in the two second lifting ring groups 24. As an alternative, both ends of the second reinforcement member 26 can also be connected to the corresponding second lifting rings 241 in the two second lifting ring groups 24 by threaded connection.

[0057] Among them, a positioning structure is provided at one end of the first cylinder section 21 away from the second cylinder section 22, and the positioning structure is used to locate the relative position of the first cylinder section 21 and the hull rotating side 100, so as to improve the efficiency of docking the first cylinder section 21 with the hull rotating side 100, thereby further improving the lifting efficiency.

[0058] Specifically, the positioning structure is a positioning groove, and the rotating side 100 of the hull is provided with a positioning column, which is inserted into the positioning groove for positioning. As an alternative, the positioning structure is a positioning column, and the rotating side 100 of the hull is provided with a positioning groove, and the positioning column is inserted into the positioning groove for positioning.

[0059] Among them, Figure 6 As shown, a climbing ladder 27 is fixedly arranged in the crane cylinder 2, and the climbing ladder 27 extends along the axial direction of the crane cylinder 2. It is convenient for operators to climb to the top of the crane cylinder 2 to connect the crane to the crane cylinder 2, and it is convenient for subsequent operators to climb to the crane.

[0060] Among them, the specific structure of the gantry crane 1 belongs to the existing technology and will not be repeated here.

[0061] The present invention also provides a method for hoisting and assembling a ship crane barrel, which is used to be implemented in the above-mentioned hoisting tool. By adopting the method for hoisting and assembling a ship crane barrel, the crane barrel 2 is hoisted on the rotating side 100 of the hull, which can effectively improve the hoisting efficiency, effectively reduce the number of hoisting rings provided on the outer peripheral wall of the crane barrel 2, and effectively reduce the hoisting cost.

[0062] like Figure 8 As shown, the method for hoisting and assembling the ship crane barrel includes:

[0063] S100, the first hook assembly 111 is controlled to be hooked to the outer periphery of the first cylinder section 21. That is, the first hook is controlled to be hooked to the first lifting ring 23.

[0064] S200, the second hook assembly 121 is operated to be hooked to the end of the second cylinder section 22 away from the first cylinder section 21. That is, the second hook is operated to be hooked to the second lifting ring 241.

[0065] Step S100 and step S200 may be performed simultaneously, sequentially, or firstly, and then step S100.

[0066] S300, operate the upper trolley 11 and the lower trolley 12 to make the crane barrel 2 suspended in the air.

[0067] Specifically, the upper trolley 11 is operated to move the first hook upward in the vertical direction, and the lower trolley 12 is operated to move the second hook upward in the vertical direction, thereby driving the suspension barrel 2 to be suspended in the vertical direction.

[0068] S400, operating the lower trolley 12 to move the second hook group 121 upward in the vertical direction, and operating the upper trolley 11 to move the first hook group 111 downward in the vertical direction until the first hook group 111 is separated from the first cylinder section 21.

[0069] Manipulate the second hook group 121 to move up in the vertical direction so that the top of the crane barrel 2 moves upward in the vertical direction. Manipulate the first hook group 111 to move down in the vertical direction so that the bottom of the crane barrel 2 moves downward in the vertical direction. When the axial direction of the crane barrel 2 is perpendicular to the horizontal plane, the second barrel section 22 of the crane barrel 2 is located directly above the first barrel section 21. Continue to manipulate the first hook group 111 to move down in the vertical direction, and manipulate the second hook group 121 to move up in the vertical direction, so that the first hook group 111 can be automatically separated from the first barrel section 21. Compared with the prior art, the difficulty of the first hook group 111 to separate from the first barrel section 21 is effectively reduced, and no manual operation is required. Secondly, compared with the prior art, the crane barrel 2 can be hoisted at one time in a state where the axial direction of the crane barrel 2 is perpendicular to the horizontal plane, which effectively improves the hoisting efficiency.

[0070] S500, controlling the lower trolley 12 to dock the first cylinder section 21 with the rotating side 100 of the hull.

[0071] Specifically, the lower trolley 12 is operated to make the crane barrel 2 move horizontally to the position directly above the pre-assembly position of the rotating side 100 of the ship hull. The lower trolley 12 is operated to make the crane barrel 2 move downward in the vertical direction until the first barrel section 21 is docked with the rotating side 100 of the ship hull, so as to complete the installation of the crane barrel 2.

[0072] Therefore, by adopting the ship crane cylinder hoisting and assembly method to hoist the crane cylinder 2 to the rotating side 100 of the hull, the hoisting efficiency can be effectively improved, the number of hoisting rings set on the outer periphery of the crane cylinder 2 can be effectively reduced, and the hoisting cost can be effectively reduced.

[0073] Preferably, in step S300, when the crane barrel 2 is suspended in the air, the minimum suspension height of the crane barrel 2 in the vertical direction is greater than the axial length of the crane barrel 2. This ensures that when the axial direction of the crane barrel 2 is perpendicular to the horizontal plane, the crane barrel 2 does not contact the horizontal plane, thereby effectively avoiding scratches or even damage to the crane barrel 2.

[0074] Preferably, when executing step S200, each second lifting ring 241 of the two second lifting ring groups 24 is hooked with each second lifting hook of the two second lifting hook groups 121 in a one-to-one correspondence. In this way, when the crane barrel 2 is suspended in the air in step S300, the second lifting ring group 24 located at the upper side in the vertical direction of the two second lifting ring groups 24 is not subjected to the lifting force. When the axial direction of the crane barrel 2 is perpendicular to the horizontal plane in S400, both second lifting ring groups 24 are subjected to force, so as to improve the reliability, safety and stability when the lower trolley 12 is lifting the crane barrel 2 alone.

[0075] Specifically, after the crane barrel 2 and the hull rotating side 100 are assembled, the two second hook groups 121 are controlled to move downward in the vertical direction until each second hook of the two second hook groups 121 is separated from the corresponding second lifting ring 241. After each second hook of the two second hook groups 121 is separated from the corresponding second lifting ring 241, the portion of the second lifting ring 241 that at least extends out of the end surface of the second barrel section 22 is cut and detached, so as to facilitate the assembly of the crane on the top of the crane barrel 2.

[0076] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A method for hoisting and assembling a ship crane cylinder, wherein the hoisting tool comprises a gantry crane (1) and a crane cylinder (2), wherein the gantry crane (1) comprises an upper trolley (11) and a lower trolley (12), wherein the upper trolley (11) is provided with a first hook group (111), and the lower trolley (12) is provided with a second hook group (121); wherein: The crane cylinder (2) comprises a first cylinder section (21) and a second cylinder section (22) connected in the axial direction, wherein the first cylinder section (21) is used to be connected to the rotating side (100) of the hull; The ship crane cylinder hoisting and assembling method comprises: Controlling the first hook group (111) to hook onto the outer periphery of the first cylinder section (21); Controlling the second hook group (121) to hook onto an end of the second cylinder section (22) away from the first cylinder section (21); Manipulating the upper trolley (11) and the lower trolley (12) so that the crane barrel (2) is suspended in the air; The lower trolley (12) is controlled to make the second hook group (121) move up in the vertical direction, and the upper trolley (11) is controlled to make the first hook group (111) move down in the vertical direction until the first hook group (111) is separated from the first cylinder section (21); The lower trolley (12) is manipulated to dock the first cylinder section (21) with the rotating side (100) of the hull.

2. The method for hoisting and assembling a ship crane cylinder according to claim 1, characterized in that: When the crane barrel (2) is suspended in the air, the minimum suspended height of the crane barrel (2) in the vertical direction is greater than the axial length of the crane barrel (2).

3. A lifting tool, comprising a gantry crane (1) and a crane cylinder (2), wherein the gantry crane (1) comprises an upper trolley (11) and a lower trolley (12), wherein the upper trolley (11) is provided with a first hook group (111), and the lower trolley (12) is provided with a second hook group (121); characterized in that: The crane cylinder (2) comprises a first cylinder section (21) and a second cylinder section (22) connected in the axial direction, wherein the first cylinder section (21) is used to be connected to the rotating side (100) of the hull; the crane cylinder (2) is docked to the rotating side (100) of the hull by using the ship crane cylinder hoisting and assembly method according to any one of claims 1 to 2.

4. The lifting tool according to claim 3, characterized in that: A first lifting ring group is provided on the outer periphery of the first cylinder section (21), and a first lifting ring (23) of the first lifting ring group is used for hooking with a first lifting hook of the first lifting hook group (111).

5. The lifting tool according to claim 3, characterized in that: A second lifting ring group (24) is provided on the end of the second cylinder section (22) away from the first cylinder section (21); a second lifting ring (241) of the second lifting ring group (24) extends out of the end surface of the second cylinder section (22) and is used to be hooked with the second lifting hook of the second lifting hook group (121).

6. The lifting tool according to claim 5, characterized in that: The number of the second lifting ring groups (24) and the number of the second lifting hook groups (121) are both two, and the two second lifting ring groups (24) and the two second lifting hook groups (121) are arranged in a one-to-one correspondence; when the axial direction of the crane barrel (2) is parallel to the horizontal plane, the two second lifting ring groups (24) are spaced apart in the vertical direction.

7. The lifting tool according to claim 5, characterized in that: The second lifting ring (241) is provided with a first reinforcement member (25) on one side or both sides along the thickness direction, one end of the first reinforcement member (25) is fixedly connected to the second lifting ring (241), and the other end of the first reinforcement member (25) is fixedly connected to the inner peripheral wall of the second cylinder section (22).

8. The lifting tool according to claim 6, characterized in that: The crane barrel (2) further comprises a second reinforcement member (26), wherein the second reinforcement member (26) is fixedly connected between the two second lifting ring groups (24).

9. The lifting tool according to any one of claims 3 to 8, characterized in that: A positioning structure is provided at one end of the first cylinder section (21) away from the second cylinder section (22), and the positioning structure is used to locate the relative position of the first cylinder section (21) and the rotating side (100) of the hull.

10. The lifting tool according to any one of claims 3 to 8, characterized in that: A climbing ladder (27) is fixedly arranged inside the crane barrel (2), and the climbing ladder (27) extends along the axial direction of the crane barrel (2).

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