Main and auxiliary hook lifting type eccentric lifting appliance and lifting method

Abstract

The invention provides a main and auxiliary hook lifting type eccentric lifting appliance and a lifting method, and relates to the technical field of ship lifting, the main and auxiliary hook lifting type eccentric lifting appliance comprises a supporting beam, a main lifting hook and an auxiliary lifting hook, lifting shaft assemblies are arranged on the two sides of the supporting beam, and upper connecting locks are connected to the lifting shaft assemblies; the upper connecting lock comprises a first joint-free rope loop rigging, a second joint-free rope loop rigging and a third joint-free rope loop rigging; the first joint-free rope loop rigging, the second joint-free rope loop rigging and the main lifting hook are connected, the third joint-free rope loop rigging and the auxiliary lifting hook are connected, under the condition that the load of the main lifting hook is limited, the load and the distance of lifting points can be flexibly adjusted according to the gravity center position of a lifted object through matched use of the auxiliary lifting hook and the main lifting hook, and the lifting efficiency is improved. The lifting bearing of the main lifting hook and the auxiliary lifting hook is reasonably distributed to adapt to different lifting environments, so that the lifting appliance is lighter, the application range of the lifting appliance is widened, and the lifting requirements of various complex ships are met.

Description

Technical Field

[0001] The invention relates to the technical field of ship hoisting, and in particular to a main-and-auxiliary hook lifting type eccentric hoist and a hoisting method. Background Art

[0002] There are many kinds of lifting tools for ship lifting projects, mainly including cable lifting tools, suction cup lifting tools, hydraulic cylinder lifting tools and professional crane booms. Cable lifting tools are composed of hundreds of meters of steel cables, with high reliability and strong load-bearing capacity. They are often used for hanging, pulling and supporting the hull. Suction cup lifting tools are fixed to the surface of the hull by the negative pressure generated on the suction cup. They are particularly suitable for heavy-loaded objects with flat surfaces and no other lifting methods. Hydraulic cylinder lifting tools use hydraulic principles to automatically adjust water pressure and flow to achieve the lifting of large loads. In addition, ships are also equipped with various cranes, such as deck cranes, including fixed rotating cranes, mobile rotating cranes and gantry cranes. These cranes are equipped with various structural forms such as telescopic arms, fixed types and combined types through electric or electric-hydraulic transmission methods, which can meet different lifting needs. These lifting tools play a vital role in ship lifting projects and ensure the safety and efficiency of lifting operations. In many ship lifting engineering scenarios, there are often situations where space and lifting equipment load are limited. Traditional lifting equipment is difficult to use in such an environment, and due to its own heavy weight, the difficulty and cost of lifting are increased. In summary, there is a need for a lifting equipment that can be used in an environment with limited lifting space and has lightweight characteristics. Therefore, the present invention proposes a main and auxiliary hook lifting type eccentric lifting equipment and a lifting method to solve the problems existing in the prior art. Summary of the invention

[0003] In view of the above problems, the present invention proposes an eccentric hoist with main and auxiliary hooks and a hoisting method. When the load of the main hook is limited, the eccentric hoist with main and auxiliary hooks can flexibly adjust the load and spacing of the lifting points according to the center of gravity of the hoisted object through the coordinated use of the auxiliary hook and the main hook, and reasonably distribute the lifting loads of the main hook and the auxiliary hook to adapt to different lifting environments, thereby making the hoist lighter and broadening the application scope of the hoist, meeting the needs of various complex ship hoisting.

[0004] To achieve the purpose of the present invention, the present invention is implemented through the following technical solutions: a main-and-auxiliary hook lifting type eccentric sling, comprising a support beam, a main hook and an auxiliary hook, both sides of the support beam are provided with a suspension shaft assembly, and the suspension shaft assembly is connected to an upper connection lock, and the upper connection lock comprises a first endless rope loop sling, a second endless rope loop sling and a third endless rope loop sling; The lower ends of the first and second endless rope loop riggings are respectively connected to the suspension shaft assemblies on both sides, and the upper ends of the first and second endless rope loop riggings are connected to the main hook, the lower end of the third endless rope loop rigging is connected to the suspension shaft assembly at one end, and the upper end of the third endless rope loop rigging is connected to the auxiliary hook, and the lower connecting rigging is connected to the bottom of the two groups of suspension shaft assemblies.

[0005] A further improvement is that the suspension shaft assembly includes a load-bearing plate, an upper suspension shaft and a lug plate, the load-bearing plate is "L"-shaped and has a round hole, the upper suspension shaft passes through the round hole of the load-bearing plate and is connected to the load-bearing plate, the lug plate is arranged on the lower side of the load-bearing plate, and lower suspension shafts are provided at both ends of the lug plate.

[0006] A further improvement is that the lower ends of the first and second endless rope loop riggings are respectively connected to the upper hanging shafts of the hanging shaft assemblies on both sides, and the lower end of the third endless rope loop rigging is connected to the upper hanging shaft of the hanging shaft assembly at one end.

[0007] A further improvement is that the lower suspension shaft and the lifting ear plate rotate axially, the upper end of the lower connecting rigging is connected to the lower suspension shafts of the suspension shaft assemblies on both sides, and the lower end of the lower connecting rigging is connected to the suspended object.

[0008] A further improvement is that an end plate is provided on one side of the load-bearing plate, and one side of the end plate is fixedly connected to the support beam.

[0009] A method for hoisting a main-and-auxiliary hook lifting type eccentric hoist comprises the following steps: Step 1: Determine the lifting point according to the size and center of gravity of the object being lifted; Step 2: Determine the length of the upper connecting rigging according to the lifting capacity and adjustable spacing of the main hook and auxiliary hook of the lifting equipment used on site; Step 3: Use the main and auxiliary hook lifting eccentric lifting device for layout; Step 4: Fix the main and auxiliary hook lifting eccentric slings and the lifting points of the objects to be lifted at the ends; Step 5: Lift the object to the predetermined location for installation.

[0010] A further improvement is that in the step three, during the layout, the upper ends of the first and second jointless rope loop rigging of the main and auxiliary hook lifting eccentric sling are connected to the main hook, and the upper end of the third jointless rope loop rigging is connected to the auxiliary hook.

[0011] A further improvement is that in step 4, the end is fixed by connecting the lower rigging to the lifting point of the object to be lifted.

[0012] The beneficial effects of the present invention are: 1. The present invention is connected to the main hook through the first seamless rope loop rigging, the second seamless rope loop rigging, and is connected to the auxiliary hook through the third seamless rope loop rigging. When the load of the main hook is limited, the load and spacing of the lifting points can be flexibly adjusted according to the center of gravity of the object to be lifted by using the auxiliary hook in coordination with the main hook. The lifting loads of the main hook and the auxiliary hook are reasonably distributed to adapt to different lifting environments, making the sling lighter, and broadening the scope of application of the sling to meet the needs of various complex ship lifting.

[0013] 2. The main hook and auxiliary hook of the present invention are connected to the upper hanging shafts on both sides of the support beam through the upper connecting rigging, and the lower connecting rigging passes through the lower hanging shaft at the lower end of the support beam to be connected to the hoisted object, which greatly reduces the weight of the sling itself, shortens the requirements for the hook spacing, reduces the requirements for lifting equipment, can fully utilize the lifting load of the main hook and auxiliary hook, improves the feasibility of the lifting operation, and ensures the safety and stability of the lifting process. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a front view of the present invention; Figure 2 It is a lifting schematic diagram of the present invention; Figure 3 It is a side schematic diagram of the lifting of the present invention; Figure 4 It is a schematic diagram of the suspension shaft assembly of the present invention.

[0015] Among them: 1. Support beam; 2. Main hook; 3. Auxiliary hook; 4. First endless rope loop rigging; 5. Second endless rope loop rigging; 6. Third endless rope loop rigging; 7. Lower connecting rigging; 8. Load-bearing plate; 9. Upper hanging shaft; 10. Lifting ear plate; 11. Lower hanging shaft; 12. End plate. DETAILED DESCRIPTION

[0016] In order to deepen the understanding of the present invention, the present invention will be further described in detail below in conjunction with examples. The examples are only used to explain the present invention and do not constitute a limitation on the protection scope of the present invention.

[0017] Embodiment 1 according to Figure 1 , 2 As shown in Figures 3 and 4, this embodiment proposes a main-and-auxiliary hook lifting type eccentric sling, comprising a support beam 1, a main hook 2 and an auxiliary hook 3, both sides of the support beam 1 are provided with a suspension shaft assembly, and the suspension shaft assembly is connected to an upper connection lock, and the upper connection lock comprises a first endless rope loop rigging 4, a second endless rope loop rigging 5 and a third endless rope loop rigging 6; The lower ends of the first and second endless rope loop riggings 4 and 5 are respectively connected to the suspension shaft assemblies on both sides, and the upper ends of the first and second endless rope loop riggings 4 and 5 are connected to the main hook 2, the lower end of the third endless rope loop rigging 6 is connected to the suspension shaft assembly at one end, and the upper end of the third endless rope loop rigging 6 is connected to the auxiliary hook 3, and the lower connecting rigging 7 is connected to the bottom of the two groups of suspension shaft assemblies. When in use, it is connected to the main hook 2 through the first seamless rope loop rigging 4 and the second seamless rope loop rigging 5, and is connected to the auxiliary hook 3 through the third seamless rope loop rigging 6. When the load capacity of the main hook 2 is limited, the auxiliary hook 3 and the main hook 2 can be used in coordination to flexibly adjust the load and spacing of the lifting points according to the center of gravity of the lifted object, and reasonably distribute the lifting loads of the main hook 2 and the auxiliary hook 3 to adapt to different lifting environments, making the lifting equipment lighter and broadening the scope of application of the lifting equipment to meet the needs of various complex ship lifting.

[0018] The suspension shaft assembly includes a load-bearing plate 8, an upper suspension shaft 9 and a lug plate 10. The load-bearing plate 8 is in an "L" shape and has a round hole. The upper suspension shaft 9 passes through the round hole of the load-bearing plate 8 and is connected to the load-bearing plate 8. The lug plate 10 is arranged on the lower side of the load-bearing plate 8, and lower suspension shafts 11 are arranged at both ends of the lug plate 10. The lower ends of the first and second jointless rope loop riggings 4 and 5 are respectively connected to the upper suspension shafts 9 of the suspension shaft assembly on both sides, and the lower end of the third jointless rope loop rigging 6 is connected to the upper suspension shaft 9 of the suspension shaft assembly at one end. The lower suspension shaft 11 and the lug plate 10 rotate axially, the upper end of the lower connecting rigging 7 is connected to the lower suspension shafts 11 of the suspension shaft assembly on both sides, and the lower end of the lower connecting rigging 7 is connected to the suspended object. The main hook 2 and the auxiliary hook 3 are connected to the upper hanging shaft 9 on both sides of the support beam 1 through the upper connecting rigging, and the lower connecting rigging 7 is connected to the suspended object through the lower hanging shaft 11 at the lower end of the support beam 1, which greatly reduces the weight of the sling itself, shortens the requirements for the hook spacing, reduces the requirements for the lifting equipment, can make full use of the lifting load of the main hook 2 and the auxiliary hook 3, improves the feasibility of the lifting operation, and ensures the safety and stability of the lifting process.

[0019] An end plate 12 is provided on one side of the load-bearing plate 8, and one side of the end plate 12 is fixedly connected to the support beam 1. The end plate 12 is used to connect the load-bearing plate 8 and the support beam 1, and is fixed by welding. A circle of reinforcing ribs is provided on the end plate 12 to improve the stability and firmness of the connection.

[0020] Embodiment 2 according to Figure 1 , 2 As shown in , 3 and 4, this embodiment proposes a method for hoisting a main and auxiliary hook lifting type eccentric hoist, comprising the following steps: Step 1: Determine the lifting point according to the size and center of gravity of the object being lifted; Step 2: Determine the length of the upper connecting rigging according to the lifting capacity and adjustable spacing of the main hook 2 and the auxiliary hook 3 of the lifting equipment used on site; through the coordinated use of the auxiliary hook 3 and the main hook 2, the load and spacing of the lifting points can be flexibly adjusted according to the center of gravity position of the hoisted object, and the lifting load of the main hook 2 and the auxiliary hook 3 can be reasonably distributed to adapt to different lifting environments, making the lifting equipment lighter and broadening the scope of application of the lifting equipment; Step 3: Use the main and auxiliary hook lifting eccentric sling for layout; when laying out, connect the upper ends of the first jointless rope loop rigging 4 and the second jointless rope loop rigging 5 of the main and auxiliary hook lifting eccentric sling to the main hook 2, and connect the upper end of the third jointless rope loop rigging 6 to the auxiliary hook 3; Step 4: Fix the main and auxiliary hook lifting eccentric sling to the lifting point of the object; specifically: use the lower connecting rigging 7 to fix the lifting point of the object; the main hook 2 and the auxiliary hook 3 are connected to the upper hanging shaft 9 on both sides of the support beam 1 through the upper connecting rigging, and the lower connecting rigging 7 passes through the lower hanging shaft 11 at the lower end of the support beam 1 and is connected to the object, which greatly reduces the weight of the sling itself, shortens the requirements for the hook spacing, reduces the requirements for the lifting equipment, and can fully utilize the lifting load of the main hook 2 and the auxiliary hook 3; Step 5: Lift the object to the predetermined location for installation.

[0021] The present invention is connected to the main hook 2 through the first jointless rope loop rigging 4 and the second jointless rope loop rigging 5, and connected to the auxiliary hook 3 through the third jointless rope loop rigging 6. When the load of the main hook 2 is limited, the auxiliary hook 3 and the main hook 2 can be used in coordination to flexibly adjust the load and spacing of the lifting points according to the center of gravity of the object being lifted, and reasonably distribute the lifting loads of the main hook 2 and the auxiliary hook 3 to adapt to different lifting environments, so that the sling is more lightweight, and the applicable scope of the sling is broadened to meet the needs of various complex ship lifting. At the same time, the main hook 2 and the auxiliary hook 3 are connected to the upper hanging shaft 9 on both sides of the support beam 1 through the upper connecting rigging, and the lower connecting rigging 7 is connected to the object being lifted through the lower hanging shaft 11 at the lower end of the support beam 1, which greatly reduces the weight of the sling itself, shortens the requirements for the hook spacing, reduces the requirements for the lifting equipment, can fully utilize the lifting load of the main hook 2 and the auxiliary hook 3, improve the feasibility of the lifting operation, and ensure the safety and stability of the lifting process.

[0022] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A main and auxiliary hook lifting type eccentric lifting device, comprising a support beam (1), a main lifting hook (2) and an auxiliary lifting hook (3), characterized in that: Both sides of the support beam (1) are provided with a suspension shaft assembly, and the suspension shaft assembly is connected to an upper connection lock, and the upper connection lock comprises a first endless rope loop rigging (4), a second endless rope loop rigging (5) and a third endless rope loop rigging (6); The lower ends of the first endless rope loop rigging (4) and the second endless rope loop rigging (5) are respectively connected to the suspension shaft assemblies on both sides, and the upper ends of the first endless rope loop rigging (4) and the second endless rope loop rigging (5) are both connected to the main hook (2), the lower end of the third endless rope loop rigging (6) is connected to the suspension shaft assembly at one end, and the upper end of the third endless rope loop rigging (6) is connected to the auxiliary hook (3), and the lower parts of the two groups of suspension shaft assemblies are connected to the lower connecting rigging (7).

2. The main and auxiliary hook lifting eccentric sling according to claim 1, characterized in that: The suspension shaft assembly comprises a bearing plate (8), an upper suspension shaft (9) and a lug plate (10); the bearing plate (8) is L-shaped and has a circular hole; the upper suspension shaft (9) passes through the circular hole of the bearing plate (8) and is connected to the bearing plate (8); the lug plate (10) is arranged on the lower side of the bearing plate (8), and lower suspension shafts (11) are arranged at both ends of the lug plate (10).

3. The main and auxiliary hook lifting eccentric sling according to claim 2, characterized in that: The lower ends of the first endless rope loop rigging (4) and the second endless rope loop rigging (5) are respectively connected to the upper hanging shafts (9) of the hanging shaft assembly at both sides, and the lower end of the third endless rope loop rigging (6) is connected to the upper hanging shaft (9) of the hanging shaft assembly at one end.

4. The main and auxiliary hook lifting eccentric sling according to claim 3, characterized in that: The lower suspension shaft (11) and the lifting lug plate (10) rotate axially, the upper end of the lower connecting rigging (7) is connected to the lower suspension shafts (11) of the suspension shaft assemblies on both sides, and the lower end of the lower connecting rigging (7) is connected to the suspended object.

5. The main and auxiliary hook lifting eccentric sling according to claim 2, characterized in that: An end plate (12) is provided on one side of the load-bearing plate (8), and one side of the end plate (12) is fixedly connected to the support beam (1).

6. A method for hoisting an eccentric sling with a main and auxiliary hook, using the eccentric sling with a main and auxiliary hook as claimed in any one of claims 1 to 5, characterized in that: The following steps are involved: Step 1: Determine the lifting point according to the size and center of gravity of the object being lifted; Step 2: Determine the length of the upper connecting rigging according to the lifting capacity and adjustable spacing of the main hook (2) and the auxiliary hook (3) of the lifting equipment used on site; Step 3: Use the main and auxiliary hook lifting eccentric lifting device for layout; Step 4: Fix the main and auxiliary hook lifting eccentric slings and the lifting points of the objects to be lifted at the ends; Step 5: Lift the object to the predetermined location for installation.

7. A method for hoisting a main and auxiliary hook lifting eccentric sling according to claim 6, characterized in that: In the step three, during the layout, the upper ends of the first seamless rope loop rigging (4) and the second seamless rope loop rigging (5) of the main and auxiliary hook lifting eccentric sling are connected to the main hook (2), and the upper end of the third seamless rope loop rigging (6) is connected to the auxiliary hook (3).

8. A method for hoisting a main and auxiliary hook lifting eccentric sling according to claim 6, characterized in that: In step 4, the lower connecting rigging (7) is used to fix the end of the object to be suspended with the suspension point.

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