Hoisting method and hoisting structure for segmented deck

Abstract

The invention discloses a hoisting method and a hoisting structure for a segmented deck, the segmented deck comprises a plurality of ribbon holes, and the hoisting method for the segmented deck comprises the following steps: arranging a detachably connected hoisting structure on the ribbon holes; the hoisting device hoists the hoisting structure and the segmented deck connected to the hoisting structure through a steel wire rope. The hoisting structure is installed through the ribbon hole of the segmented deck, the situation that the surface structure is damaged due to the fact that the hoisting structure is directly installed on the surface of the segmented deck can be avoided, the hoisting structure and the ribbon hole which are detachably connected are matched for hoisting, connection is stable, the hoisting structure is convenient to disassemble and can be repeatedly used for hoisting, and cost is reduced.

Description

Technical Field

[0001] The invention relates to a method for hoisting a cargo deck segment of a car roll-on / roll-off ship during the manufacturing process, and in particular to a hoisting method and a hoisting structure for a segmented deck. Background Art

[0002] Segmented lifting is generally achieved by welding lifting rings on the segments. The specific method is to install and weld several pre-made steel lifting rings at specific positions on the segments, and then connect them to the wire rope of the crane through shackles to achieve lifting. Since the lifting ring itself does not belong to the segment, it needs to be cut off by flame cutting after the lifting is completed. The remaining pile feet after cutting need to be carbon planed and polished. The high temperature generated by cutting and carbon planing will destroy the completed paint and need to be repaired again. After cutting, the lifting ring can be reused only 1 to 3 times, and it will be scrapped when the upper limit is reached. The welding and cutting of the above-mentioned lifting rings, carbon planing and polishing of the pile feet, paint repair, and scrapping of the lifting ring materials all mean the investment of production costs such as materials, working hours, and energy, as well as the extension of the construction period. Summary of the invention

[0003] The technical problem to be solved by the present invention is to overcome the defect in the prior art that after the welding lifting rings are used for lifting operations, the surface of the segmented deck is damaged due to cutting off the welding lifting rings, and to provide a lifting method and lifting structure for the segmented deck.

[0004] The present invention solves the above technical problems through the following technical solutions:

[0005] Provided is a method for hoisting a segmented deck, wherein the segmented deck includes a plurality of tie holes, and the method for hoisting the segmented deck includes:

[0006] A detachably connected lifting structure is provided on the tie hole;

[0007] The hoisting device hoists the hoisting structure and the segmented deck connected to the hoisting structure through steel wire ropes.

[0008] In this scheme, the lifting structure is installed using the tie holes on the segmented deck, which can avoid the lifting structure being directly installed on the surface of the segmented deck, causing damage to the surface structure. The detachable and connected lifting structure cooperates with the tie holes for lifting, and the connection is stable. The lifting structure is easy to disassemble and can be reused for lifting, thereby reducing costs.

[0009] Preferably, the step of providing a detachably connected lifting structure on the tie hole comprises:

[0010] selecting four of the tie holes on the segmented deck;

[0011] The hoisting structure is installed on the four selected tie holes respectively.

[0012] In this solution, four tie holes are selected to install the lifting structure, which can make the lifting of the segmented deck more stable. If fewer lifting structures are installed, the force points of the lifting segmented deck will be insufficient, which may easily cause deformation of the segmented deck during operation. If more lifting structures are installed, costs will increase and construction efficiency will be reduced.

[0013] Preferably, the distance from any of the four selected tie holes to two adjacent sides of the segmented deck is 20%-30% of the side length of the segmented deck.

[0014] In this solution, four tie holes are selected at the above positions so that the entire segmented deck is evenly stressed. During the lifting process, the stress of the segmented deck is balanced and it is not easy to deform or dent, thereby improving the reliability of the lifting method.

[0015] Preferably, before the hoisting structure is respectively installed on the selected four tie holes, the following steps are included:

[0016] A thickening plate is arranged below the selected tie hole.

[0017] In this solution, a thickened plate is provided to protect the segmented deck during the hoisting process, so as to prevent the segmented deck from being deformed near the tie holes for installing the hoisting structure due to excessive stress at the connection between the segmented deck and the hoisting structure.

[0018] Preferably, the lifting device lifts the lifting structure and the segmented deck connected to the lifting structure through a steel wire rope, and comprises:

[0019] The lifting structures installed on the segmented deck are connected to the lifting points of the lifting devices respectively by using a plurality of steel wire ropes.

[0020] In this solution, steel wire ropes are used for connection to make the lifting more stable. The lifting points are connected to the installed lifting structures respectively so that each lifting structure receives tension. The segmented deck is not likely to deflect or tip over during the lifting process, causing damage to the segmented deck. The segmented deck is also evenly stressed and not easily deformed.

[0021] Preferably, the lifting device is provided with one or more lifting points, and the plurality of lifting structures and the plurality of lifting points are symmetrically connected along a direction perpendicular to the segmented deck.

[0022] In this solution, different lifting devices may have one or more lifting points, and multiple lifting structures can be connected to one lifting point or connected to multiple lifting points for lifting. When connecting multiple lifting points, they need to be connected symmetrically in a direction perpendicular to the segmented deck so that the segmented deck is subjected to balanced force during the lifting process and will not easily fall off or deform, causing damage to the segmented deck during the lifting process.

[0023] Preferably, the lifting device lifts the lifting structure and the segmented deck connected to the lifting structure through a steel wire rope, and comprises:

[0024] The segmented decks are hoisted to corresponding locations.

[0025] In this solution, the lifting device lifts the segmented deck to the corresponding position to complete the lifting operation.

[0026] Preferably, the lifting structure comprises an eye screw and a shackle, the eye screw comprises an eye portion and a bolt portion, the bolt portion extends into the tie hole, the shackle is connected to the eye of the eye portion, and the shackle can rotate around the eye portion.

[0027] In this scheme, eye screws are used for lifting, and the bolt part can be directly inserted into the tie hole to connect with the segmented deck without damaging the surface of the segmented deck. The shackle is connected to the eye of the eye part and can rotate relatively, so that the lifting structure can be adjusted at multiple angles to adapt to the lifting, which will not cause the lifting structure or the segmented deck to be damaged. The lifting structure has few components and is easy to load and unload. It can be disassembled and reused after lifting, which reduces costs.

[0028] Preferably, the lifting structure further comprises a nut and a pin, wherein the nut is threadedly connected to the bolt portion, the segmented deck is clamped between the nut and the lifting ring portion, and the pin is passed through the bolt portion.

[0029] In this solution, nuts are provided to fix the eyebolts to the tie holes of the segmented decks, so that during the lifting process, the segmented decks will not be separated from the eyebolts, causing the segmented decks to fall off and cause losses. When the lifting operation is completed, the lifting structure can be removed from the segmented decks by removing the nuts without damaging the structure and surface of the segmented decks, and the lifting structure can be reused. Providing a latch on the bolt part can prevent the nuts from loosening during the lifting process, causing the lifting structure to separate from the segmented decks, thereby avoiding damage to the segmented decks.

[0030] Preferably, the shackle is a U-shaped shackle, which is sleeved on both ends of the eye part and connected to the eye part through a shackle pin, and the shackle can rotate around the shackle pin; a certain space is provided between the shackle and the top surface of the eye part, and the space is used for passing the wire rope.

[0031] In this solution, a U-shaped buckle is used as a shackle, which has a simple structure and meets the use requirements. The two ends of the U-shaped buckle are connected to the lifting ring part through the shackle pin, which not only allows the shackle to rotate around the eye, but also during the lifting process, the shackle is not easy to separate from the lifting ring screw, causing damage to the segmented deck. A certain space is set between the shackle and the top surface of the lifting ring part, which is convenient for threading the wire rope, and also effectively reduces the wear between the wire rope and the lifting ring screw during the lifting process, thereby extending the service life of the lifting structure.

[0032] The positive and progressive effect of the present invention is that: utilizing the tie holes of the segmented deck to install the lifting structure can avoid directly installing the lifting structure on the segmented deck surface, which would damage the surface structure; and the detachably connected lifting structure cooperates with the tie holes for lifting, and the connection is stable; the lifting structure is easy to disassemble and can be reused for lifting, thereby reducing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 is a flow chart of steps of the method for hoisting a segmented deck in this embodiment;

[0034] Figure 2 is a flow chart of step S1 of the method for hoisting a segmented deck in this embodiment;

[0035] Figure 3 is a flow chart of step S2 of the method for hoisting a segmented deck in this embodiment;

[0036] Figure 4 Schematic diagram of the hoisting structure in this embodiment;

[0037] Figure 5 is a side view of the hoisting structure in this embodiment;

[0038] Figure 6 This is a schematic diagram of the hoisting structure in this embodiment being installed on the segmented deck and connected to the hoisting device via a steel wire rope (the hoisting device is not shown);

[0039] Description of reference numerals:

[0040] Sectional Deck 1

[0041] Cable tie hole 2

[0042] Lifting structure 3

[0043] Eyebolt 31

[0044] Ring part 311

[0045] Bolt part 312

[0046] Nut 32

[0047] Gasket 33

[0048] Latch 34

[0049] Shackle 35

[0050] Shackle pin 36

[0051] Shackle pin nut 37

[0052] Thickened plate 4

[0053] Wire Rope 5

[0054] Lifting point 6 DETAILED DESCRIPTION

[0055] The present invention is further described below by way of examples, but the present invention is not limited to the scope of the examples.

[0056] Example 1

[0057] In this embodiment, if Figure 1-6 As shown, a method for hoisting a segmented deck 1 is provided, wherein the segmented deck 1 includes a plurality of tie holes 2, and the method for hoisting the segmented deck 1 includes:

[0058] Step S1: a detachably connected lifting structure 3 is provided on the tie hole 2;

[0059] Step S2: The lifting device lifts the lifting structure 3 and the segmented deck 1 connected to the lifting structure 3 through the steel wire rope 5 .

[0060] Among them, the lifting structure 3 is installed using the tie holes 2 provided on the segmented deck 1, which can avoid the lifting structure 3 being directly installed on the surface of the segmented deck 1, causing the surface structure to be damaged, and the detachably connected lifting structure 3 cooperates with the tie holes 2 for lifting, the connection is stable, the lifting structure 3 is easy to disassemble, and can be reused for lifting, thereby reducing costs.

[0061] In step S1, it includes:

[0062] Step S11: Select four tie holes 2 on the segmented deck 1;

[0063] Step S12: installing the lifting structures 3 on the four selected tie holes 2 respectively.

[0064] Selecting four tie holes 2 to install the lifting structure 3 can make the segmented deck 1 more stable when being lifted. If fewer lifting structures 3 are installed, the force points of the segmented deck 1 are insufficient, and the segmented deck 1 is easily deformed during the operation. If more lifting structures 3 are installed, the cost is increased and the construction efficiency is reduced. In other embodiments, the number of tie holes 2 and lifting structures 3 is not specifically limited, as long as the segmented deck 1 is not damaged or deformed during the lifting process.

[0065] Specifically, the distance between any of the four tie holes 2 and the adjacent two sides of the segmented deck 1 is 20%-30% of the side length of the segmented deck 1. In this embodiment, the four tie holes 2 are selected at the intersection of one quarter of the adjacent two sides, so that the entire segmented deck 1 is evenly stressed. During the lifting process, the stress of the segmented deck 1 is balanced, and it is not easy to deform or dent, which improves the reliability of the lifting method. In other embodiments, the position of the tie hole 2 is not specifically limited, and it is only necessary to ensure that the segmented deck 1 is evenly stressed during the lifting process and will not be deformed or damaged.

[0066] Before step S12, the method includes:

[0067] Step S121: a thickening plate 4 is arranged below the selected tie hole 2.

[0068] The thickened plate 4 is used to protect the segmented deck 1 during the hoisting process, so as to prevent the segmented deck 1 from being deformed near the tie hole 2 for installing the hoisting structure 3 due to excessive stress at the connection between the segmented deck 1 and the hoisting structure 3. In other embodiments, other components may be provided instead of the protective plate, as long as they can protect the connection between the segmented deck 1 and the hoisting structure 3 from being deformed due to the stress during the hoisting process.

[0069] In step S2, it includes:

[0070] Step S21: Use a plurality of steel wire ropes 5 to respectively connect the lifting structure 3 installed on the segmented deck 1 to the lifting points 6 of the lifting device.

[0071] The steel wire rope 5 is used for connection to make the lifting more stable, and the lifting points 6 are connected to the installed lifting structures 3 respectively, so that each lifting structure 3 receives tension. During the lifting process, the segmented deck 1 is not likely to deflect or overturn, causing damage to the segmented deck 1, and the segmented deck 1 is evenly stressed and is not likely to deform.

[0072] Specifically, the lifting device is provided with one or more lifting points 6, and the multiple lifting structures 3 are symmetrically connected to the multiple lifting points 6 in a direction perpendicular to the segmented deck 1. Different lifting devices may have one or more lifting points 6, and the multiple lifting structures 3 may be connected to one lifting point 6 or to multiple lifting points 6 for lifting. When connecting multiple lifting points 6, they need to be connected symmetrically in a direction perpendicular to the segmented deck 1, so that the segmented deck 1 is subjected to balanced force during the lifting process, and will not fall off or deform easily, causing damage to the segmented deck 1 during the lifting process. In this embodiment, if Figure 6As shown, the lifting device is provided with a lifting point 6, and the four lifting structures 3 installed on the segmented deck 1 are respectively connected to the lifting point 6 through the steel wire rope 5, so as to ensure that the segmented deck 1 is subjected to balanced force during the lifting process and the lifting operation is performed horizontally. In other embodiments, the lifting device can also be provided with multiple lifting points 6 for lifting, and it is only necessary to keep the segmented deck 1 balanced during the lifting process.

[0073] In step S2, it includes:

[0074] Step S22: hoisting the segmented deck 1 to a corresponding position.

[0075] The segmented deck 1 is lifted from the bracket by the lifting device and lifted to the corresponding position to complete the lifting operation.

[0076] In this embodiment, if Figure 4-5 As shown, a lifting structure 3 is provided, including an eyebolt 31 and a shackle 35. The eyebolt 31 includes an eye portion 311 and a bolt portion 312. The bolt portion 312 can be inserted into the tie hole 2. The shackle 35 is connected to the eye of the eye portion 311, and the shackle 35 can rotate around the eye portion 311. When the eyebolt 31 is used for lifting, the bolt portion 312 can be directly inserted into the tie hole 2 to connect with the segmented deck 1 without damaging the surface of the segmented deck 1. The shackle 35 is connected to the eye of the eye portion 311 and can rotate relatively, so that the lifting structure 3 can be adjusted at multiple angles to adapt to lifting, and the lifting structure 3 or the segmented deck 1 will not be damaged. The lifting structure 3 has few components and is easy to load and unload. After lifting, it can be disassembled and reused, reducing costs.

[0077] Furthermore, the hoisting structure 3 also includes a nut 32 and a pin 34. The nut 32 is threadedly connected to the bolt part 312, and the segmented deck 1 is clamped between the nut 32 and the eye part 311. The pin 34 is inserted into the bolt part 312. The nut 32 is used to fix the eye screw 31 to the tie hole 2 of the segmented deck 1, so that during the hoisting process, the segmented deck 1 will not be separated from the eye screw 31, causing the segmented deck 1 to fall off and cause losses. At the same time, a gasket 33 is provided between the thickened plate 4 and the nut 32, which can effectively disperse stress during hoisting to prevent the contact area between the thickened plate 4 and the nut 32 from being too small, causing wear on the contact surface. When the hoisting operation is completed, the hoisting structure 3 can also be removed from the segmented deck 1 by disassembling the nut 32 without damaging the structure and surface of the segmented deck 1, and the hoisting structure 3 can be reused. The bolt portion 312 is provided with a latch 34 to prevent the nut 32 from loosening during the lifting process, which may cause the lifting structure 3 to separate from the segmented deck 1, thereby preventing the segmented deck 1 from being damaged. In other embodiments, other fasteners may be provided instead of the nut 32, as long as the lifting structure 3 does not fall off the segmented deck 1 during the lifting process.

[0078] Specifically, Figure 5 As shown, the shackle 35 is a U-shaped buckle, which is sleeved on both ends of the lifting ring part 311 and connected to the lifting ring part 311 through the shackle pin 36. The shackle 35 can rotate around the shackle pin 36; a certain space is set between the shackle 35 and the top surface of the lifting ring part 311, and the space is used to pass the wire rope 5. In this embodiment, the shackle 35 nut 32 is set to fix the shackle pin 36 so that it will not fall off during the lifting process. The U-shaped buckle is used as the shackle 35, which has a simple structure and meets the use requirements. The two ends of the U-shaped buckle are connected to the lifting ring part 311 through the shackle pin 36, which not only allows the shackle 35 to rotate around the eye, but also during the lifting process, the shackle 35 is not easy to be separated from the lifting ring screw 31, resulting in damage to the segmented deck 1. A certain space is set between the shackle 35 and the top surface of the lifting ring part 311, which is convenient for passing the wire rope 5, and also effectively reduces the wear between the wire rope 5 and the lifting ring screw 31 during the lifting process, thereby extending the service life of the lifting structure 3. In other possible embodiments, the structure of the shackle 35 is not specifically limited, and it only needs to be able to rotate relative to the eye screw 31 and allow the eye screw 31 to pass the wire rope 5.

[0079] Although the specific embodiments of the present invention are described above, it should be understood by those skilled in the art that this is only for illustration and the protection scope of the present invention is defined by the appended claims. Those skilled in the art may make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, but these changes and modifications all fall within the protection scope of the present invention.

Claims

1. A method for rigging a segmented deck, wherein the segmented deck comprises a plurality of tie holes, characterized in that: The method for lifting the segmented deck comprises: A detachably connected lifting structure is provided on the tie hole; The hoisting device hoists the hoisting structure and the segmented deck connected to the hoisting structure through steel wire ropes.

2. The method for assembling a segmented deck according to claim 1, characterized in that: The step of providing a detachably connected lifting structure on the tie hole comprises: selecting four of the tie holes on the segmented deck; The hoisting structure is installed on the four selected tie holes respectively.

3. The method for assembling a segmented deck according to claim 2, characterized in that: The distance from any of the four selected tie holes to two adjacent sides of the segmented deck is 20%-30% of the side length of the segmented deck.

4. The method for assembling a segmented deck according to claim 2, characterized in that: Before respectively installing the hoisting structure on the four selected tie holes, the method includes: A thickening plate is arranged below the selected tie hole.

5. The method for assembling a segmented deck according to claim 1, characterized in that: The hoisting device is connected to the hoisting structure through a steel wire rope, comprising: The lifting structures installed on the segmented deck are connected to the lifting points of the lifting devices respectively by using a plurality of steel wire ropes.

6. The method for assembling a segmented deck according to claim 5, characterized in that: The lifting device is provided with one or more lifting points, and the plurality of lifting structures and the plurality of lifting points are symmetrically connected along a direction perpendicular to the segmented deck.

7. The method for assembling a segmented deck according to claim 5, characterized in that: The lifting device lifts the lifting structure and the segmented deck connected to the lifting structure through a steel wire rope, and comprises: The segmented decks are hoisted to corresponding locations.

8. A hoisting structure, applicable to the hoisting method according to any one of claims 1 to 7, characterized in that: The lifting structure comprises an eye screw and a shackle, wherein the eye screw comprises an eye portion and a bolt portion, the bolt portion extends into the tie hole, the shackle is connected to the eye of the eye portion, and the shackle can rotate around the eye portion.

9. The hanging structure according to claim 8, characterized in that: The lifting structure also includes a nut and a pin, the nut is threadedly connected to the bolt part, the segmented deck is clamped between the nut and the lifting ring part, and the pin is passed through the bolt part.

10. The hanging structure according to claim 8, characterized in that: The shackle is a U-shaped shackle, which is sleeved on both ends of the lifting ring part and connected to the lifting ring part through a shackle pin. The shackle can rotate around the shackle pin. A certain space is provided between the shackle and the top surface of the lifting ring part, and the space is used for passing the wire rope.

Images