A method for turning over and hoisting a composite dome cover of a ship

Abstract

The invention discloses a method for hoisting a ship turning over, comprising the following steps: step 1, making a rotary extension hoist; step 2, after installing an insulating module in the reverse state of a composite dome, installing the rotary extension hoist on a lifting ring on one side through a lifting hole as a turning over auxiliary hook; step 3, directly connecting a sling to the lifting ring on the other side as a turning over main hook; step 4, lifting the sling of the turning over main hook and the sling of the turning over auxiliary hook at the same time, lifting the composite dome to a certain height from the ground; step 5, continuing to lift the sling of the turning over main hook until the composite dome is in a vertical state; step 6, removing the sling of the turning over auxiliary hook, moving the sling to the front side of the composite dome, and connecting it to the proximal hole of the rotary extension hoist as a turning over auxiliary hook; step 7, lifting the sling at the turning over auxiliary hook until the composite dome is in a horizontal state.

Description

Technical Field

[0001] The invention belongs to the technical field of ship construction, and in particular relates to a method for turning over and hoisting a composite dome of a ship. Background Art

[0002] At present, during the construction of a ship, the composite dome with the insulation module installed cannot be turned over and hoisted. The existing solution is as follows: after the composite dome structure is completed, it is placed on the edge and the insulation module is installed on the reverse side. After the installation is completed, it is hoisted onto the ship. The above method has the following defects: (1) Due to the supine installation, the installation quality of the insulation module cannot be guaranteed, and there are quality risks. (2) The construction efficiency of the supine installation of the edge module is low.

[0003] In order to overcome the above defects, a study on the turning-over and hoisting method of the composite dome was conducted, and an attempt was made to realize the turning-over and hoisting of the composite dome after the insulation module was installed through the innovation of the turning-over and hoisting method. Summary of the invention

[0004] In view of the problems existing in the prior art, the present invention provides a method for hoisting and turning over a composite dome of a ship. The present invention uses a rotary extension sling to keep the wire rope away from the insulation module during the hoisting and turning over process, thereby completing the hoisting and turning over of the composite dome after the insulation module is installed. The sling itself is easy to assemble and disassemble, and matches the original lifting ring on the composite dome, reducing the difficulty of construction.

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

[0006] The present invention provides a method for turning over and hoisting a composite dome of a ship, comprising the following steps:

[0007] Step 1: Make a rotary extension sling, which is L-shaped, with a lifting hole set at the end corner of the rotary extension sling, a proximal hole set along the horizontal opposite end of the lifting hole, and a distal hole set along the vertical opposite end of the proximal hole;

[0008] Step 2: After installing the insulation module in the reverse state of the composite dome, install the rotary extension hanger through the lifting hole on the lifting ring on one side, and connect the sling to the far end hole of the hanger as a turning auxiliary hook;

[0009] Step 3: Connect the sling directly to the lifting ring on the other side as the main hook for turning over;

[0010] Step 4: The slings of the main hook and the auxiliary hook are lifted simultaneously to lift the composite dome to a certain height above the ground;

[0011] Step 5: The sling of the main hook continues to be lifted, and the sling of the auxiliary hook remains unchanged until the composite dome is in a vertical state and the auxiliary hook is not subjected to force;

[0012] Step 6: Remove the sling of the turning auxiliary hook, move the sling to the front side of the composite dome, and connect it to the proximal hole of the rotary extension sling to serve as the turning auxiliary hook;

[0013] Step 7: Lift the sling at the auxiliary hook and keep the sling at the main hook unchanged until the composite dome is in a horizontal state and installed at the designated position on the ship to complete the flipping and hoisting of the composite dome.

[0014] As a preferred technical solution, the rotary extension hanger includes an L-shaped main board and a reinforcement member, wherein the L-shaped main board is arranged in parallel in two, and the reinforcement member is arranged between the two L-shaped main boards.

[0015] As a preferred technical solution, the L-shaped main board includes a short side and a long side arranged vertically, a distal hole is arranged at the end of the long side, a proximal hole is arranged at the inflection point, and an assembly hole is arranged at the end of the short side.

[0016] As a preferred technical solution, the rotation angle of the L-shaped main board is 90 degrees, and the edge of the L-shaped main board abuts against the surrounding edge of the composite dome.

[0017] As a preferred technical solution, the front side of the composite dome is provided with reinforcing ribs, and the back side is provided with an insulating module.

[0018] As a preferred technical solution, a reinforcement tube is provided in the distal hole and the proximal hole.

[0019] As a preferred technical solution, two lifting rings are respectively provided on one side of the composite dome.

[0020] Compared with the prior art, the present invention has the following technical effects:

[0021] (1) The present invention installs a rotating extension sling on the lifting ring on one side of the turning auxiliary hook to ensure that the sling does not contact the insulation module during the turning process.

[0022] (2) The rotary extension sling of the present invention has a simple structure and low manufacturing cost. The rotary extension sling is assembled using only one bolt, and is easy and quick to assemble and disassemble. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 This is one of the structural schematic diagrams of the composite dome of the present invention.

[0025] Figure 2 This is the second structural schematic diagram of the composite dome of the present invention.

[0026] Figure 3 It is a structural schematic diagram of the rotary extension hanger of the present invention.

[0027] Figure 4 It is a construction flow chart of the present invention.

[0028] The specific descriptions of the reference numerals are as follows: composite dome 1, reinforcing rib 2, insulating module 3, lifting ring 4, surrounding edge 5, rotating extension hanger 6, distal hole 7, proximal hole 8, main board 9, lifting hole 10, reinforcing tube 11, reinforcing member 12. DETAILED DESCRIPTION

[0029] In the description of the present invention, it is necessary to understand that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention 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, and therefore cannot be understood as a limitation on the present invention.

[0030] Please refer to Figure 1 , schematic diagram of composite dome 1, composite dome 1 is a hatch cover on the top of LNG tank with both gas dome and liquid dome functions. The front of composite dome 1 is reinforced ribs 2 and surrounding edges 5, and the back is an insulation module 3. Two sets of lifting rings 4 are arranged on both sides of the front, and two lifting rings 4 are respectively provided on one side of the composite dome 1.

[0031] The hoisting method of the present invention comprises the following steps:

[0032] Step 1: Make a rotating extension hanger 6, which is L-shaped, with a hanging hole 10 set at the end corner of the rotating extension hanger 6, a proximal hole 8 set along the lateral opposite end of the hanging hole 10, and a distal hole 7 set along the vertical opposite end of the proximal hole 8;

[0033] Step 2: After the insulating module 3 is installed in the reverse state of the composite dome 1, the rotary extension sling 6 is installed on the lifting ring 4 on one side through the lifting hole 10, and the far end hole 7 of the sling is connected to the sling as a turning auxiliary hook;

[0034] Step 3: Connect the sling directly to the lifting ring 4 on the other side to serve as the main hook for turning over;

[0035] Step 4: The slings of the main hook and the auxiliary hook are lifted simultaneously to lift the composite dome to a certain height above the ground;

[0036] Step 5: The sling of the main hook continues to lift, and the sling of the auxiliary hook remains stationary until the composite dome 1 is in a vertical state and the auxiliary hook is not subjected to force;

[0037] Step 6: Remove the sling of the turning auxiliary hook, move the sling to the front side of the composite dome 1, and connect it to the proximal hole 8 of the rotary extension sling 6 to serve as the turning auxiliary hook;

[0038] Step 7: The lifting rope at the auxiliary hook is lifted, and the lifting rope at the main hook is kept still, until the composite dome 1 is in a horizontal state and installed at a designated position on the ship, thus completing the lifting and installation of the composite dome 1.

[0039] The rotating extension hanger 6 includes an L-shaped main board 9 and a reinforcement 12. The L-shaped main boards 9 are arranged in parallel in two pieces, and the reinforcement 12 is arranged between the two L-shaped main boards 9. The L-shaped main board 9 includes a short side and a long side arranged vertically, a distal hole 7 is arranged at the end of the long side, a proximal hole 8 is arranged at the folding point, and an assembly hole is arranged at the end of the short side. The rotation angle of the L-shaped main board 9 is 90 degrees, and the edge of the L-shaped main board 9 abuts against the surrounding edge 5 of the composite dome 1. A reinforcement tube 11 is arranged in the distal hole 7 and the proximal hole 8.

[0040] Although the above embodiments have been described in detail for the present invention, it should be understood by those skilled in the art that modifications or improvements may be made based on the contents disclosed in the present invention without departing from the spirit and scope of the present invention, and such modifications and improvements are within the spirit and scope of the present invention.

Claims

1. A method for turning over and hoisting a composite dome of a ship, characterized in that: The following steps are involved: Step 1: Make a rotary extension sling, which is L-shaped, with a lifting hole set at the end corner of the rotary extension sling, a proximal hole set along the horizontal opposite end of the lifting hole, and a distal hole set along the vertical opposite end of the proximal hole; Step 2: After installing the insulation module in the reverse state of the composite dome, install the rotary extension hanger through the lifting hole on the lifting ring on one side, and connect the sling to the far end hole of the hanger as a turning auxiliary hook; Step 3: Connect the sling directly to the lifting ring on the other side as the main hook for turning over; Step 4: The slings of the main hook and the auxiliary hook are lifted simultaneously to lift the composite dome to a certain height above the ground; Step 5: The sling of the main hook continues to be lifted, and the sling of the auxiliary hook remains unchanged until the composite dome is in a vertical state and the auxiliary hook is not subjected to force; Step 6: Remove the sling of the turning auxiliary hook, move the sling to the front side of the composite dome, and connect it to the proximal hole of the rotary extension sling to serve as the turning auxiliary hook; Step 7: Lift the sling at the auxiliary hook and keep the sling at the main hook unchanged until the composite dome is in a horizontal state and installed at the designated position on the ship to complete the flipping and hoisting of the composite dome.

2. A method for turning over and hoisting a composite dome of a ship as claimed in claim 1, characterized in that: The rotary extension hanger comprises an L-shaped main board and a reinforcement member. The L-shaped main board is arranged in two parallel parts, and the reinforcement member is arranged between the two L-shaped main boards.

3. A method for turning over and hoisting a composite dome of a ship as claimed in claim 2, characterized in that: The L-shaped main board comprises a short side and a long side which are arranged vertically, a distal hole is arranged at the end of the long side, a proximal hole is arranged at the folding point, and an assembly hole is arranged at the end of the short side.

4. A method for turning over and hoisting a composite dome of a ship as claimed in claim 3, characterized in that: The rotation angle of the L-shaped main board is 90 degrees, and the edge of the L-shaped main board abuts against the surrounding edge of the composite dome cover.

5. The method for turning over and hoisting a composite dome of a ship according to claim 1, characterized in that: The front side of the composite dome is provided with reinforcing ribs, and the back side is provided with an insulating module.

6. A method for turning over and hoisting a composite dome of a ship as claimed in claim 1, characterized in that: Reinforcement tubes are arranged in the distal hole and the proximal hole.

7. A method for turning over and hoisting a composite dome of a ship as claimed in claim 1, characterized in that: Two lifting rings are respectively arranged on one side of the composite dome.

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