PCTC ship deck block hoisting and inlaying type cabin entering method

Abstract

The invention discloses a PCTC ship deck block hoisting and inlaying type cabin entering method. The method comprises the following steps that 1, a deck block cabin entering path is simulated; 2, a hoisting weight and gantry crane hook setting scheme is constructed; step 3, preparing operation before hoisting into a cabin; step 4, horizontally hoisting the deck block to a hatch, and preparing to enter the cabin; and step 5, performing block cabin entering operation according to the cabin entering simulation path. According to the actual building requirements in the ship building process, the finished block is hoisted firstly, the segmented block above the main engine position is not hoisted, the block structure above the main engine is hoisted after the main engine comes goods, and the block is hoisted in an inlaying mode, so that the ship building period is shortened. By the adoption of the inlaying type cabin entering method, the ship building period is shortened, the time for waiting for carrying after the main engine arrives is shortened, and the carrying efficiency is improved.

Description

Technical Field

[0001] This invention belongs to the field of PCTC shipbuilding, specifically relating to a method for hoisting and inserting PCTC ship deck sections into the cabin. Background Technology

[0002] During shipbuilding, main sections are typically hoisted in sequence, with traditional main sections being hoisted into place from the air. However, in practice, factors can affect the hoisting sequence. For example, delays in the arrival of the main engine equipment may prevent the installation of the upper deck sections. If these sections are installed, it will affect the hoisting of the main engine into the hold, thus hindering the completion of half the ship. However, during periods of tight shipbuilding schedules, waiting for the main engine to arrive before continuing the hoisting would severely reduce construction efficiency.

[0003] The existing ship sections are lifted using the traditional method of following the loading sequence, which has the following problems: (1) If the hoisting is carried out in the traditional way, the hoisting will be delayed due to the untimely delivery of the main equipment, which will prolong the ship construction cycle.

[0004] (2) Waiting for the main unit to arrive will result in a waste of manpower and time.

[0005] (3) It affects the construction progress of half of the ship, thus delaying the valuable dock period and reducing the utilization rate of the dock. Summary of the Invention

[0006] To solve the above-mentioned technical problems, the present invention provides a method for hoisting and inserting PCTC ship deck sections into the cabin. According to the actual construction needs during the ship construction process, the completed sections are hoisted first, leaving the sections above the main engine position unhoisted. After the main engine arrives, the sections above the main engine are hoisted, and the sections are inserted and hoisted, thus shortening the ship construction cycle.

[0007] The objective of this invention is achieved through the following technical solution: a method for hoisting and inserting PCTC ship deck sections into the hold, comprising the following steps: Step 1: Simulate the entry path of the deck section into the cabin; Step 2: Construct a scheme for setting up lifting brackets and gantry crane hooks; Step 3: Preparations before hoisting into the cabin; Step 4: Lift the deck section horizontally to the hatch, ready for loading into the cabin; Step 5: Perform the main section entry operation according to the simulated entry path.

[0008] Preferably, in step 1, the simulation of the deck section entry path includes the following steps: Step 1.1: Adjust the deck section to an inclined position, with the bow end of the deck section being the lower end and the stern end being the higher end; Step 1.2: The deck section is inclined near the bow end and passes through decks 9 and 8 respectively, passing through the closest point to the edge of the movable deck of deck 8 to ensure a safe distance; Step 1.3: Lower the deck section vertically to a position that maintains a safe height relative to Deck 7; Step 1.4: Move the deck section forward towards the bow to the installation position; Step 1.5: Level the attitude of the deck section and place it in the installation position.

[0009] Preferably, in step 1.1, the inclination angle of the deck section is 15°-25°.

[0010] Preferably, the setting scheme for the lifting brackets and gantry crane hooks in step 2 is as follows: The lifting brackets are installed at the bow, stern, and center positions of the main deck, with two rows on each side; Setting the positions of the gantry crane hooks and lifting brackets.

[0011] Preferably, in step 3, the preparatory work before hoisting into the cabin includes: Deck surface cleaning; Remove the edge railings of deck 7; Temporary supports are installed between deck 8 and deck 7, and diagonal braces are installed on the temporary supports. Supports are installed between the movable decks. Work area security and monitoring.

[0012] Preferably, in step 4, the deck section is horizontally hoisted to the hatch to monitor the wind force.

[0013] Preferably, in step 5, during the hoisting process, the hoisting posture of the main section and the safe distance between the hoisting process and the surrounding structure are monitored in real time.

[0014] Compared with the prior art, the present invention has the following advantages: This invention provides a method for hoisting and inserting PCTC (Polycarbonate Controlled Tractor) deck sections into the ship's hold. By first hoisting the completed main sections, leaving the sections above the main engine position unhoisted, and then hoisting the main engine section after the main engine arrives, the main sections are then inserted into the hold. This method resolves the conflict between the delayed arrival of the main engine and the need for rapid assembly during production. During hoisting, the main sections are positioned at an angle, and the hoisting path and attitude are simulated to shorten the shipbuilding cycle.

[0015] This invention provides a method for hoisting and inserting PCTC (Polycarbonate Controlled Tractor) deck sections into cargo holds, shortening the shipbuilding cycle, reducing the time spent waiting for the main engine to arrive before installation, and improving installation efficiency. The method eliminates the need to disassemble the deck section into two separate structures for hoisting, reducing welding work on half of the ship, minimizing paint damage, and resulting in better pre-assembled integrity of the sections. This invention provides a new approach to section installation, not limited to conventional horizontal hoisting, and offers a reference for the attitude adjustment hoisting and inserting of other ship sections into cargo holds.

[0016] The method provided by this invention can improve loading efficiency, enhance the integrity of intermediate products, reduce manual waiting time, improve shipbuilding efficiency, and shorten the construction cycle in docks or wharves. Attached Figure Description

[0017] Figure 1 This is a flowchart of a method for hoisting and inserting PCTC ship deck sections into a compartment according to the present invention. Figure 2 This is a schematic diagram of the deck section lifting bracket arrangement in an embodiment of the present invention; Figure 3 This is a schematic diagram of the gantry crane hook arrangement for the deck section in an embodiment of the present invention; Figure 4 This is a schematic diagram of the temporary support and support arrangement for the movable deck in embodiment 8 of the present invention; Figure 5 for Figure 4 A schematic diagram of direction AA; Figure 6 This is a schematic diagram of the deck section and the already hoisted section in an embodiment of the present invention; Figure 7 for Figure 6 Top view; Figure 8 This is a schematic diagram of the deck section and the structure of decks 7, 8 and 9 in an embodiment of the present invention; Figure 9 This is a schematic diagram of the hoisting path for the deck section in an embodiment of the present invention. Detailed Implementation

[0018] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0019] The present invention provides a method for hoisting and inserting PCTC ship deck sections into the cabin, comprising the following steps: Step 1: Simulate the entry path of the deck section into the cabin; Step 2: Construct a scheme for setting up lifting brackets and gantry crane hooks; Step 3: Preparations before hoisting into the cabin; Step 4: Lift the deck section horizontally to the hatch, ensuring a safe height for attitude adjustment, with the lowest point 2000mm from the deck surface to avoid touching the hatch edge railing. Step 5: Perform the main section entry operation according to the simulated entry path.

[0020] In one embodiment of the present invention, step 1 involves simulating the entry path of the deck section into the cabin. The difficulty in inserting the deck section into the cabin lies in the fact that the hoisting of the section needs to cross decks 9 and 8 to reach deck 7. The movable deck of deck 8 extends approximately 600mm beyond the closing opening, making it impossible to hoist and place the XM071 deck section normally. Therefore, it is necessary to adjust the hoisting path by tilting the section to enter the cabin. In this embodiment, the path simulation method includes the following steps: Step 1.1: Rotate the XM071 deck section clockwise by 20° to adjust it to an inclined position, with the bow end of the deck section being the lower end and the stern end being the higher end; Step 1.2: Adjust the attitude and tilt of the deck section before hoisting. Tilt the section near the bow first and pass through decks 9 and 8 respectively. Ensure a safe distance of 300mm when passing through the edge of the movable deck of deck 8 and control to avoid collision with the movable deck structure of deck 8. Step 1.3: Continue to lower the XM071 deck section vertically until it maintains a safe distance of 300mm from deck 7, taking care to prevent collision; Step 1.4: Move the deck section 1300mm towards the bow to the installation position. During the movement, pay attention to the distance between the wire ropes, temporary support pipes, edge guardrails, etc. and the hull structure to prevent collisions. Step 1.5: Rotate the deck section counterclockwise slowly to level it, adjust its attitude to be horizontal, and place it in the installation position.

[0021] In one embodiment of the present invention, the arrangement of the lifting bracket and the gantry crane hook in step 2 is as follows: The lifting brackets are installed at the bow, stern, and center positions of the main deck, with two rows on each side; the gantry crane hooks are positioned in relation to the lifting brackets. In this embodiment, the specific arrangement is as follows: The XM071 deck section needs to be lifted and positioned while tilted. Firstly, based on the section's weight and center of gravity, the lifting clamps are arranged to facilitate lifting and positioning. After comprehensive consideration, eight ZA30 lifting clamps are placed on each of the FR31 / 51 crossbeams, symmetrically distributed along the center of gravity. The lifting clamps in the middle area of ​​the section are used as the #3 hook lifting clamps. The lifting clamp arrangement is as follows... Figure 2 As shown, the hooks are arranged as follows Figure 3As shown. Using hook #3 of the gantry crane, the middle two rows of lifting brackets are attached. The middle wire rope is routed continuously to ensure the safety and adjustment of the deck section's lifting posture. Hooks #1 and #2 are attached to the rows of lifting brackets closest to the bow and stern, respectively. The lifting posture of the deck section is adjusted by retracting and extending the wire ropes of hooks #1 and #2 on the gantry crane. Based on the angle of the section adjustment, the required height difference between hooks #1 and #2 is calculated to adjust the deck section's posture. The lifting brackets are welded according to the bracket layout diagram and hook diagram. After the welded joints pass inspection, the brackets are hooked according to the hook diagram.

[0022] In one embodiment of the present invention, step 3, the preparatory work before hoisting into the cabin includes: The main section should clean the deck surface to prevent debris from sliding off the deck surface due to the main section's tilt, thus posing a risk of being struck by objects. 7. The deck edge railing is too close to the deck edge, which affects the hoisting and insertion into the cabin. It needs to be removed in advance to prevent collision.

[0023] All temporary supports between decks 8 and 7 must be at least 1600mm away from the port (in this embodiment, one 8P04 deck support; two 8C04 movable deck supports; and one 8S04 movable deck support). To prevent the risk of collision with deck 8 during hoisting, diagonal bracing needs to be added to the temporary supports. The temporary supports must be fully welded at both ends, with a weld length ≥ 8. Movable decks are connected by support frames. The support and support frame arrangement is as follows... Figures 4 to 5 As shown.

[0024] During the hoisting operation, the work area is cordoned off, and personnel are assigned to monitor the operation; no personnel are allowed to remain in or pass through the work area. In one embodiment of the invention, in step 4, the deck section is horizontally hoisted to the hatch, and wind force is monitored.

[0025] In one embodiment of the present invention, in step 5, during the hoisting process, the hoisting posture of the main section and the safe distance between the hoisting process and the surrounding structure are monitored in real time.

[0026] The hoisting process of the main section was simulated. Based on the simulation results, the hoisting path and posture were adjusted. On-site personnel were assigned to monitor and adjust the process according to actual construction conditions, paying particular attention to the hoisting posture of the main section and the safe distance between the hoisting process and surrounding structures. Safety was maintained; if the safe distance was exceeded, work was immediately stopped and adjustments were made before continuing. The hoisting path and posture are as follows: Figures 7-9As shown. Specifically, XM071 rotates 20° clockwise; the lower position is near the bow, and the higher position is near the stern. The bow section first passes deck 8, reaching a point 340mm from the edge of the movable deck. XM071 descends vertically to 300mm from deck 7, maintaining a safe distance to prevent collisions. XM071 moves bowward 1300mm, maintaining a safe distance to prevent collisions. It is then horizontally lowered counter-clockwise, maintaining a safe distance to prevent collisions. It is then slowly lowered into position, maintaining a safe distance to prevent collisions. The deck section hoisting is complete. The above are preferred embodiments of the present invention. It should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A method for hoisting and inserting PCTC ship deck sections into the hold, characterized in that: The method includes the following steps: Step 1: Simulate the entry path of the deck section into the cabin; Step 2: Construct a scheme for setting up lifting brackets and gantry crane hooks; Step 3: Preparations before hoisting into the cabin; Step 4: Lift the deck section horizontally to the hatch, ready for loading into the cabin; Step 5: Perform the main section entry operation according to the simulated entry path.

2. The method for hoisting and inserting PCTC ship deck sections into the hold as described in claim 1, characterized in that: In step 1, the simulation of the deck section entry path includes the following steps: Step 1.1: Adjust the deck section to an inclined position, with the bow end of the deck section being the lower end and the stern end being the higher end; Step 1.2: The deck section is inclined near the bow end and passes through decks 9 and 8 respectively, passing through the closest point to the edge of the movable deck of deck 8 to ensure a safe distance; Step 1.3: Lower the deck section vertically to a position that maintains a safe height relative to Deck 7; Step 1.4: Move the deck section forward towards the bow to the installation position; Step 1.5: Level the attitude of the deck section and place it in the installation position.

3. The method for hoisting and inserting PCTC ship deck sections into the hold as described in claim 2, characterized in that: In step 1.1, the inclination angle of the deck section is 15°-25°.

4. The method for hoisting and inserting PCTC ship deck sections into the hold as described in claim 3, characterized in that: The setup scheme for the lifting brackets and gantry crane hooks in step 2 is as follows: The lifting brackets are installed at the bow, stern, and center positions of the main deck, with two rows on each side; Setting the positions of the gantry crane hooks and lifting brackets.

5. The method for hoisting and inserting PCTC ship deck sections into the hold as described in claim 4, characterized in that: Step 3, the preparatory work before hoisting into the cabin, includes: Deck surface cleaning; Remove the edge railings of deck 7; Temporary supports are installed between deck 8 and deck 7, and diagonal braces are installed on the temporary supports. Supports are installed between the movable decks. Work area security and monitoring.

6. The method for hoisting and inserting PCTC ship deck sections into the hold as described in claim 5, characterized in that: In step 4, the deck section is hoisted horizontally to the hatch to monitor the wind force.

7. The method for hoisting and inserting PCTC ship deck sections into the hold as described in claim 6, characterized in that: In step 5, during the hoisting process, the hoisting posture of the main section and the safe distance between the hoisting process and the surrounding structure are monitored in real time.

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