A method for increasing the construction batch of LNG ship dock

Abstract

The present invention discloses a method for improving the construction batch of LNG ship docks. The method specifically includes the following steps: first, arranging the LNG ship to be built in a compact dock within the dock; second, after the compact dock arrangement is completed, optimizing the LNG dock construction plan based on the dock assembly space and lifting load, and building the LNG ship within the LNG dock; third, after the LNG ship is built within the dock, towing the LNG ship to complete the construction and undocking of the LNHG ship. By arranging the compact dock and optimizing the LNG dock construction plan, the present invention eliminates various dock restrictions, shortens the LNG dock construction cycle, and thus improves the construction batch of LNG docks.

Description

Technical Field

[0001] The present invention belongs to the technical field of shipbuilding, and in particular relates to a method for increasing the construction batch of LNG ship docks. Background Art

[0002] Dockyards have always been a core resource for shipyards. Fully utilizing dockyard resources, increasing the number of docked ships leaving the dock, and shortening the shipbuilding cycle are key issues in addressing the development of shipbuilding and the inevitable path from a large manufacturing nation to a strong manufacturing power. Currently, my country's LNG carrier manufacturing lags significantly behind South Korea, primarily in docking cycles of 5-6 months versus 12-15 months. Although in-dock strength testing of the cargo hold area in recent years has enabled the containment system to begin operations 2-3 months earlier, shortening the docking cycle by 2-3 months, a significant gap still exists. Summary of the Invention

[0003] The purpose of the present invention is to overcome the deficiencies in the above-mentioned prior art and provide a method for improving the construction batch of LNG ship docks. The method of the present invention eliminates various restrictions on the docks and shortens the construction period of the LNG docks through a compact dock layout and optimizes the LNG dock construction plan, thereby improving the construction batches of LNG docks.

[0004] In order to achieve the above invention purpose, the technical solution provided by the present invention is as follows:

[0005] A method for increasing the construction batch of LNG ship docks, the method specifically comprising the following steps:

[0006] The first step is to arrange the LNG carrier to be built in a compact dock.

[0007] The second step is to optimize the LNG dock construction plan based on the dock assembly space and lifting load after the compact dock layout is completed, and then build the LNG ship in the LNG dock;

[0008] The third step is to tow the LNG ship out of the dock after the construction is completed in the dock, thus completing the construction and undocking of the LNHG ship.

[0009] The specific steps of the compact dock arrangement in the first step are: determining the restrictive conditions for the compact dock arrangement of LNG ships in the dock, and arranging the LNG ships in the dock according to the restrictive conditions; arranging two LNG ships in parallel in the dock, and staggering the two ships.

[0010] The restrictive conditions for the above-mentioned compact dock arrangement are specifically the safe distance for installing the stern shaft of the LNG ship to be built, the safe distance for installing the rudder blade and propeller, the safe distance between the LNG ships to be built in the dock, the distance between the LNG ships to be built and the dock wall and dock gate, the blind spot of the dock crane, the floating safe distance between the LNG ships to be built in the dock when floating, and the floating safe distance between the LNG ships to be built and the dock wall and dock gate.

[0011] The specific steps for optimizing the LNG dock construction plan in the above-mentioned second step are: modifying the dock pier structure at the dock gate; setting a stern axle trolley track at the stern of the LNG ship to be built, and the stern axle trolley uses the stern axle trolley track to transport the stern axle to the stern axle hole and install the stern axle in the stern axle hole; the optimization of the LNG dock construction plan also includes constructing the cargo hold ring section of the LNG ship to be built outside the dock according to the dock assembly site and lifting load, and after the cargo hold ring section is strength tested, it enters the dock for subsequent loading and outfitting.

[0012] The dock pier at the dock gate is arranged above the dock gate sewage ditch, and the dock pier at the dock gate crosses the dock gate sewage ditch to support the hull to be built for hull loading.

[0013] The above-mentioned stern axle trolley track is set at the stern of the LNG ship to be built, and the stern axle trolley track is perpendicular to the length of the LNG ship to be built. The stern axle trolley is installed on the stern axle trolley track, and the stern axle trolley runs on the stern axle trolley track. The stern axle is placed on the stern axle trolley, and the stern axle trolley moves on the stern axle trolley track to move the stern to the stern axle hole of the LNG ship to be built, and then the stern axle is installed in the stern axle hole of the LNG ship to be built to complete the stern axle installation.

[0014] The above two ships are arranged in parallel to build two LNG ships to be built side by side in the dock, with anti-collision balls arranged between the LNG ships to be built in the dock. After the LNG ships are built and floated, they are connected in parallel with cables, and the completed LNG ships are undocked in parallel through the dock towing device.

[0015] Based on the above technical solution, the method for improving the construction batch of LNG ship docks in the present invention has achieved the following technical advantages through practical application:

[0016] 1. The present invention provides a method for improving the construction batch of LNG ship docks by arranging a compact dock and optimizing the LNG dock construction plan, eliminating various restrictions on the dock, shortening the LNG dock construction period, and thus improving the construction batch of LNG docks.

[0017] 2. The present invention provides a method for improving the dock construction batch of LNG ships. By constructing the cargo hold ring section of the LNG ship to be built outside the dock and completing the strength test before entering the dock for subsequent loading and outfitting, the construction of the cargo hold ring section does not occupy the core resources of the dock. At the same time, it is also convenient to carry out the enclosure system construction in the dock in advance, thereby improving the construction efficiency of the LNG ship. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the annular overall section of the LNG ship cargo hold in a method for improving the construction batch of LNG ship docks according to the present invention.

[0019] Figure 2 It is a schematic diagram of the arrangement of LNG ships in a compact dock in a method for increasing the construction batch of LNG ship docks according to the present invention.

[0020] Figure 3 It is a schematic diagram of the arrangement of dock piers at the dock gate in a method for improving the construction batch of LNG ship docks according to the present invention.

[0021] Figure 4 This is a structural diagram of a stern axle trolley track in a method for improving the construction batch of an LNG ship dock according to the present invention.

[0022] Figure 5 It is a schematic diagram of two ships floating and towing out of the dock in parallel in a method for improving the construction batch of LNG ships in the present invention. DETAILED DESCRIPTION

[0023] To make the objectives, technical solutions, and advantages of the present invention more clearly apparent, the present invention is described below using specific examples shown in the accompanying drawings. However, it should be understood that these descriptions are merely illustrative and are not intended to limit the scope of the present invention. In addition, in the following description, descriptions of well-known structures and technologies are omitted to avoid unnecessary confusion of the concepts of the present invention.

[0024] like Figure 1-5 The present invention relates to a method for increasing the construction batch of LNG ship docks, which specifically comprises the following steps:

[0025] The first step is to arrange the LNG carrier 2 to be built in a compact dock in the dock;

[0026] The second step is to optimize the LNG dock construction plan based on the dock assembly space and lifting load after the compact dock layout is completed, and then build the LNG ship in the LNG dock;

[0027] The third step is to tow the LNG ship out of the dock after the construction is completed in the dock, thus completing the construction and undocking of the LNHG ship.

[0028] The specific steps of the compact dock arrangement in the first step are: determining the restrictive conditions for the compact dock arrangement of LNG ships in the dock, and arranging the LNG ships in the dock according to the restrictive conditions; arranging two LNG ships in parallel in the dock, and staggering the two ships.

[0029] The restrictive conditions during the above-mentioned compact dock arrangement are specifically the safety distance for the installation of the two stern shafts of the LNG ship to be built, the safety distance for the installation of the rudder blades and propellers, the safety distance between the LNG ships to be built in the dock, the distance between the LNG ship to be built and the dock wall and dock gate, the blind area of ​​the dock crane, the floating safety distance between the LNG ships to be built in the dock when floating, and the floating safety distance between the LNG ship to be built and the dock wall and dock gate; through the compact dock arrangement and optimization of the LNG dock construction plan, various restrictions on the dock are eliminated, the construction period of the LNG dock is shortened, and the construction batch of the LNG dock is increased; the blind area of ​​the dock crane includes a lifting blind area of ​​22.5 meters from the dock gate when two cranes are used in conjunction for lifting during dock loading operations; the ship's stern shaft, propeller and rudder blade are all under the stern section, making it impossible to use a crane to directly lift them into place, forming a lifting blind area.

[0030] The specific steps for optimizing the LNG dock construction plan in the above-mentioned second step are: modifying the dock pier 3 structure at the dock gate; setting a stern shaft trolley track 5 at the stern of the LNG ship 2 to be built, and the stern shaft trolley 4 uses the stern shaft trolley track 5 to transport the stern shaft to the stern shaft hole 6 and install the stern shaft in the stern shaft hole 6; the optimization of the LNG dock construction plan also includes constructing the cargo hold ring section 1 of the LNG ship to be built outside the dock according to the dock assembly site and lifting load, and entering the dock for subsequent loading and outfitting after the cargo hold ring section 1 is subjected to a strength test; the cargo hold ring section 1 of the LNG ship to be built is constructed outside the dock and completed the strength test before entering the dock for subsequent loading and outfitting, so that the construction of the cargo hold ring section 1 does not occupy the core resources of the dock, and it is also convenient to carry out the enclosure system construction in the dock in advance, thereby improving the construction efficiency of the LNG ship.

[0031] like Figure 3 As shown, the dock pier 3 at the dock gate is arranged above the dock gate sewage ditch, and the dock pier 3 at the dock gate crosses the dock gate sewage ditch to support the hull to be built for hull loading.

[0032] like Figure 4As shown, a stern shaft trolley track 5 is provided at the stern of the LNG ship 2 to be built, and the stern shaft trolley track 5 is perpendicular to the length of the LNG ship 2 to be built. A stern shaft trolley 4 is installed on the stern shaft trolley track 5, and the stern shaft trolley 4 runs on the stern shaft trolley track 5. The stern shaft is placed on the stern shaft trolley 4, and the stern shaft trolley 4 moves on the stern shaft trolley track 5 to move the stern to the stern shaft hole 6 of the LNG ship 2 to be built, and then the stern shaft is installed in the stern shaft hole 6 of the LNG ship 2 to be built to complete the stern shaft installation.

[0033] The above two ships are arranged in parallel to build two LNG ships 2 to be built side by side in the dock, and anti-collision balls 7 are arranged between the LNG ships 2 to be built in the dock. After the LNG ships are built and floated, they are connected in parallel with cables 8, and the completed LNG ships are undocked in parallel through the dock towing device.

[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to preferred embodiments, ordinary technicians in the field should understand that the specific implementation methods of the invention can still be modified or some technical features can be replaced by equivalents without departing from the spirit of the technical solutions of the present invention. They should all be included in the scope of the technical solutions for which protection is sought in the present invention.

Claims

1. A method for increasing the construction batch of LNG ship docks, characterized in that: The method specifically comprises the following steps: The first step is to arrange the LNG carrier to be built in a compact dock in the dock; The specific steps of the compact dock arrangement in the first step are: determining the restrictive conditions for the compact dock arrangement of the LNG ships in the dock, and arranging the LNG ships in the dock according to the restrictive conditions; arranging two LNG ships in parallel in the dock, and staggering the two ships; The restrictive conditions for the compact dock layout are specifically the safe distance for installing the stern shaft of the LNG ship to be built, the safe distance for installing the rudder blade and propeller, the safe distance between the LNG ships to be built in the dock, the distance between the LNG ships to be built and the dock wall and dock gate, the blind spot of the dock crane, the floating safe distance between the LNG ships to be built in the dock when floating, and the floating safe distance between the LNG ships to be built and the dock wall and dock gate; The second step is to optimize the LNG dock construction plan based on the dock assembly space and lifting load after the compact dock layout is completed, and to build the LNG ship in the LNG dock; The specific steps of optimizing the LNG dock construction plan in the second step are: modifying the dock pier at the dock gate; setting a stern shaft trolley track at the stern of the LNG ship to be built, and the stern shaft trolley uses the stern shaft trolley track to transport the stern shaft to the stern shaft hole and install the stern shaft in the stern shaft hole; the optimization of the LNG dock construction plan also includes constructing the cargo hold ring section of the LNG ship to be built outside the dock according to the dock assembly site and lifting load, and after the cargo hold ring section is strength tested, it enters the dock for subsequent loading and outfitting; The stern shaft trolley track is set at the stern of the LNG ship to be built, and the stern shaft trolley track is perpendicular to the length of the LNG ship to be built. The stern shaft trolley is installed on the stern shaft trolley track, and the stern shaft trolley runs on the stern shaft trolley track. The stern shaft is placed on the stern shaft trolley, and the stern shaft trolley moves on the stern shaft trolley track to move the stern shaft to the stern shaft hole of the LNG ship to be built, and then the stern shaft is installed in the stern shaft hole of the LNG ship to be built, thereby completing the stern shaft installation; The third step is to tow the LNG ship out of the dock after the construction is completed in the dock, thus completing the construction and undocking of the LNG ship.

2. A method for increasing the construction batch of LNG ship docks according to claim 1, characterized in that: The dock pier at the dock gate is arranged above the dock gate sewage ditch, and the dock pier at the dock gate crosses the dock gate sewage ditch to support the hull to be built for hull loading.

3. The method for increasing the construction batch of LNG ship dock according to claim 2, characterized in that: The two ships are arranged in parallel to build two LNG ships to be built side by side in the dock, and anti-collision balls are arranged between the LNG ships to be built in the dock. After the LNG ships are built and floated, they are connected in parallel with cables, and the completed LNG ships are undocked in parallel by the dock towing device.

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