Lateral laying method for wing-shaped sail of LNG (liquefied natural gas) ship

Abstract

According to the LNG ship wing-shaped sail side laying method, main decks on the two sides of a ship body are lower than a convex deck in the middle of the ship body, the main decks are in transition connection with the convex deck through inclined decks, deck frames are arranged on the main decks, sail face supporting components are arranged at the positions corresponding to the positions of the deck frames, and the sail face supporting components are fixed to the inclined decks; the sail base is fixed to the deck frame, and after the sail face is put down, the end of the sail face falls on the sail face supporting component. The sail face supporting component is composed of sail face supporting stand columns and end point supporting blocks. And when the sail surface stops being used, the sail surface is recovered to the front surface, then the sail surface is rotated by an angle R, and then the sail surface is put down after being inwards rotated by 1 degree. By means of the structure and characteristics of the LNG ship, the sail device is placed in the area between the main deck and the inclined deck, the sail installation height is reduced, and the influence of the sail standing state on the blind area is reduced.

Description

Technical Field

[0001] The invention belongs to the field of design and construction of LNG ships with sails, and in particular relates to a method for side-laying a wing-shaped sail of an LNG ship. Background Art

[0002] After nearly five years of continuous technical research and ship type development for the 175,000 cubic meter MARK III Flex LNG carrier, the development and design of large LNG carriers have achieved positive results. With many shipyards and design institutes committed to the R&D, design, optimization, upgrading and iteration of large LNG carriers, the overall performance of large LNG carriers has been continuously optimized and improved, showing an increasingly fierce overall competition. In addition, the continuous updating of new standards and new technologies has also forced the industry to actively innovate the technical solutions of large LNG carriers, improve the comprehensive level and market competitiveness, and make early arrangements to win more market orders.

[0003] LNG has limited emission reduction capacity, and it is necessary to carry out research on the application of low-carbon and zero-carbon technologies in large LNG carriers to further reduce carbon dioxide emissions from large LNG carriers. There has been no successful application of sail technology on large LNG carriers. This patent combines the application characteristics of large LNG carriers to form a layout plan for sails on LNG carriers, which will further reduce carbon dioxide emissions from future large LNG carriers and achieve the long-term goal of zero carbon emissions.

[0004] The existing LNG ships are equipped with wing-shaped sail devices, which are placed on the main deck. Due to limitations such as the blind spot on the main deck, they need to be placed on the side. The wing-shaped sail is an integrated sail, and the sail surface cannot be retracted, but it can be rotated and laid down. The farthest end of the sail after being laid down cannot exceed the side of the LNG ship, which is why a deck rack is built to place the sail. If it is placed at other positions on the side, the sail will extend beyond the side of the hull after being laid down, which cannot meet the port requirements. The problem with the existing solution is that the sail is placed above the deck, which is too high, resulting in the need to lay it down during the bridge crossing, which affects the stability of the hull, and the standing sail has a greater impact on the navigation blind spot, which affects the navigation safety of multiple ships. Summary of the invention

[0005] In order to solve the above problems, the present invention provides a side-laying method for a LNG ship wing-shaped sail, which aims to reduce the height of the sail while ensuring that the farthest end of the sail does not exceed the side of the LNG ship after it is laid down. The technical solution adopted is: A method for laterally placing an airfoil sail on an LNG ship. The main decks on both sides of the hull are lower than the convex deck in the middle of the hull. The main deck and the convex deck are transitionally connected through an inclined deck. The inclined deck is inclined. There is a deck rack on the main deck. The height of the deck rack is lower than that of the convex deck. Part of the bottom of the deck rack is fixed on the main deck, and part is fixed on the inclined deck. The vertical height between the main deck and the convex deck is B, and the height of the deck rack is A, where 0.3B < A < B.

[0006] At the position corresponding to the deck rack, there is a sail surface support member fixed on the inclined deck. After the sail surface is laid down, the end of the sail surface falls on the sail surface support member.

[0007] The sail base is fixed on the deck rack. The sail surface support member consists of a sail surface support column and an end support block. The sail surface support column has two side panels, and a web is fixed between the two side panels. The center line of the web is perpendicular to the inclined deck, and its web width is 400 - 800 mm, and the side panel width is 200 - 400 mm. The upper surface of the end support block is arc-shaped, and the length of the end support block is twice the radius of the free end of the sail surface, and the height is equal to the distance from the free end of the sail surface to the inclined deck.

[0008] When the sail surface stops being used, first restore the sail surface to the front, then rotate the sail surface by an angle R, 0 < R < 45°. At this time, the outermost end of the sail surface just does not exceed the side of the hull, and then rotate it inward by 1° to ensure that the sail surface does not exceed the side of the hull. Then lay down the sail surface. The sail surface falls on the sail surface support column, and the free end of the sail surface falls on the end support block. The rotatable and foldable sail base can refer to Patent CN118618591A.

[0009] Wherein, R is the angle formed by the laid-down sail surface and the baseline.

[0010] For the above method for laterally placing an airfoil sail on an LNG ship, further, there is a support panel at the top of the sail surface support column. At the junction of the support panel and the sail surface, the bottom is connected to the inclined deck with an arc transition.

[0011] For the above method for laterally placing an airfoil sail on an LNG ship, further, when the sail surface is erected, the closest distance C between the bottom of the sail surface and the junction of the inclined deck and the convex deck, C > 2000 mm.

[0012] For the above method for laterally placing an airfoil sail on an LNG ship, further, the deck rack is a square box body, the top plate of the deck rack is square, and the side length of the top plate is D, and D is greater than the maximum value of the side length of the sail base.

[0013] For the above method for laterally placing an airfoil sail on an LNG ship, further, there is rubber pasted on the upper surface of the support panel.

[0014] In the above-mentioned method for laying the wing-shaped sail on its side for an LNG ship, further, the top of the sail support column is fixed at a distance of 1 / 5L from the free end of the sail, where L is the width of the sail.

[0015] The above-mentioned method for laying the wing-shaped sail on the side of the LNG ship further comprises the following steps: when the distance between the sail support column and the free end of the sail is greater than 3 meters, another sail support column is arranged between the free end of the sail and the sail support column.

[0016] In the above-mentioned method for laying the wing-shaped sail on the side of an LNG ship, further, the upper surface of the end point support block is affixed with rubber.

[0017] In the above-mentioned method for laying the wing-shaped sail on the side of an LNG ship, further, a hole is opened on the side plate of the deck frame for people to pass through.

[0018] In the above-mentioned method for laying the wing-shaped sail on its side for an LNG ship, further, reinforcing ribs are provided on the inner surfaces of the top plate and the side plates of the deck frame.

[0019] This patent adopts a method of tilting and laying down sails, and utilizes the structure and characteristics of the LNG ship itself to place the sail device in the area between the main deck and the inclined deck, thereby reducing the installation height of the sail, reducing the impact of the standing state of the sail on the blind area, reducing the size of the deck base, reducing the empty ship weight, simplifying the construction process, and at the same time, improving the safety of ship navigation. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the structure when the sail is erected, and a schematic diagram of the structure from the perspective of the top of the sail when the sail is laid down; Figure 2 It is a schematic diagram of the structure of the deck frame; Among them, 1-deck frame, 2-sail base, 3-sail surface, 5-end point support block, 6-sail surface support column, 7-main deck, 8-slanted deck, 9-convex deck, 11-top plate, 13-side plate, 14-hole for people to pass through. DETAILED DESCRIPTION

[0021] The present invention will be further described in conjunction with the accompanying drawings.

[0022] A method for placing a wing-shaped sail on a LNG ship sideways, such as Figure 1As shown in the figure, the main deck on both sides of the hull is lower than the convex deck in the middle of the hull. The main deck and the convex deck are connected by an inclined deck. The inclined deck is inclined. A deck rack is arranged on the main deck. The height of the deck rack is lower than that of the convex deck. Part of the bottom of the deck rack is fixed on the main deck and part is fixed on the inclined deck. The vertical height between the main deck and the convex deck is B, and the height of the deck rack is A, where 0.3B < A < B. The closest distance C between the sail surface 3 and the hull structure is such that C > 2000mm. The sail surface is an inextensible airfoil sail surface. The deck rack is arranged between the main deck 7 and the convex deck 9. At this time, when the sail stands, the maximum boundary exceeds the side boundary of the LNG ship.

[0023] At the position corresponding to the deck rack, a sail surface support member is provided. The sail surface support member is fixed on the inclined deck. After the sail surface is laid down, the end of the sail surface falls on the sail surface support member.

[0024] The sail base is fixed on the deck rack. The sail surface support member consists of a sail surface support column and an end support block. The sail surface support column has two side panels, and a web is fixed between the two side panels. The center line of the web is perpendicular to the inclined deck, and its web width is 400 - 800mm, and the side panel width is 200 - 400mm. The upper surface of the end support block is arc-shaped. The length of the end support block is twice the radius of the free end of the sail surface, and the height is equal to the distance from the free end of the sail surface to the inclined deck. A support panel is arranged at the top of the sail surface support column. At the connection between the support panel and the sail surface, the bottom is connected to the inclined deck by an arc transition.

[0025] When the sail surface stops being used, first restore the sail surface to the front, then rotate the sail surface by an angle R, where 0 < R < 45°. The farthest distance of the laid-down sail surface does not exceed the side boundary of the LNG ship. At this time, the outermost end of the sail surface just does not exceed the side of the hull. Then rotate it inward by 1° to ensure that the sail surface does not exceed the side of the hull, and then lay down the sail surface. The sail surface falls on the sail surface support column, and the free end of the sail surface falls on the end support block. The rotatable and foldable sail base can refer to Patent CN118618591A.

[0026] Wherein, R is the angle formed by the laid-down sail surface and the baseline.

[0027] As Figure 2 As shown in the figure, the deck rack is a square box. The top plate of the deck rack is square, and the side length of the top plate is D, where D is greater than the maximum value of the side length of the sail base. A hole 13 for people to pass through is provided in the structure of the side plate of the deck rack, which can facilitate the passage of personnel. Reinforcing ribs are arranged at equal intervals above the side plate 14, and the direction of the reinforcing ribs is inward. The large gusset plate 15 is a T-shaped gusset plate.

[0028] The sail surface 3 can rotate 360° during use. When it stops being used, it first returns to the front side, that is, the concave side faces the bow of the ship. Then the sail surface is rotated by an angle R, where 0 < R < 45°. At this time, the outermost end of the sail surface just does not exceed the ship's side. Then it is rotated inward by 1°. At this time, it can be ensured that the sail surface does not exceed the ship's side. At this time, the sail surface is lowered, and the sail surface falls on the sail surface end support structure 5 and the sail surface surface support structure 6. The purpose of doing this is to reduce the area of the deck occupied by the sail surface and also to place the sail device at the key points of the deck and the side deck.

[0029] The end support block 5 is arranged on the inclined deck 8, with a length that is 2 times the radius of the end of the airfoil sail. The web height is determined according to the distance from the end point of the sail surface to the inclined deck 8 after the sail surface is lowered. The panel width is 200 - 400 mm, the panel is arc-shaped, and a rubber pad is laid on it to protect the sail surface.

[0030] The top of the sail surface support column is fixed at 1 / 5L from the free end of the sail surface, where L is the width of the sail surface. When the distance between the sail surface support column and the free end of the sail surface is greater than 3 meters, another sail surface support column is set in the middle between the free end of the sail surface and the sail surface support column.

Claims

1. A method for laying a wing-shaped sail on a LNG ship, characterized in that: The main deck on both sides of the hull is lower than the convex deck in the middle of the hull. The main deck and the convex deck are transitionally connected by an inclined deck. The inclined deck is inclined. There is a deck rack on the main deck. The height of the deck rack is lower than that of the convex deck. Part of the bottom of the deck rack is fixed on the main deck and part is fixed on the inclined deck. The vertical height between the main deck and the convex deck is B, and the height of the deck rack is A, where 0.3B < A < B; A sail surface support member is provided at a position corresponding to the deck rack. The sail surface support member is fixed on the inclined deck. After the sail surface is laid down, the end of the sail surface falls on the sail surface support member; The sail base is fixed on the deck rack. The sail surface support member consists of a sail surface support column and an end support block. The sail surface support column has two side panels. A web is fixed between the two side panels. The center line of the web is perpendicular to the inclined deck. The width of the web is 400 - 800 mm, and the width of the side panel is 200 - 400 mm; The upper surface of the end support block is arc-shaped. The length of the end support block is twice the radius of the free end of the sail surface, and the height is equal to the distance from the free end of the sail surface to the inclined deck; When the sail surface stops being used, first restore the sail surface to the front, and then rotate the sail surface by an angle R, 0 < R < 45°. At this time, the outermost end of the sail surface just does not exceed the side of the hull. Then rotate it inward by 1° to ensure that the sail surface does not exceed the side of the hull. Lay down the sail surface. The sail surface falls on the sail surface support column, and the free end of the sail surface falls on the end support block; Wherein, R is the angle formed by the laid-down sail surface and the baseline.

2. A method for laying a wing-shaped sail on a LNG ship sideways according to claim 1, characterized in that: A support panel is provided at the top of the sail surface support column. At the junction of the support panel and the sail surface, the bottom is connected to the inclined deck by an arc transition.

3. The method for laying a wing-shaped sail on a LNG ship according to claim 1, characterized in that: When the sail surface is erected, the closest distance C from the bottom of the sail surface to the junction of the inclined deck and the convex deck, C > 2000 mm.

4. The method for laying a wing-shaped sail on a LNG ship according to claim 1, characterized in that: The deck rack is a square box. The top plate of the deck rack is square, and the side length of the top plate is D, and D is greater than the maximum value of the side length of the sail base.

5. The method for laying a wing-shaped sail on a LNG ship according to claim 1, characterized in that: Rubber is pasted on the upper surface of the support panel.

6. The method for laying a wing-shaped sail on a LNG ship according to claim 1, characterized in that: The top of the sail surface support column is fixed at 1 / 5L from the free end of the sail surface, where L is the width of the sail surface.

7. A method for laying a wing-shaped sail on a LNG ship sideways according to claim 6, characterized in that: When the distance between the sail surface support column and the free end of the sail surface is greater than 3 meters, another sail surface support column is provided in the middle between the free end of the sail surface and the sail surface support column.

8. The method for laying a wing-shaped sail on a LNG ship on the side according to claim 1, characterized in that: Rubber is pasted on the upper surface of the end support block.

9. A method for laying a wing-shaped sail on a LNG ship sideways according to claim 4, characterized in that: A hole for people to pass through is opened on the side plate of the deck rack.

10. The method for laying a wing-shaped sail on a LNG ship on the side according to claim 1, characterized in that: Reinforcing ribs are provided on the inner surfaces of the top plate and the side plates of the deck rack.

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