A water curtain device for LNG leakage protection at a marine LNG filling station

Abstract

The present invention relates to a water curtain device for a ship-mounted LNG filling station for LNG leakage protection, comprising a structural member, a pipe rack, and a water curtain pipe; the structural member is arranged on the side of the ship hull, and the pipe rack is hinged to the structural member; the water curtain pipe is horizontally fixed to the pipe rack and can be flipped around the structural member together with the pipe rack so as to be in two states: extended from the side of the ship and retracted from the side of the ship; the water curtain pipe is provided with at least one row of strip-shaped openings along the length direction of the water curtain pipe, and the long direction of the strip-shaped openings is also along the length direction of the water curtain pipe. The present invention optimizes the circular openings of the water curtain pipe into strip-shaped openings, making the water curtain pipe less prone to clogging, and increasing the area of ​​the water curtain covering the outer plate, thereby reducing safety hazards; the water curtain pipe with strip-shaped openings is more convenient to manufacture than the circular opening; the water curtain pipe is made into a retractable type, which can be placed outside the ship when in operation and retracted into the ship when not in operation, without increasing the width of the ship or affecting the appearance.

Description

Technical Field

[0001] The invention relates to a water curtain device of a ship-mounted LNG filling station for LNG leakage protection, belonging to the technical field of LNG power and transport ships. Background Art

[0002] According to regulatory requirements, dual-fuel vessel LNG bunkering stations must deploy a water curtain during LNG bunkering to prevent LNG leakage and freezing damage to the hull plating due to low temperatures. This curtain is typically created by connecting firefighting water to stainless steel pipes located outside the plating. The water flows through fine circular holes in the pipes to the plating, forming a water curtain to prevent freezing damage in the event of an LNG leak.

[0003] However, this approach has three disadvantages:

[0004] First, the stainless steel water curtain pipe has been hanging outside the outer plate, which is not beautiful and is equivalent to increasing a part of the ship's width.

[0005] Secondly, the fire water flows out through fine circular holes, but in the long run, the fine circular holes will be blocked by some impurities. When flushing the water curtain pipe, it is not easy to flush out the impurities due to the small circular holes, and the circular holes are fine and dense, which is also more troublesome for the manufacture of the pipe.

[0006] Third, when the fire water flows out through the circular holes, no fire water will flow out of the parts between the circular holes, and the parts between the corresponding circular holes on the outer plate are not covered, which may pose a safety hazard to this part of the outer plate. Summary of the Invention

[0007] The present invention aims to address the three shortcomings mentioned above. To address the first drawback, the water curtain pipe is designed to be retractable. When not filling LNG, the water curtain pipe is stored inside the vessel. Before filling, the water curtain pipe is lowered and positioned outside the vessel. Once filling is complete, it is retracted inside. To address the second and third shortcomings, the circular openings in the water curtain pipe are replaced with strip-shaped openings. This reduces clogging, facilitates flushing, increases the coverage area of ​​the outer plate, and simplifies pipe manufacturing.

[0008] The present invention adopts the following technical solutions:

[0009] A water curtain device for a marine LNG filling station for LNG leakage protection includes a structural member 4, a pipe rack 3, and a water curtain pipe 1; the structural member 4 is arranged on the side of the hull, and the pipe rack 3 is hinged to the structural member 4; the water curtain pipe 1 is horizontally fixed to the pipe rack 3 and can be flipped around the structural member 4 together with the pipe rack 3, so that it can be in two states: extended from the side and retracted from the side; the water curtain pipe 1 is provided with at least one row of strip openings along the length direction of the water curtain pipe, and the long direction of the strip openings is also along the length direction of the water curtain pipe 1.

[0010] Preferably, on the water curtain tube 1, positions between adjacent strip openings are staggered by a small distance to form another row of strip openings, and the other row of strip openings approaches or completely covers the positions between the adjacent strip openings.

[0011] Preferably, a buckle 5 is provided on the outer side of the structural member 4 , and when the water curtain pipe is lowered, the buckle 5 makes the pipe rack 3 and the structural member 4 perpendicular.

[0012] Preferably, a circular hole is provided on the structural member. After the water curtain pipe is recovered into the ship, the pipe rack 3 and the structural member 4 are fixed and positioned by bolts passing through the circular hole. At this time, the pipe rack 3 is not outside the ship and does not increase the ship width.

[0013] Preferably, two or more pipe racks 3 are provided.

[0014] Preferably, it further comprises a water supply pipe 2, one end of the water supply pipe 2 is connected to the water curtain pipe 1, and the other end is connected to a fire water source.

[0015] Furthermore, the water supply pipe 2 is a hose.

[0016] The beneficial effects of the present invention are:

[0017] 1) The circular opening of the water curtain pipe is optimized to a strip opening, making it less likely to be blocked and increasing the area covered by the water curtain to the outer plate, reducing safety hazards;

[0018] 2) The water curtain tube with strip opening is easier to manufacture than the circular opening;

[0019] 3) The water curtain pipe is made into a retractable type, which can be placed outside the boat when working and retracted into the boat when not working, without increasing the width of the boat and affecting the appearance. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of a water curtain device for LNG leakage protection at a marine LNG filling station according to the present invention.

[0021] Figure 2 yes Figure 1 Center AA view (side view of water curtain tube).

[0022] Figure 3 yes Figure 2 Enlarged view of area B (schematic diagram of the bar opening).

[0023] Figure 4 It is a comparative diagram of the water curtain pipe in the recovery state and the working state.

[0024] In the figure, 1. Water curtain pipe, 2. Water supply pipe, 3. Pipe rack, 4. Structural parts, 5. Clip. DETAILED DESCRIPTION

[0025] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0026] See also Figure 1 As can be seen in the figure, the circular opening of the water curtain tube has been changed to a strip opening. Figure 2 To improve the side view of the water curtain tube, Figure 3 Schematic diagram of strip opening.

[0027] A water curtain device for a marine LNG filling station for LNG leakage protection includes a structural member 4, a pipe rack 3, and a water curtain pipe 1; the structural member 4 is arranged on the side of the hull, and the pipe rack 3 is hinged to the structural member 4; the water curtain pipe 1 is horizontally fixed to the pipe rack 3 and can be flipped around the structural member 4 together with the pipe rack 3, so that it can be in two states: extended from the side and retracted from the side; the water curtain pipe 1 is provided with at least one row of strip openings along the length direction of the water curtain pipe, and the long direction of the strip openings is also along the length direction of the water curtain pipe 1.

[0028] In this embodiment, see Figure 1 and 3 On the water curtain tube 1, the positions between adjacent strip openings are staggered by a small distance to open another row of strip openings, and the other row of strip openings approaches or completely covers the positions between the adjacent strip openings.

[0029] In this embodiment, see Figure 4 A buckle 5 is provided on the outside of the structural member 4. When the water curtain pipe is lowered, the buckle 5 makes the pipe rack 3 and the structural member 4 perpendicular.

[0030] In this embodiment, see Figure 4 A circular hole is provided on the structural member. After the water curtain pipe is recovered into the ship, the pipe rack 3 and the structural member 4 are fixed and positioned by bolts passing through the circular hole. At this time, the pipe rack 3 is not outside the ship and does not increase the ship width.

[0031] In this embodiment, see Figure 1 , the pipe rack 3 is provided with two or more.

[0032] In this embodiment, see Figure 1 , and also includes a water supply pipe 2, one end of which is connected to the water curtain pipe 1, and the other end is connected to the fire water source.

[0033] In this embodiment, see Figure 1 , the water supply pipe 2 is a hose.

[0034] As can be seen from the figure, there are still two rows of openings, and the angles of the openings remain unchanged, but the circular openings are changed to strip openings. The opening area is larger and less likely to be blocked. The area between the strip holes is also smaller, so the area of ​​the outer plate covered by the corresponding water curtain is larger, and the pipes with strip openings are easier to manufacture.

[0035] The pipe rack 3 is no longer welded to the outer plate, but is connected to the structural member 4 by bolts. When not in operation, the water curtain pipe is recovered inside the ship. Before filling LNG, the water curtain pipe is lowered, and the pipe rack 3 is made perpendicular to the structural member 4 by means of the buckle 5. The fire water is then connected to form a water curtain. At this time, the water curtain pipe is in operation. Figure 4 After filling, the fire water is disconnected and the water curtain pipe is retracted into the ship. The pipe holder 3 is secured by inserting a pin into the circular hole on the structural member 4. The water curtain pipe is now retracted. This prevents the pipe holder 3 from remaining permanently outside the ship, increasing the ship's width and affecting its aesthetics.

[0036] The present invention optimizes the circular opening of the water curtain pipe to a strip-shaped opening, making it less prone to clogging and increasing the area of ​​the water curtain covering the outer plate, reducing safety hazards. Strip-shaped water curtain pipes are easier to manufacture than circular openings. The water curtain pipe is also retractable, placed outside the vessel when in operation and retracted inside when not in operation, without increasing the vessel's width or affecting its aesthetics.

[0037] The above are preferred embodiments of the present invention. Those skilled in the art may make various changes or improvements based on the above. Without departing from the overall concept of the present invention, these changes or improvements should fall within the scope of protection claimed by the present invention.

Claims

1. A water curtain device for LNG leakage protection at a marine LNG filling station, characterized by: It includes structural parts (4), pipe racks (3), and water curtain pipes (1); The structural member (4) is provided on the side of the hull, and the pipe rack (3) is hinged to the structural member (4); The water curtain pipe (1) is horizontally fixed on the pipe rack (3) and can be turned around the structural member (4) together with the pipe rack (3) so as to be in two states: extended to the side and retracted to the side; The water curtain tube (1) is provided with at least two rows of strip-shaped openings along the length direction of the water curtain tube, and the long direction of the strip-shaped openings is also along the length direction of the water curtain tube (1); On the water curtain tube (1), positions between adjacent strip openings are staggered by a small distance to form another row of strip openings, and the other row of strip openings approaches or completely covers the positions between the adjacent strip openings; A buckle (5) is provided on the outer side of the structural member (4); when the water curtain pipe is lowered, the buckle (5) enables the pipe rack (3) to be perpendicular to the structural member (4); A circular hole is provided on the structural member. After the water curtain pipe is recovered inside the ship, the pipe rack (3) and the structural member (4) are fixed and positioned by bolts passing through the circular hole. At this time, the pipe rack (3) is not outside the ship and does not increase the ship width.

2. The water curtain device for LNG leakage protection at a marine LNG filling station according to claim 1, characterized in that: The pipe rack (3) is provided in plurality.

3. The water curtain device for LNG leakage protection at a marine LNG filling station according to claim 1, characterized in that: It also includes a water supply pipe (2), one end of which is connected to the water curtain pipe (1) and the other end of which is connected to a fire water source.

4. The water curtain device for LNG leakage protection at a marine LNG filling station according to claim 3, characterized in that: The water supply pipe (2) is a hose.

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