A method for sealing the air layer at the bottom of a ship

Abstract

A method for sealing the air layer at the bottom of a ship, comprising a sealing device, which is stuck in the opening of the outer plate of the hull to achieve a sealing effect. After the ship is launched, when it needs to be disassembled, the second rope is pulled to pull out the positioning pin, so that the top rod is separated from the bottom connecting piece, and then the bottom connecting piece, the top rod and the hull are separated. The present invention has a firm connection in the blocking area and has no hidden danger of being washed away by the air pressure test. Since the top rod of the supporting structure is located inside the hull, the greater the internal pressure, the better the sealing effect. The use of spring top pressure further strengthens the combination of the workpiece and the outer plate of the bottom of the ship to avoid air leakage and water leakage. Through the positioning pin, the tooling is tightly connected to the hull when needed, and when not needed, the positioning pin is pulled out to immediately separate the tooling from the hull.

Description

Technical Field

[0001] The invention belongs to the field of ship pressure stabilizing chamber design and construction, and in particular relates to a method for sealing the air layer at the bottom of a ship. Background Art

[0002] Ship air layer drag reduction technology is a technology that uses a compressor to pressurize air and pump it into the bottom of the ship, so that the contact area between the bottom plate and the seawater is reduced, thereby reducing the ship's navigation resistance. In ship air layer drag reduction technology, the bottom pressure stabilizing chamber is a bottom structure that allows gas to be ejected from the openings on the bottom of the ship to ensure gas pressure and allow compressed air to evenly form an air layer.

[0003] However, there are two reasons why the bottom openings need to be sealed before and after the ship is launched:

[0004] 1. It is necessary to conduct a tightness test on the pressure stabilizing chamber to avoid water and air leakage in the pressure stabilizing chamber during operation.

[0005] 2. Since the air compressor cannot work for a long time after launching, it is necessary to seal the openings on the bottom of the ship to prevent marine organisms from growing in the pressure stabilizing chamber and blocking the openings on the outer plate, affecting the jet effect.

[0006] Currently, the method of plugging the opening is to plug the bottom opening with corks. However, this solution has the following disadvantages:

[0007] 1. The cork may not be able to withstand the air pressure during the tightness test, resulting in sealing failure.

[0008] 2. After the ship is launched, the cork cannot be separated from the outer plate of the bottom of the ship and needs to be pulled out manually, which increases a lot of time and labor costs. Summary of the invention

[0009] In order to solve the above problems, the present invention proposes a method for sealing the air layer at the bottom of a ship with respect to the sealing problem of the pressure stabilizing chamber, and the technical solution adopted is:

[0010] A method for sealing the air layer at the bottom of a ship, comprising a sealing device, the sealing device comprising a bottom connecting piece and a top rod, the bottom connecting piece comprising a vertically arranged connecting tube, a trumpet-shaped fastener is fixed to the upper part of the connecting tube, the opening of the trumpet-shaped fastener is larger than the opening of the outer plate of the ship, the top opening of the connecting tube is located below the opening of the trumpet-shaped fastener, two first eye plates are symmetrically fixed to the top of the connecting tube, and a first positioning hole is opened on the cylinder body of the connecting tube.

[0011] Two second eye plates are symmetrically arranged on the top of the push rod, a second positioning hole is opened at the bottom of the push rod, a spring is fixed to the upper surface of the top of the push rod, the top width of the push rod is larger than the opening diameter of the trumpet-shaped fastener, the push rod is inserted into the connecting tube from top to bottom, the first eye plate and the second eye plate are connected by the first connecting rod and the second connecting rod, one end of the first connecting rod is rotatably connected to the second connecting rod by a pin shaft, and the other end is rotatably connected to the first eye plate by a pin shaft, the other end of the second connecting rod is rotatably connected to the second eye plate by a pin shaft, the first positioning hole is aligned with the second positioning hole and is fixed by a positioning pin.

[0012] After the push rod and the connecting tube are connected with the first connecting rod and the second connecting rod, the push rod is inserted into the opening of the hull outer plate, the spring contacts the top plate of the pressure stabilizing chamber, the push rod and the spring are compressed upward, the connecting tube is sleeved on the outside of the push rod and fixed by the positioning pin.

[0013] Before the ship is launched, the first rope is used to connect multiple bottom connectors in sequence, and the second rope is used to connect multiple positioning pins in sequence, so that the trumpet-shaped fastener is stuck in the opening of the hull outer plate to achieve a sealing effect. When disassembly is required, the second rope is pulled to pull out the positioning pin, so that the top rod is separated from the bottom connector, and then the bottom connector, the top rod and the hull are separated. Through the rope connection, the operator can remotely pull out the positioning pin to avoid underwater operations, and multiple tools can be connected in series to avoid falling into the sea for salvage.

[0014] The above-mentioned method for sealing the air layer at the bottom of a ship, further, has a first connecting hole at each end of the first connecting rod, a second connecting hole and a third connecting hole are sequentially opened at one end of the second connecting rod, the second connecting hole is located on the outside, and the third connecting hole is located on the inside, the first connecting hole and the third connecting hole at one end of the first connecting rod are rotatably connected by a pin, the first connecting hole at the other end is rotatably connected to the first eye plate by a pin, and the second connecting hole is rotatably connected to the second eye plate by a pin.

[0015] The above-mentioned method for sealing the air layer at the bottom of a ship is further characterized in that the diameter of the second connecting hole is larger than the diameter of the third connecting hole, the diameter of the second connecting hole is the same as the diameter of the second eye plate, and the diameter of the third connecting hole is the same as the diameter of the first connecting hole and the first eye plate.

[0016] The above-mentioned method for sealing the air layer at the bottom of a ship is further characterized in that a sealing rubber is arranged on the edge of the trumpet-shaped fastener.

[0017] The above-mentioned method for sealing the air layer at the bottom of a ship is further characterized in that a round hole is provided at the bottom of the connecting tube, and the first rope is connected to the round hole.

[0018] The present invention can reduce the testing cost of the ship's pressure stabilizing chamber and shorten the testing time. It is easy to manufacture and has a firm and reliable connection performance. It makes up for the problems of low sealing strength and difficult disassembly of the previous cork solution. It can also be recycled, and the performance does not significantly decrease with the increase in the number of uses. It is beneficial to environmental protection and helps to meet environmental protection standards. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the top rod structure from the front and top views;

[0020] Figure 2 1. It is a schematic diagram of the structure of the bottom connecting member from the side and top view;

[0021] Figure 3 is a schematic diagram of the first connecting rod structure;

[0022] Figure 4 is a schematic diagram of the second connecting rod structure;

[0023] Figure 5 is a schematic diagram of the positioning pin structure;

[0024] Figure 6 It is a schematic diagram of the sealing device installation process;

[0025] Figure 7 Is to use the schematic diagram;

[0026] Figure 8 It is a schematic diagram of the connection between the top rod and the bottom connecting piece;

[0027] Among them, 1-connecting tube, 2-top rod, 3-first eye plate, 4-second eye plate, 5-spring, 6-first connecting rod, 7-trumpet-shaped fastener, 8-first positioning hole, 9-second positioning hole, 10-second connecting hole, 11-third connecting hole, 12-second connecting rod. DETAILED DESCRIPTION

[0028] The present invention will be further described in conjunction with the accompanying drawings.

[0029] A method for sealing the airtightness of the bottom of a ship, such as Figure 8 As shown, there is a sealing device, which includes a bottom connecting member and a top rod, such as Figure 2 As shown, the bottom connecting member includes a vertically arranged connecting tube 1, a trumpet-shaped fastener 7 is fixed to the upper part of the connecting tube, the opening of the trumpet-shaped fastener is larger than the opening of the hull outer plate, the top opening of the connecting tube is located below the opening of the trumpet-shaped fastener, a first eye plate 3 is fixed to the top of the connecting tube, and a first positioning hole 8 is opened on the cylinder body of the connecting tube.

[0030] like Figure 1As shown, second eye plates 4 are symmetrically arranged on both sides of the top of the push rod, a second positioning hole 9 is opened at the bottom of the push rod, a spring 5 is fixed to the upper surface of the top of the push rod, and the top width of the push rod is larger than the opening diameter of the trumpet-shaped fastener. Therefore, after the push rod is inserted downward into the connecting tube, the two first eye plates on its top are just stuck in the opening position of the trumpet-shaped fastener to prevent the push rod from continuing to fall downward. The push rod is inserted into the connecting tube from top to bottom, and the first eye plate and the second eye plate are connected by the first connecting rod and the second connecting rod. One end of the first connecting rod is rotatably connected to the second connecting rod through a pin shaft, and the other end is rotatably connected to the first eye plate through a pin shaft. The other end of the second connecting rod is rotatably connected to the second eye plate through a pin shaft. The first positioning hole is aligned with the second positioning hole, and a positioning pin (such as Figure 5 shown) fixed.

[0031] like Figure 3 , 4 As shown, a first connecting hole is opened at each end of the first connecting rod, a second connecting hole 10 and a third connecting hole 11 are opened in sequence at one end of the second connecting rod, the second connecting hole is located on the outside of the second connecting rod, one of the first connecting holes is rotatably connected to the third connecting hole through a pin, the other first connecting hole is rotatably connected to the first eye plate through a pin, and the second connecting hole is rotatably connected to the second eye plate through a pin.

[0032] After the push rod and the connecting tube are connected with the first connecting rod and the second connecting rod, the push rod is inserted into the opening of the hull outer plate. The opening of the hull outer plate is larger than the top width of the push rod. The spring contacts the top plate of the pressure stabilizing chamber, compresses the push rod and the spring upward, and the connecting tube is sleeved on the outside of the push rod and fixed by the positioning pin.

[0033] like Figure 6 , 7 As shown, before the ship is launched, a plurality of bottom connectors are connected in sequence using a first rope, and a plurality of positioning pins are connected in sequence using a second rope; when disassembly is required, the second rope is pulled to pull out the positioning pins, so that the top rod is separated from the bottom connector, and then the bottom connector, the top rod and the hull are separated.

[0034] When the push rod touches the dome of the pressure-stabilizing chamber, the compressed top spring provides a downward force for the entire assembly. The overall sealing device structure forms an action force and an action relationship on the pressure-stabilizing chamber, so that the entire tooling is firmly supported on the bottom plate of the ship. The overall structure forms an action force and an action relationship on the bottom plate of the ship.

Claims

1. A method for sealing the air layer at the bottom of a ship, characterized in that: A sealing device is provided, the sealing device comprising a bottom connecting piece and a top rod (2), the bottom connecting piece comprising a vertically arranged connecting tube (1), a trumpet-shaped fastener (7) being fixed on the upper part of the connecting tube (1), the trumpet-shaped fastener (7) having an opening at the center, the outer diameter of the trumpet-shaped fastener (7) being larger than the opening of the outer plate of the hull, the top opening of the connecting tube (1) being located below the opening of the trumpet-shaped fastener (7), two first eye plates (3) being symmetrically fixed on the top of the connecting tube (1), and a first positioning hole (8) being opened on the body of the connecting tube (1); Two second eye plates (4) are symmetrically arranged on the top of the push rod (2), a second positioning hole (9) is opened at the bottom of the push rod (2), a spring (5) is fixed on the upper surface of the top of the push rod (2), the top width of the push rod (2) is greater than the opening diameter of the trumpet-shaped fastener (7), the push rod (2) is inserted into the connecting tube (1) from top to bottom, the first eye plate (3) and the second eye plate (4) are connected through the first connecting rod (6) and the second connecting rod (12), one end of the first connecting rod (6) is rotatably connected to the second connecting rod (12) through a pin shaft, and the other end is rotatably connected to the first eye plate (3) through a pin shaft, the other end of the second connecting rod (12) is rotatably connected to the second eye plate (4) through a pin shaft, the first positioning hole (8) and the second positioning hole (9) are aligned and fixed by a positioning pin; After the push rod (2) and the connecting tube (1) are connected by the first connecting rod (6) and the second connecting rod (12), the push rod (2) is inserted into the opening of the outer plate of the hull, the spring (5) contacts the top plate of the pressure stabilizing chamber, the push rod (2) and the spring (5) are compressed upward, and the connecting tube (1) is sleeved on the outside of the push rod (2) and fixed by a positioning pin; Before the ship is launched, a plurality of bottom connecting members are connected in sequence using a first rope, and a plurality of positioning pins are connected in sequence using a second rope; when disassembly is required, the second rope is pulled to pull out the positioning pins, so that the top rod (2) is separated from the bottom connecting member, and the bottom connecting member, the top rod and the hull are separated.

2. A method for sealing the air layer at the bottom of a ship according to claim 1, characterized in that: The first connecting rod (6) has a first connecting hole at each end, and the second connecting rod (12) has a second connecting hole (10) and a third connecting hole (11) at one end, the second connecting hole (10) is located on the outside, and the third connecting hole (11) is located on the inside. The first connecting hole at one end of the first connecting rod (6) is rotatably connected to the third connecting hole (11) via a pin, the first connecting hole at the other end is rotatably connected to the first eye plate (3) via a pin, and the second connecting hole (10) is rotatably connected to the second eye plate (4) via a pin.

3. A method for sealing the air layer at the bottom of a ship according to claim 2, characterized in that: The diameter of the second connection hole (10) is greater than that of the third connection hole (11); the diameter of the second connection hole (10) is the same as the diameter of the second eye plate (4); and the diameter of the third connection hole (11) is the same as the diameter of the first connection hole and the first eye plate (3).

4. A method for sealing the air layer at the bottom of a ship according to claim 1, characterized in that: The opening edge of the trumpet-shaped fastener (7) is provided with sealing rubber.

5. A method for sealing the air layer at the bottom of a ship according to claim 1, characterized in that: A circular hole is arranged at the bottom of the connecting tube (1), and the first rope is connected to the circular hole.

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