Tightness sealing device for ship bottom air layer

Abstract

A sealing device for a ship bottom air layer is provided with a bottom connecting piece and an ejector rod, the bottom connecting piece and the ejector rod are connected through a first connecting rod and a second connecting rod, a spring is fixed to the top of the ejector rod, the top of the ejector rod extends into a hole of a ship body outer plate, the ejector rod and the bottom connecting piece are locked through a positioning pin, and a horn-shaped fastener is clamped in the hole of the ship body outer plate. The sealing effect is achieved. After the ship is launched, when the ship needs to be detached, the second rope is pulled to pull out the positioning pin, the ejector rod is separated from the bottom connecting piece, and then the bottom connecting piece and the ejector rod are separated from the ship body. Connection is firm in a plugging area, and the hidden danger of being washed away by an air pressure test is avoided. As the supporting structure ejector rod is located on the inner side of the ship body, the larger the internal pressure is, the better the sealing effect is. And the spring is used for jacking, so that the combination working on the ship bottom outer plate is further enhanced, and air leakage and water leakage are avoided. Through the positioning pins, the tool is tightly connected with the ship body when needed, and when not needed, the positioning pins are pulled out, and the tool can be separated from the ship body immediately.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of ship pressure chamber design and construction, and particularly relates to a device for sealing the air layer of a ship bottom. BACKGROUND

[0002] The air layer drag reduction technology for a ship is a technology of reducing the contact area between a ship bottom plate and seawater by using a compressor to inject pressurized air into the ship bottom, so as to reduce the ship sailing resistance. In the air layer drag reduction technology for a ship, the ship bottom pressure chamber is a ship bottom structure for making the air from the ship bottom opening to be sprayed out, so as to ensure the air pressure and make the compressed air uniformly form an air layer.

[0003] However, before and after the ship is launched, there are two reasons for sealing the ship bottom opening:

[0004] 1. The pressure chamber tightness test needs to be performed to avoid water and air leakage of the pressure chamber during the operation.

[0005] 2. After the ship is launched, the air compressor cannot work for a long time, and the ship bottom opening needs to be sealed to avoid the growth of marine organisms in the pressure chamber, so as to block the outer plate opening and affect the air injection effect.

[0006] At present, the method for sealing the opening is to use a soft plug to seal the ship bottom opening. However, this scheme has the following disadvantages:

[0007] 1. The soft plug may not withstand the air pressure during the tightness test, resulting in sealing failure.

[0008] 2. After the ship is launched, the soft plug cannot be separated from the ship bottom outer plate, and needs to be manually pulled out, which increases the time and labor cost. SUMMARY

[0009] To solve the above problems, the present application proposes a device for sealing the air layer of a ship bottom in view of the sealing problem of the pressure chamber, and the technical scheme adopted is as follows:

[0010] The device for sealing the air layer of a ship bottom comprises a bottom connecting piece and a top rod, the bottom connecting piece comprises a vertically arranged connecting cylinder, a horn-shaped fastener is fixed to the upper part of the connecting cylinder, the horn-shaped fastener is provided with an opening in the center, the outer diameter of the horn-shaped fastener is greater than the opening of the ship outer plate, the opening at the top of the connecting cylinder is located below the opening of the horn-shaped fastener, two first eye plates are symmetrically fixed to the top of the connecting cylinder, and a first positioning hole is formed in the cylinder body of the connecting cylinder.

[0011] The top rod top is symmetrically provided with two second eye plates, the top rod bottom is provided with a second positioning hole, the top rod top surface is fixed with a spring, the top rod top width is greater than the opening diameter of the horn-shaped fastener, the top rod is inserted into the connecting barrel from top to bottom, the first eye plate and the second eye plate are connected through the first connecting rod and the second connecting rod, one end of the first connecting rod is connected with the second connecting rod, the other end is connected with the first eye plate, the other end of the second connecting rod is connected with the second eye plate, the first positioning hole is aligned with the second positioning hole, and the alignment is fixed through the bolt.

[0012] After the top rod and the connecting barrel are connected through the first connecting rod and the second connecting rod, the top rod is inserted into the ship body outer plate opening, the spring is in contact with the stabilizing chamber top plate, the top rod and the spring are compressed upward, the connecting barrel is sleeved on the outside of the top rod, and the connecting barrel is fixed through the positioning pin.

[0013] Before the ship is launched, a plurality of bottom connecting pieces are connected in sequence through the first rope, and a plurality of positioning pins are connected in sequence through the second rope; when disassembly is required, the positioning pin is pulled out through the second rope, so that the top rod is separated from the bottom connecting piece, and then the bottom connecting piece is separated from the top rod and the ship body. Through the rope connection, the operator can remotely pull out the positioning pin, avoid underwater operation, and connect a plurality of the tooling in series to avoid salvage at sea.

[0014] The above-mentioned ship bottom gas layer airtight sealing device is further provided with a first connecting hole at each end of the first connecting rod, a second connecting hole and a third connecting hole are sequentially arranged at one end of the second connecting rod, the second connecting hole is located at the outer side, the third connecting hole is located at the inner side, the first connecting hole at one end of the first connecting rod is connected with the third connecting hole, the first connecting hole at the other end is connected with the first eye plate, and the second connecting hole is connected with the second eye plate.

[0015] The above-mentioned ship bottom gas layer airtight sealing device is further provided with a first connecting hole at each end of the first connecting rod, a second connecting hole and a third connecting hole are sequentially arranged at one end of the second connecting rod, the second connecting hole is located at the outer side, the third connecting hole is located at the inner side, the first connecting hole at one end of the first connecting rod is connected with the third connecting hole, the first connecting hole at the other end is connected with the first eye plate, and the second connecting hole is connected with the second eye plate.

[0016] The above-mentioned ship bottom gas layer airtight sealing device is further provided with a first connecting hole at each end of the first connecting rod, a second connecting hole and a third connecting hole are sequentially arranged at one end of the second connecting rod, the second connecting hole is located at the outer side, the third connecting hole is located at the inner side, the first connecting hole at one end of the first connecting rod is connected with the third connecting hole, the first connecting hole at the other end is connected with the first eye plate, and the second connecting hole is connected with the second eye plate.

[0017] The above-mentioned ship bottom gas layer airtight sealing device is further provided with a first connecting hole at each end of the first connecting rod, a second connecting hole and a third connecting hole are sequentially arranged at one end of the second connecting rod, the second connecting hole is located at the outer side, the third connecting hole is located at the inner side, the first connecting hole at one end of the first connecting rod is connected with the third connecting hole, the first connecting hole at the other end is connected with the first eye plate, and the second connecting hole is connected with the second eye plate.

[0018] The above-mentioned ship bottom gas layer airtight sealing device is further provided with a first connecting hole at each end of the first connecting rod, a second connecting hole and a third connecting hole are sequentially arranged at one end of the second connecting rod, the second connecting hole is located at the outer side, the third connecting hole is located at the inner side, the first connecting hole at one end of the first connecting rod is connected with the third connecting hole, the first connecting hole at the other end is connected with the first eye plate, and the second connecting hole is connected with the second eye plate.

[0019] This invention reduces testing costs and shortens testing time for ship pressure stabilizing chambers. It is also easy to manufacture and provides a strong and reliable connection. It overcomes the problems of low sealing strength and difficult disassembly associated with previous cork plug solutions. Furthermore, it is recyclable, and its performance does not significantly decrease with repeated use. This is environmentally friendly and helps meet environmental standards. Attached Figure Description

[0020] Figure 1 These are schematic diagrams of the top rod structure from the front and top views;

[0021] Figure 2 These are side and top views of the bottom connector structure.

[0022] Figure 3 This is a schematic diagram of the first link structure;

[0023] Figure 4 This is a schematic diagram of the second link structure;

[0024] Figure 5 This is a schematic diagram of the positioning pin structure;

[0025] Figure 6 This is a schematic diagram of the sealing device installation process;

[0026] Figure 7 This is a diagram;

[0027] Figure 8 This is a schematic diagram showing the connection between the top rod and the bottom connector;

[0028] Among them, 1-connecting cylinder, 2-top rod, 3-first eye plate, 4-second eye plate, 5-spring, 6-first connecting rod, 7-flare-shaped fastener, 8-first positioning hole, 9-second positioning hole, 10-second connecting hole, 11-third connecting hole, 12-second connecting rod. Detailed Implementation

[0029] The invention will be further described with reference to the accompanying drawings.

[0030] A device for sealing the air gap at the bottom of a ship, such as Figure 8 As shown, there is a sealing device, which includes a bottom connector and a top rod, such as... Figure 2 As shown, the bottom connector includes a vertically arranged connecting cylinder 1, a horn-shaped fastener 7 fixed on the upper part of the connecting cylinder, the opening of the horn-shaped fastener being larger than the opening on the outer plate of the ship, the top opening of the connecting cylinder being located below the opening of the horn-shaped fastener, a first eye plate 3 fixed on the top of the connecting cylinder, and a first positioning hole 8 opened on the cylinder body of the connecting cylinder.

[0031] like Figure 1As shown, the second eye plate 4 is symmetrically arranged on both sides of the top rod top, a second positioning hole 9 is opened at the bottom of the top rod, and a spring 5 is fixed on the top surface of the top rod top. The width of the top rod top is greater than the opening diameter of the horn-shaped fastener, so that when the top rod is inserted into the connecting cylinder, the two first eye plates on the top rod top are just clamped in the opening position of the horn-shaped fastener, avoiding the top rod from continuing to drop down. The first eye plate and the second eye plate are connected through the first connecting rod and the second connecting rod. One end of the first connecting rod is connected with the second connecting rod, and the other end is connected with the first eye plate. The other end of the second connecting rod is connected with the second eye plate. The first positioning hole is aligned with the second positioning hole, and is fixed through a positioning pin (as shown in Figure 5 ).

[0032] As shown in Figure 3 , 4 , the first connecting rod has a first connecting hole opened at each end, and the second connecting rod has a second connecting hole 10 and a third connecting hole 11 opened at one end in sequence. The second connecting hole is located on the outer side of the second connecting rod. One of the first connecting holes is connected with the third connecting hole, and the other first connecting hole is connected with the first eye plate. The second connecting hole is connected with the second eye plate

[0033] After the top rod and the connecting cylinder are connected through the first connecting rod and the second connecting rod, the top rod is inserted into the ship plate opening. The ship plate opening is larger than the width of the top rod top, the spring is in contact with the top plate of the pressure stabilizing chamber, the top rod and the spring are compressed upward, the connecting cylinder is sleeved outside the top rod, and the connecting cylinder is fixed through the positioning pin.

[0034] As shown in Figure 6 , 7 , before the ship is launched, a plurality of bottom connecting members are connected in sequence by using a first rope, and a plurality of positioning pins are connected in sequence by using a second rope. When disassembly is needed, the positioning pins are pulled out by pulling the second rope, so that the top rod is separated from the bottom connecting member, and then the bottom connecting member is separated from the top rod and the ship bottom plate.

[0035] When the top rod touches the dome of the pressure stabilizing chamber, the top spring provides a downward force for the entire assembly, the structure of the overall sealing device forms a force on the pressure stabilizing chamber, and the force relationship makes the entire tool firmly supported on the ship bottom plate. The overall structure forms a force on the ship bottom plate, and the force relationship.

Claims

1. A device for sealing the air layer under the hull of a ship, characterized in that The utility model discloses a bottom connecting piece and a top rod (2), the bottom connecting piece includes the vertically arranged connecting barrel, the upper portion of connecting barrel is fixed with the horn fastener (7), the center of horn fastener is provided with the opening, the outer diameter of horn fastener is greater than the hull plating opening, the top opening of connecting barrel is located below the opening of horn fastener, and the top of connecting barrel is fixed with two first eye plates (3) symmetrically, and the barrel body of connecting barrel is provided with the first positioning hole (8) on the top; The top rod is provided with two second eye plates (4) symmetrically on the top, and the bottom of top rod is provided with a second positioning hole (9), and the top surface of top rod top is fixed with spring (5), and the top width of top rod is greater than the opening diameter of horn fastener, and top rod is inserted into connecting barrel from top to bottom, and first eye plate and second eye plate are connected through first connecting rod (6) and second connecting rod (12), one end of first connecting rod is connected with second connecting rod, and the other end is connected with first eye plate, and the other end of second connecting rod is connected with second eye plate, and first positioning hole is aligned with second positioning hole, and is fixed through the bolt.

2. A device for sealing the air layer under the hull of a ship according to claim 1, characterized in that The both ends of first connecting rod are provided with first connecting holes respectively, and one end of second connecting rod is provided with second connecting hole (10) and third connecting hole (11) in proper order, and second connecting hole is located on the outside, and third connecting hole is located on the inside, and the first connecting hole of one end of first connecting rod is connected with third connecting hole, and the first connecting hole of the other end is connected with first eye plate, and second connecting hole is connected with second eye plate.

3. A device for sealing the air layer under the hull of a ship according to claim 2, characterized in that The diameter of second connecting hole is greater than the diameter of third connecting hole, and the diameter of second connecting hole is same with the diameter of second eye plate, and the diameter of third connecting hole is same with the diameter of first connecting hole and first eye plate.

4. A device for sealing the air layer under the hull of a ship according to claim 1, characterized in that The edge of the opening of horn fastener is provided with sealing rubber.

5. A device for sealing the air layer under the hull of a ship according to claim 1, characterized in that The both sides of the top opening of connecting barrel are provided with two first eye plates symmetrically, and the both sides of the top of top rod are provided with two second eye plates symmetrically.

6. A device for sealing the air layer under the hull of a ship according to claim 1, characterized in that The bottom of connecting barrel is provided with a round hole, and first rope is connected on the round hole.

7. A device for sealing the air layer under the hull of a ship according to claim 1, characterized in that The first positioning hole has two.

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