Ventilation groove structure of ship ballast tank

Abstract

The utility model discloses a ventilation groove structure of a ship ballast tank, which comprises a ventilation groove structural body, the ventilation groove structural body is fixedly connected with a cargo hold bottom plate and a ballast tank side wall and extends outwards from a bottom ballast tank to a side ballast tank area, and the inner side end of the ventilation groove structural body is communicated with the bottom ballast tank; the air pipe is vertically fixed in the side ballast tank, the upper section of the air pipe upwards penetrates out of the deck and is communicated with the outside atmosphere, and the lower section of the air pipe is fixedly connected and communicated with the outer side end of the ventilation groove structural body. Air at the top of the ballast tank can completely permeate, and a free liquid level cannot be formed in the ballast tank, so that ship stability is facilitated; the ballast tanks can be fully filled, so that the number of the ballast tanks of the ship can be reduced, and more cargo carrying space is reserved; the top area of the ballast tank is filled with water all the time, and the tank wall cannot be exposed in humid air and is not prone to corrosion; no residual air is left in the ballast tank, and extra pressure cannot be generated on the bulkhead due to thermal expansion and cold contraction of gas when the environment temperature changes.

Description

Technical Field

[0001] The utility model relates to the technical field of ships, in particular to a ventilating groove structure of a ship's ballast tank. Background Art

[0002] To ensure ship stability, multiple ballast tanks are required to hold ballast water to adjust the ship's buoyancy. To ensure smooth air evacuation when the ballast tanks are filled, each ballast tank must be equipped with a vent pipe leading to an open area. This vent pipe should be located at the highest point of the tank to ensure complete air evacuation. Due to ship stability requirements, some ballast tanks are located below the cargo hold, with their tops completely covered by the hold. Installing an air pipe on top of this ballast tank would require it to be inside the hold, hindering cargo loading. Furthermore, if the pipe is located inside the hold, ballast water could leak into the hold through the pipe if damaged. Hull structures on the cargo hold floor must be located below the floor to ensure a smooth interior for easy cargo loading and unloading. Existing air pipe designs involve installing transverse air pipes on the ballast tank sidewalls, first leading to the side area and then upward to the open area. However, the excessive diameter of these air pipes, passing through hull structures, would compromise hull strength. Therefore, transverse air pipes must be located below the cargo hull structures. At this time, the air pipe is not at the highest point of the ballast tank. A large amount of air has accumulated on the top of the ballast tank and cannot be discharged.

[0003] The disadvantage of the existing technology is that the height of the transverse air duct is limited by the structural components under the cargo hold floor and cannot be arranged at the highest point of the ballast tank. A large amount of air accumulates on the top of the ballast tank and cannot be discharged.

[0004] The resulting disadvantages are as follows:

[0005] When a ship is sailing, the ballast water in the ballast tank sloshes to form a free liquid surface, generating a large amount of free torque, which affects the stability of the ship.

[0006] The ballast tanks cannot be filled with water, resulting in the actual ballast volume of the ship being less than the design requirement, and the buoyancy of the ship cannot be adjusted to the design condition;

[0007] The top of the ballast tank is exposed to alternating air and water conditions for a long time, and the bulkhead is prone to corrosion;

[0008] The air trapped on top expands and contracts as the temperature changes, putting pressure on the ballast tanks and causing the hull panels to deform. Utility Model Content

[0009] The purpose of the utility model is to provide a venting groove structure for a ship's ballast tank, so as to overcome the defects in the prior art.

[0010] The purpose of the utility model is achieved as follows: a venting groove structure for a ship ballast tank, comprising:

[0011] A vent structure, which is fixedly connected to the cargo hold floor and the ballast tank sidewalls. The vent structure is generally strip-shaped and extends outward from the bottom ballast tank to the side ballast tank area. The vent structure is a hollow tubular structure, and its inner end is connected to the bottom ballast tank;

[0012] The air pipe is vertically fixed in the side ballast tank, the upper section of which passes upward through the deck and is connected to the outside atmosphere, and the lower section is fixedly connected to and connected to the outer end of the air vent structure.

[0013] Furthermore, it also includes a sub-bottom plate structural member fixedly connected to the cargo hold bottom plate, the sub-bottom plate structural member is provided with a through hole, the air vent structure passes through the through hole of the sub-bottom plate structural member of the cargo hold bottom plate, and a gap is left between the through hole of the sub-bottom plate structural member.

[0014] Furthermore, the air vent structure is composed of a vertical steel plate and a transverse steel plate fixedly combined with each other, the vertical steel plate is arranged vertically and its upper edge is fixedly connected to the cargo hold bottom plate, the transverse steel plate is arranged horizontally and one side thereof is fixedly connected to the ballast tank side wall, and the other side of the transverse steel plate is vertically fixedly connected to the lower edge of the vertical steel plate, the transverse steel plate, vertical steel plate, cargo hold bottom plate and ballast tank side wall are combined to form the inner cavity of the air vent structure, and there is a gap between the vertical steel plate and the transverse steel plate and the through hole of the structural member under the bottom plate.

[0015] Furthermore, a vertical bridging plate is welded and fixed to one side of the vertical steel plate, and the vertical bridging plate is fixedly connected to the cargo hold bottom plate by welding.

[0016] Furthermore, a transverse bridging plate is welded and fixed to one side of the transverse steel plate, and the transverse bridging plate is fixedly connected to the side wall of the ballast tank by welding.

[0017] Furthermore, a plurality of reinforcing shaft plates for structural reinforcement are fixedly connected to the bottom of the bottom plate lower structure, the reinforcing shaft plates are fixedly connected to the side walls of the ballast tank, and the reinforcing shaft plates are located directly below the through holes of the bottom plate lower structure.

[0018] Furthermore, the ventilation groove structures are provided in plurality and distributed along the length direction of the hull; the ventilation groove structures are distributed on the left side and / or right side of the hull.

[0019] The beneficial effects of the present invention are:

[0020] 1. The air on the top of the ballast tank can be completely permeable, and no free liquid surface will be formed in the ballast tank, which is beneficial to the stability of the ship;

[0021] 2. The ballast tanks can be fully filled, allowing the ship to reduce the number of ballast tanks and leave more cargo space;

[0022] 3. The top area of ​​the ballast tank is always filled with water, so the bulkhead is not exposed to humid air and is not prone to corrosion;

[0023] 4. There is no residual air in the ballast tank, and when the ambient temperature changes, the thermal expansion and contraction of the gas will not generate additional pressure on the bulkhead. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural setting diagram of the utility model.

[0025] Figure 2 yes Figure 1 AA view in.

[0026] Figure 3 yes Figure 1 BB cross-section view in.

[0027] Figure 4 It is a schematic diagram of the structural details of the ventilation groove. DETAILED DESCRIPTION

[0028] The following is a combination of the appended examples of the present invention Figure 1-4 The technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort shall fall within the scope of protection of the present invention.

[0029] like Figure 1 、 2 As shown, a venting slot structure for a ship ballast tank is proposed, comprising:

[0030] The vent trough structure 1 is fixedly connected to the cargo hold bottom plate 2 and the ballast tank side wall 5. The vent trough structure 1 is strip-shaped and extends outward from the bottom ballast tank to the side ballast tank area. The vent trough structure 1 is a hollow tubular structure, and its inner end is connected to the interior of the bottom ballast tank. There are multiple vent trough structures 1, which are distributed along the length of the hull. The vent trough structures 1 are distributed on the left and / or right parts of the hull. That is, the vent trough structures 1 can be distributed on the left or right side of the hull, or on both sides of the hull.

[0031] Air pipe 6, air pipe 6 is vertically fixed in the side ballast tank, and its upper section passes through the deck 7 upward. The upper end of the air pipe 6 is fixedly connected to an air pipe head, thereby forming a communication relationship between the air cavity of the ballast tank and the outside atmosphere, that is, achieving a ventilation effect. The lower section of the air pipe 6 is fixedly connected and connected to the outer end of the ventilation groove structure 1.

[0032] The opening at the outer end of the vent groove structure 1 is connected to the air pipe 6 , and the inner end of the vent groove structure 1 is connected to the vent hole 12 of the mid-bottom ballast tank 9 .

[0033] by Figure 1-2 Taking the example shown, the inner end of the air trough structure 1 is connected to the air vent 12 of the middle bottom ballast tank 9, the air trough structure 1 passes through the left bottom ballast tank 10, the outer end of the air trough structure 1 is in the left ballast tank 11, and the lower end of the air pipe 6 is fixedly connected to the outer end of the air trough structure 1, and the outer end opening of the air trough structure 1 is connected to the air pipe 6.

[0034] As a preferred embodiment, Figure 3 、 4 As shown, it also includes a bottom plate lower structure 3 fixedly connected to the cargo hold bottom plate 2, and the bottom plate lower structure 3 is provided with a through hole. The air vent structure 1 passes through the through hole of the bottom plate lower structure 3 of the cargo hold bottom plate 2, and a gap is left between the through hole of the bottom plate lower structure 3 to prevent the hull structure from deforming and squeezing the air vent structure 1.

[0035] As a preferred embodiment, Figure 4 As shown, the air trough structure 1 is composed of a vertical steel plate 1a and a transverse steel plate 1b fixedly combined with each other. The air trough structure 1 is an airtight structure. The vertical steel plate 1a is arranged vertically and its upper edge is fixedly connected to the cargo hold bottom plate 2. The transverse steel plate 1b is arranged horizontally and one side is fixedly connected to the ballast tank side wall 5. The other side of the transverse steel plate 1b is vertically fixedly connected to the lower edge of the vertical steel plate 1a. The transverse steel plate 1b, the vertical steel plate 1a, the cargo hold bottom plate 2 and the ballast tank side wall 5 are combined to form the inner cavity of the air trough structure 1. A gap of 10 mm is left between the vertical steel plate 1a and the transverse steel plate 1b and the through hole of the bottom plate lower structure 3 to avoid direct contact between the air trough structure 1 and the bottom plate lower structure 3.

[0036] To facilitate the securement of the vent trough structure 1, a vertical bridge plate 1c is welded to one side of the vertical steel plate 1a. This bridge plate 1c is welded to the cargo hold floor 2. A transverse bridge plate 1d is welded to one side of the transverse steel plate 1b. This bridge plate 1d is welded to the ballast tank sidewall 5. During the construction of the vent trough structure 1, the vertical and transverse steel plates 1a, 1b, are welded together using these bridge plates 1c and 1d as a foundation, preventing the vent trough structure 1 from damaging the paint on the hull structure during installation.

[0037] like Figure 3As shown, as a preferred embodiment, a plurality of reinforcing shaft plates 4 for structural reinforcement are fixedly connected to the bottom of the above-mentioned bottom plate structural member 3, and the reinforcing shaft plates 4 are fixedly connected to the side walls 5 of the ballast tank. The reinforcing shaft plates 4 are located directly below the through holes of the bottom plate structural member 3, thereby structurally reinforcing the parts of the bottom plate structural member 3 corresponding to the through holes.

[0038] As an optimal process structure setting scheme, the total cross-sectional area of ​​the vent groove (the inner cavity of the vent groove structure 1) should be 1.25 times the cross-sectional area of ​​the ballast tank injection pipe. The required area of ​​a single groove is the required total area divided by the number.

[0039] As a preferred process structure setting scheme, in order to ensure that the ballast tank can be ventilated smoothly under any floating state, each ballast tank is provided with at least two ventilation grooves, one at the bow and the other at the tail of the ballast tank.

[0040] As an optimal process structure setting scheme, the height of the ventilation groove is as small as possible, generally less than 1 / 4 of the height of the structural member passed through; if the height of the ventilation groove exceeds 1 / 4 of the height of the structural member 3 under the bottom plate, a reinforcing shaft plate 4 needs to be set under the ventilation groove for reinforcement; the groove width of the ventilation groove is obtained by dividing the required area of ​​a single ventilation groove by the groove height.

[0041] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "front", "back", etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention; in the present invention, it should also be noted that the terms "installation" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, an integrally formed connection, a mechanical connection, or an indirect connection through an intermediate connecting component, and the specific meaning of the terms in this utility model can be understood based on the specific circumstances.

[0042] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the foregoing description. It is intended that all variations within the meaning and range of equivalents of the claims be encompassed within the present invention, and any reference numerals in the claims should not be construed as limiting the claims to which they relate.

[0043] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A venting groove structure for a ship's ballast tank, characterized in that: include: A ventilating trough structure (1) is fixedly connected to the cargo hold bottom plate (2) and the ballast tank side wall (5), and is strip-shaped as a whole and extends outward from the bottom ballast tank to the side ballast tank area. The ventilating trough structure (1) is a hollow tubular structure, and its inner end is connected to the bottom ballast tank; An air pipe (6) is vertically fixed in the side ballast tank, with its upper section passing through the deck (7) and communicating with the outside atmosphere, and its lower section is fixedly connected to and communicated with the outer end of the air vent structure (1).

2. The venting groove structure of a ship ballast tank according to claim 1, characterized in that: The invention also includes a bottom plate lower structure (3) fixedly connected to the cargo hold bottom plate (2), wherein the bottom plate lower structure (3) is provided with a through hole, and the air vent structure (1) passes through the through hole of the bottom plate lower structure (3) of the cargo hold bottom plate (2), and a gap is left between the through hole of the bottom plate lower structure (3).

3. The venting groove structure of a ship ballast tank according to claim 2, characterized in that: The air vent structure (1) is composed of a vertical steel plate (1a) and a transverse steel plate (1b) fixedly combined with each other. The vertical steel plate (1a) is arranged vertically and its upper edge is fixedly connected to the cargo hold bottom plate (2). The transverse steel plate (1b) is arranged horizontally and one side is fixedly connected to the ballast tank side wall (5). The other side of the transverse steel plate (1b) is vertically fixedly connected to the lower edge of the vertical steel plate (1a). The transverse steel plate (1b), the vertical steel plate (1a), the cargo hold bottom plate (2) and the ballast tank side wall (5) are combined to form the inner cavity of the air vent structure (1). A gap is left between the vertical steel plate (1a) and the transverse steel plate (1b) and the through hole of the bottom plate lower structure (3).

4. The venting groove structure of a ship ballast tank according to claim 3, characterized in that: A vertical bridging plate (1c) is welded and fixed to one side of the vertical steel plate (1a), and the vertical bridging plate (1c) is fixedly connected to the cargo hold bottom plate (2) by welding.

5. The venting groove structure of a ship ballast tank according to claim 3, characterized in that: A transverse bridging plate (1d) is welded and fixed to one side of the transverse steel plate (1b), and the transverse bridging plate (1d) is fixedly connected to the ballast tank side wall (5) by welding.

6. The venting groove structure of a ship ballast tank according to claim 2, characterized in that: A plurality of reinforcing shaft plates (4) for structural reinforcement are fixedly connected to the bottom of the bottom plate lower structure (3); the reinforcing shaft plates (4) are fixedly connected to the ballast tank side walls (5); and the reinforcing shaft plates (4) are located directly below the through holes of the bottom plate lower structure (3).

7. The venting groove structure of a ship ballast tank according to any one of claims 1 to 6, characterized in that: The ventilation slot structures (1) are provided in plurality and distributed along the length direction of the hull.

8. The venting groove structure of a ship ballast tank according to claim 7, characterized in that: The ventilation groove structure (1) is distributed on the left side and / or the right side of the hull.

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