Welding type detachable bubble generating device

Abstract

The utility model discloses a welding type detachable bubble generating device, and belongs to the technical field of ship resistance reduction. The device comprises a bottom plate, a detachable cover plate, a flow guide plate and an air cavity. The upper surface of the bottom plate is provided with an opening for introducing air, and the lower surface is communicated with an air inlet pipe through an air cavity; a guide plate is fixed to the end, away from the air cavity, of the upper surface opening of the bottom plate and inclines towards the air cavity from the end away from the air cavity, so that air can enter the ship bottom under the action of the guide plate. A limiting clamping groove used for fixing the detachable cover plate is formed in the end, close to the air cavity, of the upper surface opening of the bottom plate. Limiting protruding blocks matched with the limiting clamping grooves in the two sides of the opening in the upper surface of the bottom plate are arranged on the two sides of the detachable cover plate, the detachable cover plate is detachably connected with the limiting clamping grooves in a spot welding mode, and the detachable cover plate is flush with the upper surface of the bottom plate. The detachable cover plate facilitates cleaning and replacement of the interior of the bubble generating device, after installation is completed, the ventilation opening is flush with the outer surface of the ship bottom, and the sailing resistance is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of ship drag reduction, and in particular relates to a welded detachable bubble generating device. Background Art

[0002] Ship drag reduction technology refers to reducing the resistance encountered by ships when sailing in the water through various methods, thereby increasing speed, reducing fuel consumption and reducing emissions. Existing ship drag reduction technologies include hull optimization design and the installation of air lubrication systems, drag reduction coatings, drag reduction devices, etc.

[0003] Introducing continuous and stable gas into the bottom of the ship can bring better drag reduction effect, but the introduction of gas into the bottom of the ship requires a corresponding bubble generating device. Therefore, the industry has developed various types of ventilation devices. At present, some of the bottom ventilation devices are directly integrated with the hull. Such a design makes the bottom surface of the device conform to the bottom surface of the hull, thereby reducing the friction resistance increased by the uneven bottom surface of the ship. However, these ventilation devices are immersed in seawater for a long time and are susceptible to seawater corrosion and marine organism attachment. Once these problems occur, the cleaning and maintenance of the internal structure of the device will become very difficult. Another part of the bottom ventilation devices adopts a detachable structure design. When encountering problems such as seawater corrosion and marine organism attachment, these devices can be removed for cleaning and maintenance. However, the device of this design is usually not conformal to the bottom plane of the ship, resulting in convexity or depression on the bottom plane of the ship, which greatly increases the sailing resistance.

[0004] Therefore, it is urgent to design a detachable bubble generating device with a vent flush with the outer surface of the bottom of the ship to avoid increasing the shape resistance. Utility Model Content

[0005] The utility model aims to solve the deficiencies in the prior art and provide a welding type detachable bubble generating device.

[0006] The specific technical solutions adopted by this utility model are as follows:

[0007] The utility model provides a welded detachable bubble generating device, comprising a bottom plate, a detachable cover plate, a guide plate and an air cavity;

[0008] The bottom plate is connected to the hull steel plate, and an opening for letting in air is provided on the upper surface of the bottom plate; the lower surface of the bottom plate is connected to the air intake pipe through the air cavity; a guide plate is fixed to the end of the upper surface opening of the bottom plate away from the air cavity, and the guide plate is inclined toward the air cavity from the end away from the air cavity; the detachable cover plate is arranged above the air cavity, and the area of ​​the detachable cover plate is larger than the cross-sectional area of ​​the air cavity, and when the detachable cover plate is installed, the air in the air cavity can enter the bottom of the ship under the guiding effect of the guide plate;

[0009] A limiting slot for fixing the removable cover is provided on one end of the upper surface opening of the base plate close to the air cavity, and the limiting slots are provided on both sides of the upper surface opening of the base plate and on one side close to the air cavity; limiting protrusions matching the limiting slots on both sides of the upper surface opening of the base plate are provided on both sides of the removable cover; the removable cover is detachably connected with the limiting slots by spot welding, and the removable cover is flush with the upper surface of the base plate.

[0010] Preferably, a semicircular notch is pre-provided at the connection between the edge of the detachable cover plate and the limiting slot as a welding point.

[0011] Preferably, a limiting plate is fixed below the limiting slot near one side of the air cavity, so that the detachable cover plate can be inserted between the limiting slot and the limiting plate.

[0012] Preferably, a plurality of reinforcing ribs are fixed to the lower surface of the bottom plate, and the reinforcing ribs extend from the air cavity to an end away from the air cavity.

[0013] Preferably, the spot welding joints between the removable cover plate and the limiting slot are coated with anti-corrosion paint.

[0014] Preferably, the bottom plate is made of marine steel plate material, and the side of the bottom plate connected to the hull is polished in advance.

[0015] Preferably, the detachable cover plate and guide plate are both made of marine steel plate material.

[0016] Compared with the prior art, the utility model has the following beneficial effects:

[0017] (1) In the bubble generating device provided by the utility model, the detachable cover plate is of an insert type, which is first engaged with the limit slot and then connected by spot welding. After the connection is completed, the bottom surface of the detachable cover plate is coplanar with the bottom of the ship, which can minimize the resistance of the ship during navigation.

[0018] (2) The detachable cover plate of the utility model can be disassembled by cutting off the welding points, which is convenient for maintenance and cleaning.

[0019] (3) In the present invention, the welding points where the removable cover plate and the limit slot are connected are sprayed with anti-corrosion paint to prevent the welding points from rusting and affecting disassembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 An overall schematic diagram of the bubble generating device provided in this embodiment;

[0021] Figure 2 A front schematic diagram of the bubble generating device provided in this embodiment;

[0022] Figure 3 A schematic diagram of a detachable cover provided in this embodiment;

[0023] Figure 4 This is a schematic diagram of the connection of the detachable cover plate in this embodiment;

[0024] Figure 5 This is a schematic diagram of the connection of the detachable cover plate in this embodiment;

[0025] In the figure: bottom plate 1, reinforcing rib plate 2, limiting slot 3, air intake pipe 4, removable cover plate 5, limiting protrusion 6, welding point 7, guide plate 8, air cavity 9. DETAILED DESCRIPTION

[0026] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model. Therefore, the utility model is not limited by the specific embodiments disclosed below. The technical features in each embodiment of the utility model can be combined accordingly without conflicting with each other.

[0027] like Figure 1 As shown, as a preferred mode of the specific implementation provided by the utility model, this embodiment provides a welded detachable bubble generating device, including a bottom plate 1, a detachable cover plate 5, a guide plate 8 and an air cavity 9.

[0028] In the device provided by the utility model, the bottom plate 1 is used to be connected to the hull steel plate, and an opening for letting in air is provided on the upper surface of the bottom plate 1, and the opening is provided along the length direction of the bottom plate 1; the lower surface of the bottom plate 1 is connected to the air intake pipe 4 through the air cavity 9; a guide plate 8 is fixed to one end of the opening on the upper surface of the bottom plate 1 away from the air cavity 9, and the guide plate 8 is inclined downward from the end away from the air cavity 9 to the end close to the air cavity 9.

[0029] In the device provided by the utility model, the removable cover plate 5 is arranged above the air cavity 9, and the area of ​​the removable cover plate 5 is larger than the cross-sectional area of ​​the air cavity 9. When the removable cover plate 5 is installed, air enters the air cavity 9 from the air intake pipe 4, and the air in the air cavity 9 can enter the bottom of the ship under the guiding effect of the guide plate 8.

[0030] In this embodiment, the guide plate is polished in advance, and the guide plate 8 has a certain inclination angle. Those skilled in the art can select a suitable inclination angle according to the specific situation so that the air can smoothly enter the bottom of the ship.

[0031] In the device provided by the utility model, a limit slot 3 for fixing the detachable cover plate 5 is provided at one end of the upper surface opening of the bottom plate 1 close to the air cavity 9. Figure 2 As shown, the limiting slots 3 are arranged on both sides of the opening on the upper surface of the bottom plate 1 and on one side close to the air cavity 9. The lengths of the limiting slots 3 on both sides of the opening on the upper surface of the bottom plate 1 can be determined according to actual conditions.

[0032] like Figure 3 As shown, the two sides of the removable cover plate 5 are provided with limiting protrusions 6 that match the limiting slots 3 on both sides of the opening on the upper surface of the bottom plate 1. The limiting protrusions 6 can be stuck under the limiting slots 3 on both sides, so that the removable cover plate 5 can move forward and backward in the length direction of the limiting slots 3 on both sides. In this embodiment, a limiting plate is fixed under the limiting slot 3 on the side close to the air cavity 9, so that the removable cover plate 5 can be inserted between the limiting slot 3 and the limiting plate.

[0033] In the device provided by the utility model, the detachable cover plate 5 is detachably connected with the limit slot 3 by spot welding, and the detachable cover plate 5 is flush with the upper surface of the bottom plate 1, which can greatly reduce the sailing resistance of the ship.

[0034] On the other hand, since the ship steel plate material has a strong corrosion resistance, especially in the marine environment, it can effectively resist the erosion of salt water and other corrosive substances. In addition, the ship steel plate material has high strength and can withstand greater mechanical stress and impact. Therefore, the bottom plate 1, the removable cover plate 5 and the guide plate 8 can also be made of ship steel plate material.

[0035] In order to improve the strength and stability of the overall bubble generating device, in this embodiment, a plurality of reinforcing ribs 2 are fixed to the lower surface of the bottom plate 1. Three reinforcing ribs 2 can be provided, which are vertically fixed to the lower surface of the bottom plate 1 by welding, and the reinforcing ribs 2 extend from the air cavity 9 to one end away from the air cavity 9.

[0036] In order to facilitate fixing, the edge of the detachable cover plate 5 needs to be pre-arranged with a semicircular notch at the connection with the limit slot 3 as a welding point 7. The side of the bottom plate 1 connected to the hull is polished in advance.

[0037] Considering that the detachable cover plate 5 and the limit slot 3 are immersed in seawater for a long time, the welding points and welds at the welding places will also be corroded by seawater and marine organisms. In order to prevent the welding places from rusting, anti-corrosion paint is applied to the welding places after welding is completed.

[0038] like Figure 4 As shown, during assembly, the removable cover plate 5 is inserted inward along the limiting slots 3 on both sides of the bottom plate 1, and one end of the removable cover plate 5 is stuck in the limiting slot 3 near the air cavity 9. Figure 5As shown, after the assembly is completed, spot welding is evenly performed at the positions of the welding points 7. When disassembling, the welding points 7 are cut off, and the removable cover plate 6 is pulled outward along the limiting slots 3 on both sides of the bottom plate 1.

[0039] The utility model provides a bubble generating device with a welded detachable structure, wherein the detachable cover plate and the bottom plate are in the same plane, thus overcoming the problem of large sailing resistance caused by the non-conformity between the bottom of the existing cover plate and the bottom plane of the ship.

[0040] The above-described embodiment is only a preferred solution of the present invention, but it is not intended to limit the present invention. Ordinary technicians in the relevant technical field can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, any technical solution obtained by equivalent replacement or equivalent transformation falls within the protection scope of the present invention.

Claims

1. A weldable detachable bubble generating device, characterized in that: It comprises a bottom plate (1), a detachable cover plate (5), a guide plate (8) and an air cavity (9); The bottom plate (1) is connected to the hull steel plate, and an opening for letting in air is provided on the upper surface of the bottom plate (1); the lower surface of the bottom plate (1) is connected to the air intake pipe (4) through the air cavity (9); a guide plate (8) is fixed to the end of the opening on the upper surface of the bottom plate (1) away from the air cavity (9), and the guide plate (8) is inclined from the end away from the air cavity (9) toward the air cavity (9); the detachable cover plate (5) is arranged above the air cavity (9), and the area of ​​the detachable cover plate (5) is larger than the cross-sectional area of ​​the air cavity (9), and when the detachable cover plate (5) is installed, the air in the air cavity (9) can enter the bottom of the ship under the guiding effect of the guide plate (8); A limiting slot (3) for fixing the removable cover plate (5) is provided at one end of the upper surface opening of the base plate (1) close to the air cavity (9), and the limiting slot (3) is provided on both sides of the upper surface opening of the base plate (1) and on one side close to the air cavity (9); limiting protrusions (6) matching the limiting slots (3) on both sides of the upper surface opening of the base plate (1) are provided on both sides of the removable cover plate (5); the removable cover plate (5) is detachably connected to the limiting slot (3) by spot welding, and the removable cover plate (5) is flush with the upper surface of the base plate (1).

2. The welding type detachable bubble generating device according to claim 1, characterized in that: A limiting plate is fixed below the limiting slot (3) on one side close to the air cavity (9), so that the detachable cover plate (5) can be inserted between the limiting slot (3) and the limiting plate.

3. The welding type detachable bubble generating device according to claim 1, characterized in that: A semicircular notch is pre-provided at the connection between the edge of the detachable cover plate (5) and the limiting slot (3) as a welding point (7).

4. The welding type detachable bubble generating device according to claim 1, characterized in that: A plurality of reinforcing ribs (2) are fixed to the lower surface of the bottom plate (1), and the reinforcing ribs (2) extend from the air cavity (9) to an end away from the air cavity (9).

5. The welding type detachable bubble generating device according to claim 1, characterized in that: The spot-welded connection between the detachable cover plate (5) and the limiting slot (3) is coated with anti-corrosion paint.

6. The welding type detachable bubble generating device according to claim 1, characterized in that: The bottom plate (1) is made of ship steel plate material, and the side of the bottom plate (1) connected to the hull is polished in advance.

7. The welding type detachable bubble generating device according to claim 1, characterized in that: The detachable cover plate (5) and the guide plate (8) are both made of marine steel plate material.

Images