Detachable bubble generating device

Abstract

The utility model discloses a detachable bubble generating device, and belongs to the technical field of ship resistance reduction. Comprising a bottom plate, an air cavity, a flow guide plate and a detachable cover plate. The bottom face of the bottom plate is provided with an opening, and the top face of the bottom plate communicates with a breather pipe through an air cavity. An inclined guide plate is fixed to the end, away from the air cavity, of the bottom opening of the bottom plate. The detachable cover plate is arranged at the bottom of the air cavity, and air in the air cavity can enter the ship bottom under the flow guide effect of the flow guide plate. The connecting plates on the two sides of the detachable cover plate are connected with the limiting plates on the bottom plate through anti-loosening screws. And a plurality of positioning screws are arranged around each stop screw to reinforce the stop screw. After installation is completed, the bottom face of the detachable cover plate is flush with the bottom face of the bottom plate, the surface of the detachable cover plate is slightly lower than the surface of the bottom plate after the stop screws and the positioning screws in the counterbores of the bottom plate are tightened, then the bottom plate is filled and leveled up through marine joint filling glue, marine outer plate paint is sprayed in a unified mode, it is guaranteed that the surface of the bottom plate is flat, and sailing resistance can be reduced.

Description

Technical Field

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

[0002] Due to factors such as seawater erosion and attachment of marine organisms, it is necessary to regularly clean the internal flow channels of the ventilation generator or replace some parts, otherwise the vent may be blocked and the gas cannot flow out normally. Therefore, some parts of the ventilation generator need to be detachable to facilitate subsequent cleaning and replacement. In practical applications, the ventilation generator is an important part of gas lubrication drag reduction technology, and its structure has a great influence on the drag reduction effect. Whether the bottom surface of the ventilation generator is flush with the bottom surface of the ship will affect the hull drag, and then affect the overall drag reduction effect. Therefore, it is necessary to ensure the flatness of the bottom surface of the ventilation generator.

[0003] Most of the existing detachable ventilation devices will form an uneven structure at the opening of the bottom of the ship. For example, Chinese utility model patent CN217022794U discloses an inward-concave detachable ship blowing unit, the opening of which limits the flow direction of bubbles by a cover plate, but the cover plate is not flush with the bottom of the ship, resulting in an increase in the shape resistance of the hull and affecting the deadweight tonnage of the ship at the designed draft.

[0004] Therefore, it is urgent to design a ventilation generating device with a detachable structure, while ensuring that the bottom surface of the device is flush with the bottom surface of the ship to reduce navigation resistance. Utility Model Content

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

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

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

[0008] The bottom plate is connected to the hull steel plate, and an opening for letting in air is provided on the bottom surface of the bottom plate, and the opening is provided along the length direction of the bottom plate; the top surface of the bottom plate is connected to the vent pipe through the air cavity; a guide plate is fixed to the end of the bottom 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 at the bottom of 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] The bottom opening of the bottom plate is provided with limit plates for connecting the removable cover plate on both sides; the positions where the two sides of the removable cover plate are connected to the upper limit plates of the bottom plate are provided with connecting plates, and the connecting plates protrude upward; the width of the lower surface of the connecting plate is equal to the width of the limit plate, so that the removable cover plate can be placed on the limit plate of the bottom plate; a plurality of first countersunk holes for setting anti-loosening screws are arranged at intervals on the limit plate, and threaded blind holes corresponding to the first countersunk holes on the limit plate are arranged at intervals on the connecting plate, and the bottom of the threaded blind holes is closed to prevent seawater from entering and corroding the anti-loosening screws; the anti-loosening screw includes a head and a rod, and the rod of the anti-loosening screw is provided with a thread matching the threaded blind hole; after the anti-loosening screw is screwed into the first countersunk hole and the threaded blind hole, the removable cover plate is fixed to the bottom plate, and the bottom surface of the removable cover plate is flush with the bottom surface of the bottom plate;

[0010] The head of the anti-loosening screw is provided with a plurality of fan-shaped grooves for setting the positioning screws at intervals along the circumferential direction; a second countersunk hole for setting the positioning screw and a threaded hole corresponding to the second countersunk hole are provided around the first countersunk hole on the limiting plate; the positioning screw is screwed into the second countersunk hole and the threaded hole to reinforce the anti-loosening screw.

[0011] Preferably, the head of the anti-loosening screw is provided with four sector-shaped grooves for setting the positioning screws at intervals along the circumferential direction, and the angle between adjacent sector-shaped grooves is 90°.

[0012] Preferably, a thickened boss is provided at a position where a threaded blind hole is required to be opened on the connecting plate of the detachable cover plate to prevent the threaded blind hole from penetrating the connecting plate.

[0013] Preferably, the guide plate has an inclination angle of 3° to 10°.

[0014] Preferably, a plurality of reinforcing ribs are fixed to the top surface of the bottom plate, and the reinforcing ribs extend from the air cavity to an end away from the air cavity.

[0015] Preferably, sealing grease is applied between the connecting holes of the detachable cover plate and the bottom plate to reduce the contact of the threads with seawater.

[0016] Preferably, after the anti-loosening screw in the first countersunk hole and the positioning screw in the second countersunk hole of the bottom plate are tightened, the surface thereof is lower than the surface of the bottom plate.

[0017] Preferably, after the anti-loosening screws in the first countersunk holes and the positioning screws in the second countersunk holes of the bottom plate are tightened, the surface is filled with marine caulking glue and uniformly sprayed with marine outer plate paint.

[0018] Preferably, the bottom plate, guide plate and detachable cover plate are all made of marine steel plate material.

[0019] Preferably, reinforcing ribs are provided on the upper surface of the removable cover along the length direction.

[0020] Compared with the prior art, the utility model has the following beneficial effects:

[0021] (1) In the bubble generating device provided by the utility model, the removable cover plate is of an insert type, which is first placed on the limit plate of the bottom plate and then fixedly connected by anti-loosening screws and positioning screws. After the connection is completed, the bottom surface of the removable cover plate is coplanar with the bottom of the ship, which can minimize the resistance of the ship during navigation.

[0022] (2) In the present invention, the detachable cover plate is detachably connected to the bottom plate by anti-loosening screws and positioning screws, which is convenient for replacement and cleaning; the positioning screws reinforce the anti-loosening screws to prevent loosening caused by vibration during navigation.

[0023] (3) In the utility model, a threaded blind hole formed by a thickened boss is provided on the back of the position where the threaded hole of the removable cover is opened, so that seawater is not easy to corrode the thread through the thread gap; the screws at the connection between the removable cover and the bottom plate are sealed with sealing ester, which can effectively prevent seawater from corroding the thread through the plate gap; the surface of the countersunk screw hole is filled with caulking glue and coated with anti-rust paint to prevent the thread from rusting. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 An overall schematic diagram of the bubble generating device provided in this embodiment;

[0025] Figure 2 A schematic diagram showing the installation of the detachable cover provided in this embodiment;

[0026] Figure 3 A side view of the bubble generating device provided in this embodiment;

[0027] Figure 4 This is a schematic diagram of the connection between the anti-loosening screw and the positioning screw in this embodiment;

[0028] In the figure: bottom plate 1, air cavity 2, guide plate 3, removable cover plate 4, ventilation pipe 5, limit plate 101, connecting plate 401, anti-loosening screw 6, positioning screw 7. DETAILED DESCRIPTION

[0029] 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.

[0030] like Figure 1 As shown, as a preferred mode of the specific implementation provided by the utility model, this embodiment provides a detachable bubble generating device, including a bottom plate 1, an air cavity 2, a guide plate 3 and a detachable cover plate 4.

[0031] In the device provided by the utility model, the bottom plate 1 is connected to the hull steel plate, and an opening for letting in air is provided on the bottom surface of the bottom plate 1, and the opening is provided along the length direction of the bottom plate 1. The top surface of the bottom plate 1 is connected to the vent pipe 7 through the air cavity 2. A guide plate 3 is fixed to one end of the bottom surface opening of the bottom plate 1 away from the air cavity 2, and the guide plate 3 is inclined toward the air cavity 2 from the end away from the air cavity 2.

[0032] In the device provided by the utility model, the removable cover plate 4 is arranged at the bottom of the air cavity 2, and the area of ​​the removable cover plate 4 is larger than the cross-sectional area of ​​the air cavity 2. When the removable cover plate 4 is installed, the air in the air cavity 2 can enter the bottom of the ship under the guiding effect of the guide plate 3.

[0033] In this embodiment, the guide plate 3 can be polished in advance, and the inclination angle of the guide plate 3 is between 3° and 10°. 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.

[0034] In the device provided by the utility model, there are limit plates 101 for connecting the removable cover plate 4 on both sides of the bottom opening of the bottom plate 1. Connecting plates 401 are provided at the positions where the two sides of the removable cover plate 4 are connected to the limit plates 101 on the bottom plate 1. The connecting plates 401 protrude upward, and the width of the lower surface of the connecting plates 401 is equal to the width of the limit plates 101, so that the removable cover plate 4 can be placed on the limit plates 101 of the bottom plate 1.

[0035] In the device provided by the utility model, a plurality of first countersunk holes for setting the anti-loosening screws 6 are provided at intervals on the limit plate 101 on the bottom plate 1. The countersunk hole is a hole opened on the surface of the material, and its characteristic is that the hole opening is concave in a conical shape. This design allows the head of the screw or bolt to be completely embedded in the surface of the material, so that it is concave toward the surface, thereby avoiding protrusion. The connecting plates 401 on both sides of the detachable cover plate 4 are provided with threaded blind holes corresponding to the first countersunk holes on the limit plate 101 at intervals, as shown in FIG. Figure 4 As shown. The anti-loosening screw 6 includes a head and a rod, and the rod of the anti-loosening screw 6 is provided with a thread matching the threaded blind hole. After the anti-loosening screw 6 is screwed into the first countersunk hole and the threaded blind hole, the removable cover plate 4 is fixed on the bottom plate 1, and the bottom surface of the removable cover plate 4 is flush with the bottom surface of the bottom plate 1.

[0036] The anti-loosening screw 6 used in the present invention is a special anti-loosening screw, such as Figure 4As shown in the figure, the head of the anti-loosening screw 6 is provided with a plurality of fan-shaped grooves for setting the positioning screws 7 at intervals along the circumferential direction. In this embodiment, the head of the anti-loosening screw 6 is provided with four fan-shaped grooves for setting the positioning screws 7 at intervals along the circumferential direction, and the angle between adjacent fan-shaped grooves is 90°. Those skilled in the art can also set the number of fan-shaped grooves on the head of the anti-loosening screw 6 according to needs.

[0037] In the present invention, a second countersunk hole for setting a positioning screw 7 and a threaded hole corresponding to the second countersunk hole are provided around the first countersunk hole on the limiting plate 101. The positioning screw 7 is screwed into the second countersunk hole and the threaded hole to reinforce the anti-loosening screw 6 to prevent the screw from loosening due to vibration during driving.

[0038] 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 large mechanical stress and impact. Therefore, in this embodiment, the bottom plate 1, the guide plate 3 and the removable cover plate 4 are all made of ship steel plate material.

[0039] In order to improve the strength and stability of the overall bubble generating device, in this embodiment, a plurality of reinforcing ribs are fixed to the top surface of the bottom plate 1, and the reinforcing ribs extend from the air cavity 2 to the end away from the air cavity. In addition, in this embodiment, the removable cover plate 4 is provided with reinforcing ribs in the middle, and the reinforcing ribs are arranged along the length direction of the upper surface of the removable cover plate 4, so as to reduce the overall mass of the removable cover plate while ensuring the strength.

[0040] Taking into account that the removable cover plate 4 and the bottom plate 1 are immersed in seawater for a long time, the connection will be corroded by seawater and marine organisms. In order to prevent the connection from rusting and rotting and affecting the disassembly, in the present embodiment, the removable cover plate 4 is provided with a threaded blind hole formed by a thickened boss on the back of the position where the threaded hole is opened, so that seawater is not easy to corrode the thread through the thread gap; the screws at the connection between the removable cover plate 4 and the bottom plate 1 are coated with sealing ester to effectively prevent seawater from corroding the thread through the plate gap; the surface of the countersunk screw hole is filled with caulking glue to fill the opening and is uniformly sprayed with marine outer plate paint to prevent the thread from rusting.

[0041] 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 detachable bubble generating device, characterized in that: It comprises a bottom plate (1), an air cavity (2), a guide plate (3) and a detachable cover plate (4); The bottom plate (1) is connected to the hull steel plate, and an opening for letting in air is provided on the bottom surface of the bottom plate (1), and the opening is provided along the length direction of the bottom plate (1); the top surface of the bottom plate (1) is connected to the ventilation pipe (5) through the air cavity (2); a guide plate (3) is fixed to the end of the bottom surface opening of the bottom plate (1) away from the air cavity (2), and the guide plate (3) is inclined from the end away from the air cavity (2) toward the air cavity (2); the detachable cover plate (4) is arranged at the bottom of the air cavity (2), and the area of ​​the detachable cover plate (4) is larger than the cross-sectional area of ​​the air cavity (2), and when the detachable cover plate (4) is installed, the air in the air cavity (2) can enter the bottom of the ship under the guiding effect of the guide plate (3); The bottom opening of the bottom plate (1) is provided with limiting plates (101) for connecting the removable cover plate (4); the positions where the two sides of the removable cover plate (4) are connected to the upper limiting plates (101) of the bottom plate (1) are provided with connecting plates (401), and the connecting plates (401) protrude upwards; the width of the lower surface of the connecting plate (401) is equal to the width of the limiting plates (101), so that the removable cover plate (4) can be placed on the limiting plates (101) of the bottom plate (1); a plurality of locking screws for setting the locking screws are provided at intervals on the limiting plates (101). The first countersunk hole of the stop plate (6) is provided on the connecting plate (401), and threaded blind holes corresponding to the first countersunk holes on the limit plate (101) are provided at intervals, and the bottoms of the threaded blind holes are closed to prevent seawater from entering and corroding the anti-loosening screw (6); the anti-loosening screw (6) comprises a head and a rod, and the rod of the anti-loosening screw (6) is provided with threads matching the threaded blind hole; after the anti-loosening screw (6) is screwed into the first countersunk hole and the threaded blind hole, the removable cover plate (4) is fixed on the base plate (1), and the bottom surface of the removable cover plate (4) is flush with the bottom surface of the base plate (1); The head of the anti-loosening screw (6) is provided with a plurality of fan-shaped grooves for setting the positioning screw (7) at intervals along the circumferential direction; a second countersunk hole for setting the positioning screw (7) and a threaded hole corresponding to the second countersunk hole are provided around the first countersunk hole on the limiting plate (101); the positioning screw (7) is screwed into the second countersunk hole and the threaded hole to reinforce the anti-loosening screw (6).

2. The bubble generating device according to claim 1, characterized in that: The head of the anti-loosening screw (6) is provided with four sector-shaped grooves for arranging the positioning screws (7) at intervals along the circumferential direction, and the angle between adjacent sector-shaped grooves is 90°.

3. The bubble generating device according to claim 1, characterized in that: A thickened boss is provided at a position where a threaded blind hole is required to be opened on the connecting plate (401) of the detachable cover plate (4), so as to prevent the threaded blind hole from penetrating the connecting plate (401).

4. The bubble generating device according to claim 1, characterized in that: The inclination angle of the guide plate (3) is 3° to 10°.

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

6. The bubble generating device according to claim 1, characterized in that: Sealing grease is applied between the connection holes of the detachable cover plate (4) and the bottom plate (1) to reduce the contact of seawater with the threads.

7. The bubble generating device according to claim 1, characterized in that: After the anti-loosening screw (6) in the first countersunk hole of the bottom plate (1) and the positioning screw (7) in the second countersunk hole are tightened, the surface is lower than the surface of the bottom plate (1).

8. The bubble generating device according to claim 1, characterized in that: After the anti-loosening screw (6) in the first countersunk hole and the positioning screw (7) in the second countersunk hole of the bottom plate (1) are tightened, the surface is filled with marine caulking glue and uniformly sprayed with marine outer plate paint.

9. The bubble generating device according to claim 1, characterized in that: The bottom plate (1), the guide plate (3) and the detachable cover plate (4) are all made of marine steel plate material.

10. The bubble generating device according to claim 1, characterized in that: The upper surface of the detachable cover plate (4) is provided with reinforcing ribs along the length direction.

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