CN220243456U - Improved generation air cavity structure - Google Patents
Improved generation air cavity structure Download PDFInfo
- Publication number
- CN220243456U CN220243456U CN202321738645.6U CN202321738645U CN220243456U CN 220243456 U CN220243456 U CN 220243456U CN 202321738645 U CN202321738645 U CN 202321738645U CN 220243456 U CN220243456 U CN 220243456U
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- China
- Prior art keywords
- air cavity
- overhaul
- tubular structure
- air
- window
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- 238000007789 sealing Methods 0.000 claims abstract description 5
- 238000002347 injection Methods 0.000 claims description 10
- 239000007924 injection Substances 0.000 claims description 10
- 238000012423 maintenance Methods 0.000 abstract description 20
- 238000003466 welding Methods 0.000 abstract description 12
- 238000000034 method Methods 0.000 abstract description 8
- 230000008569 process Effects 0.000 abstract description 7
- 238000005452 bending Methods 0.000 abstract description 3
- 238000007689 inspection Methods 0.000 abstract description 3
- 238000004140 cleaning Methods 0.000 abstract description 2
- 230000008439 repair process Effects 0.000 abstract description 2
- 238000005461 lubrication Methods 0.000 description 11
- 230000009467 reduction Effects 0.000 description 11
- 239000011248 coating agent Substances 0.000 description 4
- 238000000576 coating method Methods 0.000 description 4
- 239000013535 sea water Substances 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005536 corrosion prevention Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T70/00—Maritime or waterways transport
- Y02T70/10—Measures concerning design or construction of watercraft hulls
Landscapes
- Arc Welding In General (AREA)
Abstract
The utility model discloses an improved air cavity structure, which comprises a tubular structure arranged on a ship bottom outer plate, wherein a space formed by the tubular structure and the ship bottom outer plate forms an air cavity, a plurality of air holes are formed in the ship bottom outer plate and are arranged at the bottom of the air cavity, the upper surface of the tubular structure is a plane, a plurality of air holes are formed in the upper surface of the tubular structure and are connected with an air supply straight pipe, an overhaul window is formed in the upper surface of the air cavity, an overhaul cover plate is arranged on the overhaul window and is in threaded connection with the overhaul window, and a sealing gasket is arranged at the joint of the overhaul cover plate and a convex structure. The utility model solves the problems that the air cavity cannot be coated in a narrow space and can not be cleaned and maintained in a later period. The air cavity main body structure can be processed in a welding or bending mode, so that convenience and feasibility of engineering application are guaranteed. The maintenance windows are arranged at intervals, so that convenience in inspection, cleaning and maintenance in the later use process is further ensured, and the workload of later maintenance and repair can be obviously reduced.
Description
Technical Field
The utility model relates to the field of air lubrication drag reduction, in particular to an improved air cavity structure.
Background
The air lubrication drag reduction technology is an effective innovative energy-saving technology, and has remarkable contribution to reducing the energy consumption of ships, reducing the carbon emission of the ships and the like. The air lubrication drag reduction system consists of an air supply system, an air injection system and a control system. The air cavity is an important component of an air injection system, and the air cavity in the conventional scheme is formed by symmetrically cutting a steel pipe into two halves and directly welding the two halves on an outer plate of the ship bottom to form the air cavity.
In the traditional air cavity structure, the diameter of the air cavity is only about 150mm, and the length of the air cavity exceeds 20m within the half-width range of a ship, so that a narrow space is formed, the narrow space inside the air cavity cannot be coated and protected in the construction process, and even if the air cavity is coated in advance, the precoated paint can be damaged by welding in the combination process. When the air lubrication drag reduction system does not operate under the working conditions of ship harbor entering, low-speed sailing and the like, seawater can enter the air cavity, and the seawater directly contacts the ship body structure without coating protection, so that the rapid corrosion of the ship body structure in the area can be caused. There are two solutions currently in common use: firstly, adopting a seawater corrosion resistant 1% chromium steel material to process an air cavity, an air supply pipeline and a ship body outer plate in an attachment area; secondly, the hull planking adopts thicker ordinary marine steel sheet, reserves the corruption surplus. Both methods can result in increased cost of application of the air lubrication drag reduction system; meanwhile, more welding seams are added, and the workload of welding and flaw detection is increased.
On the other hand, as the outer plate at the bottom of the air cavity is provided with a plurality of air injection holes, marine organisms can enter the air cavity through the air injection holes in the seawater soaking process and adhere, grow and reproduce, the air cavity space is airtight and can not be cleaned and maintained, the air cavity is blocked in the long time, and the energy-saving effect of the air lubrication drag reduction system is affected.
Therefore, how to solve the problems of coating corrosion prevention and maintenance in a narrow space inside the air cavity is a precondition for reducing the application cost of the air lubrication drag reduction system and ensuring the energy-saving effect.
Disclosure of Invention
Aiming at the problems, the utility model provides an improved air cavity structure, solves the coating and maintenance problems of a narrow space inside an air cavity, further reduces the cost of the air cavity and the whole air lubrication drag reduction system, and improves the feasibility and economy of the application of the air lubrication drag reduction system.
In order to achieve the above purpose, the utility model provides an improved air cavity structure, which comprises a tubular structure arranged on a bottom outer plate, wherein an air cavity is formed by a space formed by the tubular structure and the bottom outer plate, a plurality of air injection holes are arranged on the bottom outer plate, and the air injection holes are arranged at the bottom of the air cavity.
The upper surface of tubular structure is the plane, and tubular structure's upper surface is equipped with a plurality of gas pocket, and the gas pocket is connected with the air feed branch pipe, and tubular structure's upper surface is equipped with the maintenance window that a plurality of interval set up.
The maintenance window is the opening that the shape is the rectangle, and the air cavity passes through maintenance window and external intercommunication, is equipped with the maintenance apron on the maintenance window, and the inward extension of opening edge of maintenance window forms protruding structure, and protruding structure's upper surface is equipped with a plurality of screw, and the edge of maintenance apron is equipped with the through-hole corresponding with screw position, and maintenance apron and protruding structure junction are equipped with sealing gasket.
The access cover plate is of a detachable structure and is in threaded connection with the protruding structure at the edge of the access window through bolts.
In the improved air cavity structure, the longitudinal section of the tubular structure is rectangular in a preferred mode.
In the improved air cavity structure, the longitudinal section of the tubular structure is trapezoidal in a preferred mode.
According to the improved air cavity structure, in a preferred mode, the lower surface of the protruding structure is provided with the plurality of toggle plates for increasing structural strength, and the toggle plates are of right-angled triangle structures.
In the improved air cavity structure, preferably, one right-angle edge of the toggle plate is connected with the lower surface of the protruding structure, and the other right-angle edge of the toggle plate is connected with the side surface of the air cavity.
In the improved air cavity structure, the distance range of the edge of each overhaul window is 1.5m-2m in a preferred mode.
In the improved air cavity structure, the maximum width of the air cavity is 150mm in a preferred mode.
The utility model has the advantages that the difficult problems that the air cavity is not coated in a narrow space and the air cavity cannot be cleaned and maintained in a later period are solved without using expensive tools such as an automatic robot and the like. By adopting the improved air cavity form, the air cavity and the attached ship body structure do not need special materials such as 1% chromium steel and the like, and do not need thickened corrosion allowance, so that the manufacturing cost can be obviously reduced, and the application economy of the air lubrication drag reduction system is improved. The air cavity main body structure can be processed in a welding or bending mode, so that convenience and feasibility of engineering application are guaranteed. The maintenance windows arranged at intervals can be flexibly opened and closed according to the needs, rather than completely disassembling the upper surface of the whole air cavity, so that convenience in inspection, cleaning and maintenance in the later use process is ensured, and the workload of later maintenance and repair can be obviously reduced.
Drawings
FIG. 1 is a schematic diagram of the overall structure of the improved air cavity structure of the present utility model.
FIG. 2 is a schematic diagram of a cross-sectional structure of an improved air cavity structure A-A of the present utility model.
In the figure: 1. tubular structure 2, hull planking, 3, air cavity, 4, toggle plate, 5, air feed branch pipe, 6, access window, 7, access cover plate, 8, bolt, 9, sealing gasket, 10, fumarole.
Detailed Description
As shown in fig. 1 and 2, the improved air cavity structure of the utility model comprises a tubular structure 1 arranged on a ship bottom outer plate 2, wherein an air cavity 3 is formed by a space surrounded by the tubular structure 1 and the ship bottom outer plate 2, a plurality of air injection holes 10 are arranged on the ship bottom outer plate 2, and the air injection holes 10 are arranged at the bottom of the air cavity 3.
The upper surface of tubular structure 1 is the plane, and the upper surface of tubular structure 1 is equipped with a plurality of gas pocket, and the gas pocket is connected with air feed branch pipe 5, and the upper surface of tubular structure 1 is equipped with a plurality of maintenance window 6 that the interval set up.
The access window 6 is the opening that the shape is the rectangle, and air cavity 3 communicates with the external world through access window 6, is equipped with access cover 7 on the access window 6, and the opening edge of access window 6 inwards extends to form protruding structure, and protruding structure's upper surface is equipped with a plurality of screw, and access cover 7's edge is equipped with the through-hole corresponding with the screw position, and access cover 7 is equipped with sealing gasket 9 with protruding structure junction.
The access cover plate 7 is of a detachable structure, and the access cover plate 7 is in threaded connection with a protruding structure at the edge of the access window 6 through bolts 8.
In one embodiment, the tubular structure 1 has a rectangular longitudinal section.
In another embodiment, the tubular structure 1 has a trapezoidal longitudinal section.
The lower surface of the protruding structure is provided with a plurality of toggle plates 4 for increasing structural strength, each toggle plate 4 is of a right-angled triangle structure, one right-angle side of each toggle plate 4 is connected with the lower surface of the protruding structure, and the other right-angle side of each toggle plate 4 is connected with the side surface of the air cavity 3.
The distance of the edge of each access window 6 is in the range of 1.5m-2m.
The maximum width of the air cavity 3 is 150mm.
The main body structure of the rectangular or trapezoidal air cavity 3 can be processed in a welding mode; the whole plate can be subjected to press bending processing, so that the length of a welding seam can be reduced, the probability of welding defects is reduced, and the workload of welding and checking can be reduced.
Each air cavity 3 is provided with a plurality of overhaul windows 6 at intervals, and only the overhaul windows 6 at the required positions can be opened according to the requirements, so that the inspection workload is reduced.
The distance between the edges of the access windows 6 is about 2 meters, so that the space in the air cavity between two adjacent access windows 6 can be covered by bare hands without using special tools or automatic robots.
The arrangement scheme of arranging the overhaul window 6 in the air cavity 3 fundamentally solves the problem that the narrow space inside the air cavity cannot be coated and maintained; therefore, the problem that the ship body outer plate in the area where the air cavity 3 is located adopts a remedy scheme of thickening or special material bottom outer plate, but directly adopts the common bottom outer plate 2 is avoided, the application cost of the air lubrication drag reduction system is greatly reduced, the length of a welding seam is greatly reduced, and the workload of welding, flaw detection and the like is reduced.
The size, the number and the positions of the overhaul windows 6 are optimally arranged, all surface area areas inside the air cavity 3 can be covered without high-cost automatic tools, no dead angle is ensured during coating and later maintenance, meanwhile, in the later maintenance process, the overhaul cover plates 7 of the required areas can be opened as required, and the workload of later maintenance is reduced.
Depending on the requirements of the work and the situation at hand, it is also possible to arrange access windows 6, access panels 7 etc. on the side walls of the air chamber 3.
The foregoing is only a preferred embodiment of the present utility model, but the scope of the present utility model is not limited thereto, and any person skilled in the art, who is within the scope of the present utility model, should be covered by the protection scope of the present utility model by making equivalents and modifications to the technical solution and the inventive concept thereof.
Claims (7)
1. The improved air cavity structure is characterized by comprising a tubular structure (1) arranged on a ship bottom outer plate (2), wherein an air cavity (3) is formed by a space surrounded by the tubular structure (1) and the ship bottom outer plate (2), a plurality of air injection holes (10) are formed in the ship bottom outer plate (2), and the air injection holes (10) are formed in the bottom of the air cavity (3);
the upper surface of the tubular structure (1) is a plane, a plurality of air holes are formed in the upper surface of the tubular structure (1), the air holes are connected with the air supply branch pipe (5), and a plurality of overhaul windows (6) which are arranged at intervals are formed in the upper surface of the tubular structure (1);
the air cavity (3) is communicated with the outside through the overhaul window (6), an overhaul cover plate (7) is arranged on the overhaul window (6), the edge of the opening of the overhaul window (6) inwards extends to form a convex structure, a plurality of screw holes are formed in the upper surface of the convex structure, through holes corresponding to the screw hole positions are formed in the edge of the overhaul cover plate (7), and a sealing gasket (9) is arranged at the joint of the overhaul cover plate (7) and the convex structure;
the overhaul cover plate (7) is of a detachable structure, and the overhaul cover plate (7) is in threaded connection with a protruding structure at the edge of the overhaul window (6) through bolts (8).
2. An improved air cavity structure according to claim 1, characterized in that the longitudinal section of the tubular structure (1) is rectangular.
3. An improved air cavity structure according to claim 1, characterized in that the longitudinal section of the tubular structure (1) is trapezoidal.
4. An improved air cavity structure according to claim 1, characterized in that a plurality of toggle plates (4) for increasing structural strength are arranged on the lower surface of the convex structure, and the toggle plates (4) are of right triangle structures.
5. An improved air cavity structure according to claim 4, characterized in that one right-angle side of the toggle plate (4) is connected with the lower surface of the raised structure, and the other right-angle side of the toggle plate (4) is connected with the side surface of the air cavity (3).
6. An improved air cavity structure according to claim 1, characterized in that the distance of the edges of each access window (6) is in the range of 1.5m-2m.
7. An improved air cavity structure according to claim 1, characterized in that the maximum width of the air cavity (3) is 150mm.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2022232706899 | 2022-12-07 | ||
| CN202223270689 | 2022-12-07 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220243456U true CN220243456U (en) | 2023-12-26 |
Family
ID=89230889
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321738645.6U Active CN220243456U (en) | 2022-12-07 | 2023-07-05 | Improved generation air cavity structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220243456U (en) |
-
2023
- 2023-07-05 CN CN202321738645.6U patent/CN220243456U/en active Active
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| GR01 | Patent grant | ||
| GR01 | Patent grant |