CN221049883U - Seawater main pipe suitable for bubble drag reduction system - Google Patents
Seawater main pipe suitable for bubble drag reduction system Download PDFInfo
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- CN221049883U CN221049883U CN202322967932.0U CN202322967932U CN221049883U CN 221049883 U CN221049883 U CN 221049883U CN 202322967932 U CN202322967932 U CN 202322967932U CN 221049883 U CN221049883 U CN 221049883U
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- seawater
- main pipe
- manifold
- opening
- pipe
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- 239000013535 sea water Substances 0.000 title claims abstract description 155
- 238000009423 ventilation Methods 0.000 claims abstract description 22
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 2
- 239000011701 zinc Substances 0.000 claims description 2
- 229910052725 zinc Inorganic materials 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 11
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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- Filtration Of Liquid (AREA)
Abstract
A sea water main pipe suitable for a bubble drag reduction system is vertically provided with two hull structures in a sea chest, and two openings are respectively formed in the two hull structures and are staggered up and down. The seawater main pipe is provided with a seawater elbow at one end positioned in the submarine tank, an opening of the seawater elbow is bent downwards, the other end of the seawater main pipe is sequentially connected with a seawater filter and a seawater branch pipe, the top of the seawater filter is provided with a ventilation point, the position close to the seawater branch pipe is provided with a ventilation point, and the ventilation point is sequentially provided with a bubble capturing short pipe, a stop valve and a ventilation pipe from bottom to top. The risk that bubbles generated by the bubble drag reduction system enter the seawater pump is reduced by optimizing the form and the accessory composition of the seawater main pipe. Through the ventilation points on the seawater branch pipes and the seawater filter, bubbles are prevented from entering the seawater pump. For ships adopting the bubble drag reduction system, the design scheme is adopted, and the invention is simultaneously suitable for projects that some draft is shallow, and bubbles possibly enter a seawater system under the condition of severe sea conditions.
Description
Technical Field
The invention belongs to the field of ship construction and design, and particularly relates to a seawater main pipe suitable for a bubble drag reduction system.
Background
The bubble drag reduction system is a new energy-saving technology which is popular recently, the basic principle is that compressed air is blown to sea water by an air compressor, a large amount of bubbles are generated in the sea water, the bubbles can be attached to a ship bottom structure, the ship navigation resistance is reduced, the navigation speed is improved, the load of a host machine is reduced, and finally the purpose of reducing the ship navigation cost is achieved. In the real ship project, a bubble drag reduction system is adopted, but in the running process of the bubble drag reduction system, a large amount of bubbles can be generated at the bottom of the ship, and the bubbles move towards the stern along with the ship body in a linear manner.
In this case, part of the bubbles will enter the sea chest through the hull structure opening. Because the bubble volume that bubble drag reduction system produced is big, and submarine tank structure is narrow and small, boats and ships can produce because of external stormy waves influence at the navigation in-process simultaneously and rock, and the bubble that is mingled in the sea water probably can not be through the whole discharge of the ventilative pipeline of subsea valve, and the bubble of escape can follow rivers and get into in the sea water house steward.
In current seawater manifold designs, once the bubbles enter the seawater manifold, there is no way or means to expel the bubbles therein. The part of bubbles enter a seawater system along with water flow, and the working state of each seawater pump (such as a main seawater pump, a seawater pump of a water making machine, a seawater pump of a washing system and the like) is influenced, the working environment of an impeller in the pump is destroyed, the service life of the seawater pump is greatly shortened, and the outlet pressure of the pump cannot be stabilized; meanwhile, bubbles are transported to all system equipment through the lightering of the seawater pump, and irreversible damage can be caused to other equipment, so that serious potential safety hazards are generated.
Therefore, for the ship project adopting the bubble drag reduction system, the possibility that bubbles enter the seawater pump needs to be considered in the design of the seawater main pipe, the design of the seawater main pipe is optimized, and the situation that the bubbles in the seawater cannot enter the seawater pump and further influence the whole seawater system is ensured.
Disclosure of Invention
In order to solve the problems, the invention provides a seawater main pipe suitable for a bubble drag reduction system, which aims to achieve the purposes of rapidly removing bubbles and avoiding the bubbles from entering the seawater main pipe, and adopts the following technical scheme:
The utility model provides a sea water house steward suitable for bubble drag reduction system, is provided with two hull structures in the submarine tank vertically, all has the interval between two hull structures, between hull structure and the sea water house steward.
The two hull structures are respectively provided with an opening, the hull structure close to the sea water main pipe is a first hull structure, the opening on the first hull structure is a first opening, and the first opening is arranged at the top of the first hull structure; the hull structure far away from the sea water main pipe is a second hull structure, the opening on the second hull structure is a second opening, and the second opening is formed in the bottom of the second hull structure.
The seawater main pipe is provided with a seawater elbow at one end positioned in the submarine tank, an opening of the seawater elbow is bent downwards, the other end of the seawater main pipe is sequentially connected with a seawater filter and a seawater branch pipe, the top of the seawater filter is provided with a ventilation point, the position close to the seawater branch pipe is provided with a ventilation point, and the ventilation point is sequentially provided with a bubble capturing short pipe, a stop valve and a ventilation pipe from bottom to top.
The seawater main pipe suitable for the bubble drag reduction system is characterized in that seawater branch pipes are connected with one end of the seawater main pipe, and 1/3 of the seawater branch pipes extend into the seawater main pipe.
The seawater manifold for the bubble drag reduction system is characterized in that the opening of the seawater elbow is lower than the second opening.
The sea water main pipe suitable for the bubble drag reduction system is characterized in that the flow area of the first opening and the second opening is larger than that of the sea water main pipe.
The seawater main pipe suitable for the bubble drag reduction system has the caliber of DN 300-DN 400.
The sea water main pipe suitable for the bubble drag reduction system is characterized in that a plurality of zinc blocks with sacrificial anodes are arranged in a sea chest.
The seawater main pipe suitable for the bubble drag reduction system is further provided, and the caliber of the vent pipe is DN100.
The sea water main pipe suitable for the bubble drag reduction system is characterized in that the top of the sea water pump and the sea water branch pipe are communicated with the ventilation points.
The sea water main pipe suitable for the bubble drag reduction system is characterized in that a sea water pump is arranged on the sea water branch pipe, and the ventilation point on the sea water branch pipe is positioned at the outlet of the sea water pump.
Aiming at the risk that bubbles of the bubble drag reduction system enter the seawater pump, a new design scheme of the seawater main pipe is provided, and the risk that the bubbles generated by the bubble drag reduction system enter the seawater pump is reduced by optimizing the form and the accessory composition of the seawater main pipe. Through the ventilation points on the seawater branch pipes and the seawater filter, bubbles are prevented from entering the seawater pump. For ships adopting the bubble drag reduction system, the design scheme is adopted, and the invention is simultaneously suitable for projects that some draft is shallow, and bubbles possibly enter a seawater system under the condition of severe sea conditions.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
Wherein, 1-first hull structure, 2-second hull structure, 3-first trompil, 4-second trompil, 5-sea water house steward, 6-bubble capture nozzle stub, 7-stop valve, 8-permeability pipe, 9-sea water elbow, 10-sea water filter, 11-sea water branch pipe.
Detailed Description
The invention will be further described with reference to the accompanying drawings.
As shown in figure 1, a sea water main pipe suitable for a bubble drag reduction system is vertically provided with two hull structures in a sea chest, and spaces are reserved between the two hull structures and between the hull structures and the sea water main pipe.
The two hull structures are respectively provided with an opening, the hull structure close to the sea water main pipe 5 is a first hull structure 1, the opening on the first hull structure is a first opening 3, and the first opening is arranged at the top of the first hull structure; the hull structure far away from the sea water main pipe is a second hull structure 2, the opening on the second hull structure is a second opening 4, and the second opening is formed in the bottom of the second hull structure. The flow area of the first opening and the second opening is larger than that of the seawater main pipe, and the seawater flow direction is shown in figure 1.
The seawater main pipe is provided with a seawater elbow 9 at one end of the seawater main pipe, which is positioned in the submarine tank, the opening of the seawater elbow is bent downwards, the other end of the seawater main pipe is sequentially connected with a seawater filter 10 and a seawater branch pipe 11, ventilation points are arranged on the seawater filter and the seawater branch pipe, the ventilation points are sequentially provided with a bubble capturing short pipe 6, a stop valve 7 and a ventilation pipe 8 from bottom to top, and the diameter of the bubble capturing short pipe is larger than that of the ventilation pipe. The bubble catching short pipe is communicated with the top of the sea water pump.
The seawater elbow 9 is added at one end of the seawater main pipe, most of bubbles entering the submarine tank along with seawater can be gathered at the top of the submarine tank due to buoyancy of the seawater main pipe, but due to the fact that the quantity of the bubbles is large, the bubbles continuously enter the submarine tank, and some bubbles necessarily still move along with the middle layer of the water flow in the tank. By adding the seawater elbow at the tail end of the seawater main pipe, the suction height of the seawater main pipe can be reduced, bubbles in water flow are screened out again, and bubbles in the middle layer and the upper layer of the submarine tank are prevented from being sucked into the seawater main pipe. The same effect is obtained for the top-in sea water mains by extending as far down as possible.
The top of the seawater main pipe filter is additionally provided with the ventilation pipeline, when water flows through the seawater filter, the filtering effect of the filter can generate disturbance and speed reduction effects on the water flow, and at the moment, bubbles in the water flow are more easily gathered on the upper layer of the water flow, so that the bubbles in the water flow can be effectively discharged by arranging the ventilation pipeline at the top end of the filter; meanwhile, in order to enhance the capturing capability of bubbles in water flow as much as possible, an oversized bubble capturing short pipe 4 (the caliber of the bubble capturing short pipe is usually DN 300-DN 400 or is set according to the size of a filter) is arranged, and bubbles in the upper layer of the water flow can be sunk into the short pipe and cannot escape, and then are discharged to the atmosphere through a vent pipe.
And adjusting the form of the seawater branch pipe, and for removing bubbles which still escape into the seawater main pipe through multiple screening, adjusting the form of the suction branch pipe of the seawater pump is needed to avoid the risk of bubbles entering the pump. The conventional branch pipe is formed by directly butt-welding the cut lines of the main pipe and the branch pipe, the branch pipe does not extend into the main pipe, and at the moment, bubbles above the inner part of the main pipe are very easy to be sucked into the branch pipe due to negative pressure caused by a seawater pump, and then enter a pump body and subsequent equipment. As shown in figure 1, the regulated seawater branch pipe extends into the seawater main pipe by about 1/3, and the bubbles accumulated in the upper layer in the seawater main pipe are effectively prevented from being sucked while ensuring enough flow area.
The air-permeable pipeline is arranged at the downstream of the seawater filter, most of air bubbles can be prevented from entering the seawater main pipe through the three measures, and only a very small part of air bubbles possibly remain in the main pipe at the downstream of the seawater filter, but if the part of air bubbles cannot be discharged, the air bubbles in the main pipe can be accumulated continuously along with long-time running of the ship, so that hidden danger is caused to the safe running of a seawater system. Therefore, the air-permeable pipeline is arranged at the downstream of the seawater filter, and bubbles in the main pipe are captured through the bubble capturing short pipe, so that part of the bubbles are timely discharged to the atmosphere, and the hidden danger caused by the accumulation of the bubbles in the main pipe due to the long-term operation of the bubble drag reduction system is solved.
Claims (9)
1. The sea water main pipe suitable for the bubble drag reduction system is characterized in that two hull structures are vertically arranged in a sea chest, and a space exists between the two hull structures and between the hull structures and the sea water main pipe (5);
The two hull structures are respectively provided with an opening, the hull structure close to the sea water main pipe is a first hull structure (1), the opening on the first hull structure is a first opening (3), and the first opening is arranged at the top of the first hull structure; the hull structure far away from the sea water main pipe is a second hull structure (2), the opening on the second hull structure is a second opening (4), and the second opening is formed in the bottom of the second hull structure;
The seawater main pipe is provided with a seawater elbow (9) at one end of the seawater main pipe, which is positioned in the submarine tank, the opening of the seawater elbow is bent downwards, the other end of the seawater main pipe is sequentially connected with a seawater filter (10) and a seawater branch pipe (11), the top of the seawater filter is provided with a ventilation point, the position close to the seawater branch pipe is provided with a ventilation point, and the ventilation point is sequentially provided with a bubble capturing short pipe (6), a stop valve (7) and a ventilation pipe (8) from bottom to top.
2. A seawater manifold for a bubble drag reducing system as claimed in claim 1, wherein the seawater manifold is connected to one end of the seawater manifold, and 1/3 of the seawater manifold extends into the seawater manifold.
3. A seawater manifold for a bubble drag reducing system as claimed in claim 1, wherein the seawater elbow opening is below the second aperture.
4. The seawater manifold of claim 1, wherein the first and second openings have a flow area greater than the flow area of the seawater manifold.
5. The seawater manifold of claim 1, wherein the bubble trap spool has a bore of DN 300-DN 400.
6. A seawater manifold for a bubble drag reducing system as claimed in claim 1, wherein a plurality of zinc blocks of sacrificial anodes are disposed within the subsea tank.
7. A seawater manifold for a bubble drag reducing system as recited in claim 1, wherein the vent tube has a diameter DN100.
8. The seawater manifold of claim 1 wherein the seawater pump top, seawater manifold and vent points are in communication.
9. The seawater manifold for a bubble drag reducing system of claim 1, wherein the seawater manifold is provided with seawater pumps, and the breathable site on the seawater manifold is located at the outlet of the seawater pumps.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322967932.0U CN221049883U (en) | 2023-11-03 | 2023-11-03 | Seawater main pipe suitable for bubble drag reduction system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322967932.0U CN221049883U (en) | 2023-11-03 | 2023-11-03 | Seawater main pipe suitable for bubble drag reduction system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221049883U true CN221049883U (en) | 2024-05-31 |
Family
ID=91222505
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322967932.0U Active CN221049883U (en) | 2023-11-03 | 2023-11-03 | Seawater main pipe suitable for bubble drag reduction system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221049883U (en) |
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2023
- 2023-11-03 CN CN202322967932.0U patent/CN221049883U/en active Active
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