CN113335490B - Double-wall pipe ventilation system and ship - Google Patents
Double-wall pipe ventilation system and ship Download PDFInfo
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- CN113335490B CN113335490B CN202110736746.9A CN202110736746A CN113335490B CN 113335490 B CN113335490 B CN 113335490B CN 202110736746 A CN202110736746 A CN 202110736746A CN 113335490 B CN113335490 B CN 113335490B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63J—AUXILIARIES ON VESSELS
- B63J2/00—Arrangements of ventilation, heating, cooling, or air-conditioning
- B63J2/02—Ventilation; Air-conditioning
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63J—AUXILIARIES ON VESSELS
- B63J2/00—Arrangements of ventilation, heating, cooling, or air-conditioning
- B63J2/02—Ventilation; Air-conditioning
- B63J2/10—Ventilating-shafts; Air-scoops
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- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
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Abstract
The invention relates to the technical field of ships and discloses a double-wall pipe ventilation system and a ship. The double-wall pipe ventilation system is used for ventilating an annular space between an inner wall pipe and an outer wall pipe of the double-wall pipe, the annular space is provided with a ventilation inlet and a ventilation outlet, methanol flows in the inner wall pipe of the double-wall pipe, the double-wall pipe ventilation system comprises a pipeline, one end of the pipeline is provided with an air inlet, the other end of the pipeline is provided with a fan, the ventilation inlet is communicated with the air inlet, the ventilation outlet is communicated with the fan, and the fan is arranged at the top of the methanol pump cabin; the double-wall pipe is arranged in the engine room, the air inlet is arranged close to the ventilation inlet and the ventilation outlet, and the pipeline is arranged on the upper building front wall and the A deck and communicated to the fan. The fan is arranged at the top of the methanol pump cabin, so that on one hand, the continuous ventilation of the annular space is ensured; on one hand, the seawater can be prevented from entering the air inlet, the maintenance of the fan is convenient, and when the methanol in the inner wall pipe of the double-wall pipe leaks, the methanol can be found and treated in time, which is favorable for ensuring the safety of the ship.
Description
Technical Field
The invention relates to the technical field of ships, in particular to a double-wall pipe ventilation system and a ship.
Background
The methanol is used as a new technology used at present, and has the inherent advantages of low cost, easy preparation, liquid state at normal temperature (convenient transportation, filling and storage), and the like which can be used as fuel. Because methanol is poisonous, in order to guarantee the safety of ship driving, in the process of methanol transportation, the pipeline after entering the engine room adopts a double-wall pipe structure, and an exhaust fan is arranged to continuously and mechanically ventilate the annular space of the double-wall pipe inner and outer wall pipes, so that the safety of the methanol transportation pipeline and the methanol leakage can be timely discovered and treated, and the safety of the ship is guaranteed.
The ventilation inlet and outlet of the double-wall pipe are higher than the main deck by more than 4.5 meters so as to prevent seawater from entering; the range of the double-wall pipe ventilation inlet within 3 meters and the range of the double-wall pipe ventilation outlet within 4.5 meters are dangerous areas, and the ventilation inlet and the ventilation outlet need to be far away as possible, which has certain requirements on the positions of the air inlet and the air outlet. If the fan is arranged in a safe area, if the ventilation pipeline leaks, the safe area can become a dangerous area, and the safety of the ship is affected.
Therefore, a double-wall pipe ventilation system is needed to solve the above problems.
Disclosure of Invention
Based on the above, the invention aims to provide a double-wall pipe ventilation system and a ship, which are good in ventilation effect and high in safety coefficient.
In order to achieve the purpose, the invention adopts the following technical scheme:
a double-walled pipe ventilation system for ventilating an annular space between inner and outer wall pipes of a double-walled pipe, the annular space being provided with an inlet vent and an outlet vent, methanol being circulated within the inner wall pipe of the double-walled pipe, the double-walled pipe ventilation system comprising:
the device comprises a pipeline, a fan and a gas pump cabin, wherein one end of the pipeline is provided with an air inlet, the other end of the pipeline is provided with the fan, the air inlet is communicated with the air inlet, the air outlet is communicated between the fans, and the fan is arranged at the top of the methanol pump cabin; the air inlet and the air outlet are arranged in the cabin, the air inlet is arranged close to the air inlet and the air outlet, and the pipeline is arranged on the upper building front wall and the top wall of the deck A and communicated to the fan.
As a preferred scheme of the double-wall pipe ventilation system, the double-wall pipe ventilation system further comprises a pressure reducing valve group arranged between the air inlet and the ventilation inlet, and an overflow port is arranged between the pressure reducing valve group and the ventilation outlet.
As a preferred scheme of the double-wall pipe ventilation system, flow sensors are arranged between the overflow port and the pressure reducing valve group and at one end of the overflow port far away from the pressure reducing valve component.
As a preferred scheme of the double-wall pipe ventilation system, the pressure reducing valve group is arranged between the deck A and the methanol pump cabin, and the extension direction of the pressure reducing valve group is parallel to the side edge of one side, close to the methanol pump cabin, of the deck A.
As a preferable scheme of the double-wall pipe ventilation system, one end of the outlet of the fan is provided with a throttling piece.
As a preferable mode of the double-wall pipe ventilation system, a switch valve is provided between the air inlet and the air inlet, and/or between the air outlet and the blower.
As a preferable scheme of the double-wall pipe ventilation system, a gas detection piece is arranged at the position, close to the inlet of the fan, of the pipeline.
As a preferable scheme of the double-wall pipe ventilation system, a fan chamber is arranged at the top of the methanol pump cabin, and the fan is arranged in the fan chamber.
As a double-walled pipe ventilation system's preferred scheme, still include the detection pipeline, it is provided with check valve and ooff valve to detect the pipeline, detect the pipeline with the annular space intercommunication of double-walled pipe to the annular space of double-walled pipe lets in compressed gas.
As a preferred scheme of the double-wall pipe ventilation system, the double-wall pipe ventilation system further comprises bypass valves arranged at the inlet and the outlet of the fan.
A vessel comprising a double-walled pipe ventilation system as claimed in any preceding aspect.
The invention has the beneficial effects that:
the double-wall-pipe methanol-methanol separator is provided with the air inlet and the fan and is used for ventilating an annular space between the inner wall pipe and the outer wall pipe of the double-wall pipe, the ventilation capacity needs to meet the requirement that the number of times of air exchange is 30 times/hour, the state that the annular space between the inner wall pipe and the outer wall pipe of the double-wall pipe has certain pressure is maintained, the isolation between methanol in the inner pipe of the double-wall pipe and a safe area of a cabin is ensured, the methanol is prevented from leaking into the cabin due to the damage of the inner pipe of the double-wall pipe, the methanol can be discharged out of the cabin and found and treated at the fastest speed once leaking, the leakage of the methanol in the double-wall pipe is effectively avoided, and the driving safety is further ensured; simultaneously, set up the fan at the top in methyl alcohol pump cabin, the maintenance of the fan of being convenient for on the one hand, on the other hand, even the pipeline of connecting the fan takes place the damage, can not influence other safe region's of boats and ships scope yet, is favorable to guaranteeing the security of boats and ships.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required to be used in the description of the embodiments of the present invention will be briefly described below, and it is obvious that the drawings in the description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings may be obtained according to the contents of the embodiments of the present invention and the drawings without creative efforts.
FIG. 1 is a schematic view of a double-walled tube ventilation system according to an embodiment of the present invention;
figure 2 is a schematic diagram of a double-walled tube ventilation system according to an embodiment of the present invention.
In the figure:
111. a ventilation inlet; 112. a vent outlet; 120. a methanol pump cabin; 130. a fan chamber; 140. a, a deck; 150. building a front wall;
1. an air inlet; 2. a fan; 3. a pressure relief valve bank; 4. an overflow port; 5. a flow sensor; 6. a throttle member; 7. a first on-off valve; 8. a gas detection member; 9. detecting a pipeline; 10. a second on-off valve; 11. a check valve; 12. a pressure sensor; 13. a measurement port; 14. a bypass valve; 15. and (7) an outlet.
Detailed Description
In order to make the technical problems solved, technical solutions adopted and technical effects achieved by the present invention clearer, the technical solutions of the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1 and fig. 2, the present embodiment provides a double-walled pipe ventilation system for a ship, the double-walled pipe ventilation system is used for ventilating an annular space between an inner pipe and an outer pipe of a double-walled pipe, the annular space is provided with a ventilation inlet 111 and a ventilation outlet 112, methanol flows through the inner pipe of the double-walled pipe, the double-walled pipe ventilation system comprises a pipe, one end of the pipe is provided with an air inlet 1, the other end of the pipe is provided with a fan 2, the ventilation inlet 111 is communicated with the air inlet 1, the ventilation outlet 112 is communicated with the fan 2, and the fan 2 is arranged at the top of a methanol pump room 120; the ventilation inlet 111 and the ventilation outlet 112 are arranged in the cabin area, specifically at the through position of the main deck, the air inlet 1 is arranged near the ventilation inlet 111 and the ventilation outlet 112, and the pipeline is arranged on the top walls of the upper building front wall 150 and the A deck 140 and communicated to the fan 2.
Through setting up air intlet 1 and fan 2 for annular space between the interior outer wall pipe to setting up the double-walled pipe on the pipeline ventilates, and ventilation capacity needs to satisfy trade wind number of times 30 times/hour, maintain the state that annular space has certain pressure between the interior outer wall pipe of double-walled pipe, guarantee the isolation of the intraductal methyl alcohol of inner wall of double-walled pipe and cabin safe region, in order to prevent to lead to methyl alcohol to leak to the cabin because of damaging in the inner wall pipe, guarantee methyl alcohol once reveal can discharge the cabin with the fastest speed and discover, handle, the leakage of the intraductal methyl alcohol of inner wall has been avoided effectively, and then guarantee the security of traveling. Meanwhile, the fan 2 is arranged at the top of the methanol pump cabin 120, so that the maintenance of the fan 2 is facilitated on one hand; on the other hand, even if the related connecting pipeline of the fan 2 leaks, the range of other safe regions of the ship is not affected, and the safety of the ship is favorably ensured.
Specifically, the top of the methanol pump cabin 120 is provided with the fan chamber 130, and the fan 2 is arranged in the fan chamber 130, it can be understood that the methanol processing unit is arranged in the methanol pump cabin 120, and belongs to a dangerous area on a ship, and the fan 2 with the same leakage risk is arranged in the dangerous area, so that the maintenance is facilitated, the number and the range of the dangerous area of the ship cannot be increased, and the safety is better.
In this embodiment, air inlet 1 intercommunication has air compressor to carry high-pressure gas in to the pipeline, guarantee the ventilation effect between the interior outer wall pipe clearance of double-walled pipe. Illustratively, the high pressure air entering the duct from the air inlet 1 is 3MPa. Further, for avoiding double-walled pipe air pressure too big in, double-walled pipe ventilation system is still including setting up the pressure reducing valve group 3 between air intlet 1 and ventilation intlet 111, be provided with overflow mouth 4 between pressure reducing valve group 3 and the ventilation intlet 111, through pressure reducing valve group 3, can adjust the gas pressure who enters into in the annular space of double-walled pipe to be higher than atmospheric pressure a little, in order to guarantee that overflow mouth 4 has slight gas overflow to come out always, can ensure like this that the gas that enters into in the annular space of double-walled pipe all is the dry gas after the decompression.
Optionally, for detecting whether decompression valve group 3 adjusts high-pressure air to suitable pressure, between overflow mouth 4 and decompression valve group 3 to and overflow mouth 4 keeps away from the one end of decompression valve group 3 and all is provided with flow sensor 5, through the pipeline flow difference that passes through between two flow sensor 5, can guarantee that the atmosphere can not enter into the annular space of double-walled pipe through overflow mouth 4. A detection port 13 is further provided between the overflow port 4 and the ventilation inlet 111, and the detection port 13 serves as a backup port for manually detecting the air volume when the flow sensor 5 is damaged or the like cannot detect the air volume.
Further, the front end of the outlet 15 of the fan 2 is provided with a throttle 6, and the throttle 6 may be provided as a throttle plate or a throttle valve. By adjusting the throttle 6, the flow of the ventilation can be adjusted so that the ventilation system can obtain the lowest required flow while ensuring the number of air changes of 30 times/hour. The inlet and the outlet 15 of the fan 2 are provided with a bypass valve 14, and the gas at the outlet 15 of the fan 2 can be discharged back to the inlet of the fan 2 by adjusting the opening of the bypass valve 14, so as to adjust the outlet flow of the fan 2. A pressure sensor 12 is also provided between the ventilation outlet 112 and the fan 2 and is operative to sense pressure on the line to monitor the pressure in the ventilation line at any time.
Preferably, a first switch valve 7 is arranged between the ventilation inlet 111 and the air inlet 1 and/or between the ventilation outlet 112 and the fan 2, and the first switch valve 7 is arranged to disconnect different positions of the pipeline, so as to facilitate maintenance of parts at different positions on the pipeline, and to ensure the safety of maintenance personnel.
Illustratively, air from the air inlet 1 enters the annular space of the double-walled tube through the ventilation inlet 111 and exits the annular space of the double-walled tube through the ventilation outlet 112. The first switch valve 7 between the ventilation inlet 111 and the air inlet 1 is arranged between the pressure reducing valve group 3 and the ventilation inlet 111, and when the first switch valve 7 is disconnected, the first switch valve can be used for overhauling the pressure reducing valve group 3; the first switch valve 7 arranged between the ventilation outlet 112 and the fan 2 is arranged close to the fan 2, high-pressure air in the pipeline enters an annular space between the inner wall pipe and the outer wall pipe of the double-wall pipe through the double-wall pipe ventilation inlet 111, flows out of the annular space of the inner wall pipe and the outer wall pipe of the double-wall pipe through the double-wall pipe ventilation outlet 112, and can be used for overhauling the pipeline and the ventilation inlet 111 and the ventilation outlet 112 when the first switch valve 7 between the ventilation outlet 112 and the fan 2 is disconnected.
Further preferably, the end of the pipeline close to the fan 2 is provided with a gas detection piece 8, and it is worth explaining that the gas detection piece 8 arranged on the pipeline can rapidly monitor whether the double-wall pipe is damaged, so that the methanol is effectively prevented from leaking to the engine room, and the safety of other safe regions of the ship is ensured.
In this embodiment, for guaranteeing the security of double-walled pipe, still need detect double-walled pipe before the pipeline ventilates, double-walled pipe ventilation system is still including detecting pipeline 9, and it is provided with check valve 11 and second ooff valve 10 to detect pipeline 9, and the annular space intercommunication of detecting pipeline 9 and double-walled pipe closes first ooff valve 7, opens second ooff valve 10 back, lets in compressed gas to the annular space of double-walled pipe, and whether the pressure of the interior outer wall clearance that detects the pipeline 9 through letting in double-walled pipe has the decline in the detection phase, if there is the decline, it leaks to explain double-walled pipe existence, can not normal use, can guarantee double-walled pipe and ventilation system's security and reliability like this. The check valve 11 is provided to prevent the gas in the double-walled pipe from flowing back into the test line 9.
For the structure of adaptation boats and ships, avoid pipeline and boats and ships to have the structure to take place to interfere, pressure-reducing valve group 3 sets up on A deck 140, and 3 extending direction of pressure-reducing valve group set up with A deck 140's side parallel, are favorable to reducing the area occupied of pipeline and the aesthetic property of guaranteeing to arrange. In addition, the pressure reducing valve group 3 is arranged above the a deck 140 and is parallel to the a deck 140, so that the first switch valve 7, the flow sensor 5 and the like can be conveniently arranged, and the operation, adjustment, maintenance and the like of the pipeline can be conveniently realized.
This embodiment still discloses a boats and ships, especially a boats and ships that fuel was made to methyl alcohol, includes as above arbitrary scheme double-walled pipe ventilation system, the methyl alcohol fuel boats and ships ventilation effect that adopt this double-walled pipe ventilation system is good, and factor of safety is high.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in some detail by the above embodiments, the invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the invention, and the scope of the invention is determined by the scope of the appended claims.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Wherein the terms "first position" and "second position" are two different positions.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in a specific case to those of ordinary skill in the art.
Claims (10)
1. A double-walled pipe ventilation system to ventilate an annular space between inner and outer wall pipes of a double-walled pipe, the annular space being provided with an inlet (111) and an outlet (112) for ventilation, methanol having flowed through inner wall pipes of the double-walled pipe, the double-walled pipe ventilation system comprising:
the device comprises a pipeline, wherein one end of the pipeline is provided with an air inlet (1), the other end of the pipeline is communicated to a fan (2), the ventilating inlet (111) is communicated with the air inlet (1), the ventilating outlet (112) is communicated with the fan (2), and the fan (2) is arranged at the top of a methanol pump cabin (120); the ventilating inlet (111) and the ventilating outlet (112) are arranged in a cabin area, the air inlet (1) is arranged close to the ventilating inlet (111) and the ventilating outlet (112), and the pipeline is arranged on the top wall and the upper building front wall (150) of the A deck (140) and communicated to the fan (2).
2. The double-walled tube ventilation system according to claim 1, further comprising a pressure relief valve block (3) disposed between the air inlet (1) and the ventilation inlet (111), an overflow port (4) being disposed between the pressure relief valve block (3) and the ventilation inlet (111).
3. Double-walled tube ventilation system according to claim 2, characterized in that flow sensors (5) are provided both between the overflow opening (4) and the pressure reducing valve block (3), and at the end of the overflow opening (4) remote from the pressure reducing valve block (3).
4. The double-walled tube ventilation system according to claim 2, wherein the pressure reducing valve block (3) is disposed between the a deck (140) and the methanol pump compartment (120), and the extension direction of the pressure reducing valve block (3) is parallel to a side of the a deck (140) on a side close to the methanol pump compartment (120).
5. Double-walled tube ventilation system according to any of claims 1-4, characterized in that the outlet (15) of the fan (2) is provided with a throttle element (6) at one end.
6. Double-walled tube ventilation system according to any of claims 1-4, characterized in that a first switch valve (7) is arranged between the air inlet (111) and the air inlet (1) and/or between the air outlet (112) and the fan (2).
7. Double-walled tube ventilation system according to any of claims 1-4, characterized in that said tube is provided with a gas detection member (8) at the end of said tube close to the inlet of said fan (2).
8. Double-walled tube ventilation system according to any of claims 1 to 4, characterized in that it further comprises a detection line (9), said detection line (9) being provided with a non-return valve (11) and a second on-off valve (10), said detection line (9) being in communication with the annular space of the double-walled tube for feeding compressed gas to the annular space of the double-walled tube.
9. Double-walled tube ventilation system according to any of the claims 1-4, characterized in that the inlet and outlet (15) of the fan (2) are provided with bypass valves (14).
10. A ship comprising a double-walled tube ventilation system according to any one of claims 1 to 9.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110736746.9A CN113335490B (en) | 2021-06-30 | 2021-06-30 | Double-wall pipe ventilation system and ship |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110736746.9A CN113335490B (en) | 2021-06-30 | 2021-06-30 | Double-wall pipe ventilation system and ship |
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| Publication Number | Publication Date |
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| CN113335490A CN113335490A (en) | 2021-09-03 |
| CN113335490B true CN113335490B (en) | 2023-01-24 |
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| CN202110736746.9A Active CN113335490B (en) | 2021-06-30 | 2021-06-30 | Double-wall pipe ventilation system and ship |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115092331A (en) * | 2022-06-30 | 2022-09-23 | 广船国际有限公司 | Dual-fuel container ship |
| CN116443232A (en) * | 2023-06-12 | 2023-07-18 | 浙江浙能迈领环境科技有限公司 | Methanol fuel supply equipment based on ship and operation method |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101525048B (en) * | 2009-02-27 | 2012-05-30 | 沪东中华造船(集团)有限公司 | Double-wall pipeline for the connection of fuel-gas valve set and engine on LNG ship and installation method of double-wall pipeline |
| CN201951709U (en) * | 2010-11-07 | 2011-08-31 | 沪东中华造船(集团)有限公司 | Ventilation system for fuel conveying pipe of two-fuel LNG ship |
| JP6262076B2 (en) * | 2014-05-23 | 2018-01-17 | 三井造船株式会社 | Ships powered by methanol |
| KR101805495B1 (en) * | 2016-03-28 | 2017-12-07 | 대우조선해양 주식회사 | Air ventilation system through double wall pipe for supplying gas and air ventilating method by the same |
| CN107387265B (en) * | 2017-07-31 | 2019-04-05 | 江南造船(集团)有限责任公司 | High-pressure gas double-wall pipe ventilating system |
| CN209037828U (en) * | 2018-11-19 | 2019-06-28 | 山东航宇船业集团股份有限公司 | A kind of double-wall pipe ventilation device of diesel oil/LNG double fuel Power Vessel |
| CN111383094B (en) * | 2020-03-06 | 2024-06-07 | 深圳前海微众银行股份有限公司 | Product service full-chain driving method, device and readable storage medium |
| CN112199702B (en) * | 2020-10-16 | 2024-07-26 | 鹏城实验室 | Privacy protection method, storage medium and system based on federal learning |
| CN112901375B (en) * | 2021-01-29 | 2022-08-30 | 友联船厂（蛇口）有限公司 | LPG fuel supply system |
| CN113047994A (en) * | 2021-03-31 | 2021-06-29 | 广船国际有限公司 | Methanol fuel dual-fuel ship |
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