CN116053506A - Fuel cell nitrogen protection cover - Google Patents
Fuel cell nitrogen protection cover Download PDFInfo
- Publication number
- CN116053506A CN116053506A CN202310076239.6A CN202310076239A CN116053506A CN 116053506 A CN116053506 A CN 116053506A CN 202310076239 A CN202310076239 A CN 202310076239A CN 116053506 A CN116053506 A CN 116053506A
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- China
- Prior art keywords
- housing
- fuel cell
- nitrogen protection
- cover shell
- protection cover
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/02—Details
- H01M8/0271—Sealing or supporting means around electrodes, matrices or membranes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H21/00—Use of propulsion power plant or units on vessels
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/02—Details
- H01M8/0271—Sealing or supporting means around electrodes, matrices or membranes
- H01M8/0276—Sealing means characterised by their form
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H21/00—Use of propulsion power plant or units on vessels
- B63H2021/003—Use of propulsion power plant or units on vessels the power plant using fuel cells for energy supply or accumulation, e.g. for buffering photovoltaic energy
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2250/00—Fuel cells for particular applications; Specific features of fuel cell system
- H01M2250/20—Fuel cells in motive systems, e.g. vehicle, ship, plane
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- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Manufacturing & Machinery (AREA)
- Life Sciences & Earth Sciences (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Fuel Cell (AREA)
Abstract
The invention relates to the technical field of fuel cells of hydrogen energy ships, in particular to a fuel cell nitrogen protection cover, which comprises an upper cover shell, a lower cover shell, a nitrogen pressure tank and a pressure relief valve, wherein the upper cover shell is arranged on the upper cover shell; the lower housing is fixed on a deck of the ship and surrounds the fuel cell, and comprises an inner housing and an outer housing, and sealing liquid is filled between the inner housing and the outer housing; the upper housing covers the fuel cell, and the lower end of the side wall of the upper housing is inserted into sealing liquid between the inner housing and the outer housing; through immersing the sealing liquid in the lower housing with last housing lateral wall lower extreme in, fill nitrogen gas in the guard shield simultaneously, keep the micro-positive pressure in the guard shield, reach the effect that has good leakproofness, the outer side of lower housing and last housing is through setting up sealed ring flange, has reached the stable and convenient effect of dismantling of guard shield, this application is with the form of liquid seal around gas tightness technology difficult problem, conveniently dismantle when taking into account the gas tightness, and make the degree of difficulty low, the production of being convenient for.
Description
Technical Field
The invention relates to the technical field of fuel cells of hydrogen energy ships, in particular to a nitrogen protection cover of a fuel cell.
Background
A ship is a vehicle capable of sailing on the water surface for transportation, and is mainly driven by fuel oil as an energy source. However, the exhaust emission standard of ships is gradually reduced in the face of the pressure of environmental pollution, and the emission of fuel cells using hydrogen as energy sources is only water and carbon dioxide, and no high-temperature combustion process exists, so that oxides such as nitrogen or sulfur are hardly emitted, and the requirements of the limitation of the exhaust emission of ships are met.
The fuel cell equipment of the hydrogen energy ship belongs to high explosion-proof grade equipment, so the fuel cell needs to work in a negative pressure or inerting state to prevent deflagration. In order to meet the working specification requirements of the fuel cell, the fuel cell is required to be covered in a protective cover, and the inside of the protective cover is in a negative pressure ventilation or airtight inerting state. However, in actual operation, because the fuel cell equipment of the hydrogen energy ship is larger, the difficulty of manufacturing a large-sized sealing nitrogen protection cover is high, the cost is high, and meanwhile, the fuel cell protection cover for the hydrogen energy ship is extremely large in manufacturing difficulty, high in cost and poor in effect, and the protection cover is required to be conveniently detached when the fuel cell is frequently overhauled and maintained, so that the manufacturing difficulty of air tightness is considered when the fuel cell protection cover for the hydrogen energy ship is convenient to detach.
Disclosure of Invention
In order to solve the technical problems, the invention provides a nitrogen protection cover for a fuel cell, which solves the problems that the manufacturing difficulty of a large-scale sealing nitrogen protection cover in the prior art is high, and the convenience in disassembly is difficult to meet and the air tightness is simultaneously considered.
The technical scheme adopted by the invention for achieving the purpose is as follows:
a nitrogen protection cover of a fuel cell comprises an upper cover shell 1, a lower cover shell, a nitrogen pressure tank 4 and a pressure relief valve 5; the lower casing is fixed on the deck 15 of the ship and surrounds the fuel cell 14, the lower casing comprises an inner casing 2 and an outer casing 3, and sealing liquid is filled between the inner casing 2 and the outer casing 3; the upper casing 1 is covered on the fuel cell 14, the lower end of the side wall of the upper casing 1 is inserted into the sealing liquid between the inner casing 2 and the outer casing 3, the pressure relief valve 5 is installed on the upper casing 1, and the gas outlet of the nitrogen pressure tank 4 is connected to the upper casing 1.
Preferably, the height of the inner housing 2 is higher than that of the outer housing 3, and the upper end of the inner housing 2 is of an outward bending structure.
Preferably, the outer end of the bending structure of the inner housing 2 is attached to the inner wall of the upper housing 1.
Preferably, an upper sealing flange 16 is fixed on the outer side wall of the upper housing 1, a lower sealing flange 17 corresponding to the upper sealing flange 16 is fixed on the upper end of the outer housing 3, the upper sealing flange 16 and the lower sealing flange 17 can be fixedly connected through a plurality of bolts 7, and a certain longitudinal gap is reserved between the lower end of the upper housing 1 and the deck 15.
Preferably, the side wall of the upper casing 1, the inner casing 2 and the outer casing 3 are all cylindrical, and the plurality of bolts 7 are uniformly arranged along the circumferential direction of the upper sealing flange 16.
Preferably, the inner housing 2, the outer housing 3 and the deck 15 are fixed by single-sided continuous welding; the upper housing 1 is of a welding structure, and each welding seam is single-sided continuous welding.
Preferably, a liquid level meter 8 is arranged on the outer side of the outer shell 3, an overflow port is arranged on the upper portion of the liquid level meter 8, a low-level alarm 9 is arranged on the inner side of the outer shell 3, and a plurality of high-level overflow holes 10 are formed in the outer shell 3.
Preferably, the upper housing 1 is provided with a pressure gauge 11.
Preferably, the sealing liquid is water.
Preferably, the automatic water pump 6 and the water tank 12 are also included, the automatic water pump 6 is connected with the water tank 12, a water outlet of the water tank 12 is connected between the inner housing 2 and the outer housing 3, and a ventilation cap 13 is arranged at the top of the water tank 12.
The fuel cell nitrogen protection cover adopting the technical scheme has the advantages that:
the safety cover divide into housing and lower housing, go up the lateral wall lower extreme of housing and insert down in the housing to in the sealing liquid in the housing down, fill nitrogen gas in the safety cover simultaneously, keep the micro-positive pressure in the safety cover, reach the effect that has good leakproofness, lower housing and the outside of last housing are through setting up sealed ring flange, reached the stable and convenient effect of dismantling of safety cover, this application is with the form of liquid seal around gas tightness technology difficult problem, conveniently dismantle when taking into account the gas tightness, and the manufacturing degree of difficulty is low, the production of being convenient for.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention.
In the figure: 1. an upper housing; 2. an inner cover; 3. an outer shell; 4. a nitrogen pressure tank; 5. a pressure release valve; 6. an automatic water pump; 7. a bolt; 8. a liquid level gauge; 9. an alarm; 10. an overflow aperture; 11. a pressure gauge; 12. a water tank; 13. an air permeable cap; 14. a fuel cell; 15. a deck; 16. a sealing flange is arranged on the upper sealing flange; 17. and a lower sealing flange.
Detailed Description
Embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are illustrative of the invention but are not intended to limit the scope of the invention.
As shown in fig. 1, the nitrogen protection cover for the fuel cell provided by the embodiment comprises an upper cover shell 1, a lower cover shell, a nitrogen pressure tank 4 and a pressure relief valve 5; the lower casing is fixed on the deck 15 of the ship and surrounds the fuel cell 14, the lower casing comprises an inner casing 2 and an outer casing 3, and sealing liquid is filled between the inner casing 2 and the outer casing 3; the upper casing 1 covers the fuel cell 14, the lower end of the side wall of the upper casing 1 is inserted into the sealing liquid between the inner casing 2 and the outer casing 3 to ensure the air tightness of the protective cover, the pressure release valve 5 is arranged on the upper casing 1, and the air outlet of the nitrogen pressure tank 4 is connected to the upper casing 1.
The height of the inner housing 2 is higher than that of the outer housing 3, when the liquid level in the lower housing is too high, liquid can flow out through the upper end of the outer housing 3, so that the liquid can be prevented from entering the protective cover to damage the fuel cell 14, the upper end of the inner housing 2 is of an outward bending structure, the bending structure of the inner housing 2 is attached to the inner wall of the upper housing 1, the liquid level is blocked, and the liquid can be prevented from splashing into the protective cover.
The outer side wall of the upper housing 1 is fixedly provided with an upper sealing flange 16, the upper end of the outer housing 3 is fixedly provided with a lower sealing flange 17 corresponding to the upper sealing flange 16, the upper sealing flange 16 and the lower sealing flange 17 can be fixedly connected through a plurality of bolts 7, a certain longitudinal gap is reserved between the lower end of the upper housing 1 and the deck 15, the outer side wall of the upper housing 1, the inner housing 2 and the outer housing 3 are cylindrical, the plurality of bolts 7 are uniformly arranged along the upper sealing flange 16, a certain longitudinal gap is reserved between the lower end of the housing 1 and the deck 15, liquid fully submerges the lower end of the upper housing 1, the liquid level of the liquid on two sides of the upper housing 1 in the lower housing is consistent, the air tightness is improved, the tight joint between the upper sealing flange 16 and the lower sealing flange 17 is facilitated, the upper housing 1 can be removed from the lower housing only after the plurality of bolts 7 are required to be disassembled during disassembly, and the disassembly is convenient, and the overhaul and maintenance of the fuel cell 14 are facilitated.
The inner housing 2, the outer housing 3 and the deck 15 are fixed by single-sided continuous welding; the upper housing 1 is of a welding structure, each welding line is single-sided continuous welding, and the single-sided continuous welding greatly improves the air tightness of the protective cover.
The outer side of the outer shell 3 is provided with a liquid level meter 8, the upper part of the liquid level meter 8 is provided with an overflow port, the inner side of the outer shell 3 is provided with a low-level alarm 9, and the outer shell 3 is provided with a plurality of high-level overflow holes 10, so that the liquid level is ensured to be between the low-level alarm 9 and the high-level overflow holes 10, and the liquid level provides effective airtight protection for equipment.
The upper housing 1 is provided with the pressure gauge 11 for detecting the pressure of the gas in the protective cover, so that hidden danger caused by overlarge or insufficient air pressure is avoided.
The pressure release valve 5 is installed on the upper housing 1, the gas outlet of the nitrogen pressure tank 4 is connected to the upper housing 1, and the nitrogen pressure tank 4 injects nitrogen into the protective cover to ensure that the fuel cell 14 works in an inert environment. If the internal pressure is too high, or a certain amount of air exists in the air to be discharged, the pressure relief valve 5 is opened for adjustment, so that the micro-positive pressure inert environment in the air is maintained, and the effect of good sealing performance is achieved.
The automatic water pump 6 is connected with the water tank 12, a water outlet of the water tank 12 is connected between the inner housing 2 and the outer housing 3, and a ventilation cap 13 is arranged at the top of the water tank 12 and used for keeping the height of the liquid level in the lower housing.
Working principle:
when the fuel cell 14 works, the automatic water pump 6 presses a water source into the water tank 12, water enters the lower housing through the water tank 12, the lower end of the side wall of the upper housing 1 is submerged, the purpose of isolating the inner space of the protective cover from the outer space is achieved by utilizing the water, and the effect of enabling the protective cover to have air tightness is achieved. When the water in the lower housing is reduced due to evaporation and the like, the water in the water tank 12 flows into the lower housing according to the principle of the communicating vessel, and the water level is kept substantially unchanged. When the water in the water tank 12 is insufficient, the automatic water pump 6 starts to fill the water tank 12 until the water level in the lower housing approaches the overflow hole 10, and the ventilation cap 13 enables the water tank 12 and the lower housing to be a communicating vessel.
Simultaneously, the nitrogen pressure tank 4 conveys nitrogen into the protective cover, so that the gas pressure in the protective cover is higher than the gas pressure outside the protective cover, air and redundant nitrogen are discharged out of the protective cover through the pressure relief valve 5 of the upper housing 1, then the hydraulic valve 5 is closed, the micro-positive pressure is kept in the housing, the external air is prevented from entering the protective cover, the fuel cell 14 works under the surrounding of inert gas, and potential safety hazards are avoided.
The water level in the lower housing is detected in real time through the transparent liquid level meter 8 on the outer side of the outer housing 3, and the water level in the lower housing is adjusted through the transparent liquid level meter 8 and the overflow port on the outer housing 3, so that the air tightness is maintained and excessive water loss is avoided; the low-level alarm 9 arranged on the inner side of the outer housing 3 monitors the water level in real time, and gives an alarm when the water level is too low, so that the situation that the lower end of the side wall of the upper housing 1 cannot be immersed by the water level, the inner space of the protective cover is identical to the outer space, and the air tightness of the protective cover is improved is avoided.
The manometer 11 on the outer housing 3 carries out real-time supervision to the gas pressure in the safety cover, avoids the safety cover to have too big atmospheric pressure, presses out the housing with water completely, causes the nitrogen leakage loss, avoids simultaneously that the gas pressure is too little in the safety cover, stops the possibility that safety cover outside space gas enters into the safety cover through clearance such as bleeder valve for fuel cell 14 constantly works under the protection of nitrogen gas, has improved the gas tightness of safety cover.
The present invention has been described in terms of embodiments, and it will be appreciated by those of skill in the art that various changes can be made to the features and embodiments, or equivalents can be substituted, without departing from the spirit and scope of the invention. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the invention without departing from the essential scope thereof. Therefore, it is intended that the invention not be limited to the particular embodiment disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.
Claims (10)
1. The nitrogen protection cover of the fuel cell is characterized by comprising an upper cover shell (1), a lower cover shell, a nitrogen pressure tank (4) and a pressure relief valve (5); the lower housing is fixed on a deck (15) of the ship and surrounds the fuel cell (14), the lower housing comprises an inner housing (2) and an outer housing (3), and sealing liquid is filled between the inner housing (2) and the outer housing (3); the upper housing (1) covers the fuel cell (14), the lower end of the side wall of the upper housing (1) is inserted into sealing liquid between the inner housing (2) and the outer housing (3), the pressure release valve (5) is arranged on the upper housing (1), and the air outlet of the nitrogen pressure tank (4) is connected to the upper housing (1).
2. A fuel cell nitrogen protection cover according to claim 1, characterized in that the inner cover (2) is higher than the outer cover (3), and the upper end of the inner cover (2) is of an outward bending structure.
3. A fuel cell nitrogen protection cover according to claim 2, characterized in that the outer end of the bent structure of the inner casing (2) is attached to the inner wall of the upper casing (1).
4. The nitrogen protection cover for the fuel cell according to claim 1, wherein an upper sealing flange plate (16) is fixed on the outer side wall of the upper cover shell (1), a lower sealing flange plate (17) corresponding to the upper sealing flange plate (16) is fixed at the upper end of the outer cover shell (3), the upper sealing flange plate (16) and the lower sealing flange plate (17) can be fixedly connected through a plurality of bolts (7), and a certain longitudinal gap is reserved between the lower end of the upper cover shell (1) and a deck plate (15).
5. A fuel cell nitrogen protection cover according to claim 4, characterized in that the side wall of the upper casing (1), the inner casing (2) and the outer casing (3) are all cylindrical, and a plurality of bolts (7) are uniformly arranged along the circumferential direction of the upper sealing flange (16).
6. A fuel cell nitrogen protection cover according to claim 1, characterized in that the inner cover shell (2) and the outer cover shell (3) are fixed with the deck (15) surface by single-sided continuous welding; the upper housing (1) is of a welding structure, and each welding seam is single-sided continuous welding.
7. The nitrogen protection cover for the fuel cell, according to claim 1, is characterized in that a liquid level meter (8) is arranged on the outer side of the outer cover shell (3), an overflow port is arranged on the upper portion of the liquid level meter (8), a low-level alarm (9) is arranged on the inner side of the outer cover shell (3), and a plurality of high-level overflow holes (10) are formed in the outer cover shell (3).
8. A fuel cell nitrogen protection cover according to claim 1, characterized in that the upper casing (1) is provided with a pressure gauge (11).
9. The nitrogen protection cover for a fuel cell of claim 1, wherein said sealing liquid is water.
10. A fuel cell nitrogen protection cover according to claim 9, further comprising an automatic water pump (6) and a water tank (12), wherein the automatic water pump (6) is connected with the water tank (12), a water outlet of the water tank (12) is connected between the inner housing (2) and the outer housing (3), and a ventilation cap (13) is arranged at the top of the water tank (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310076239.6A CN116053506A (en) | 2023-02-08 | 2023-02-08 | Fuel cell nitrogen protection cover |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310076239.6A CN116053506A (en) | 2023-02-08 | 2023-02-08 | Fuel cell nitrogen protection cover |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116053506A true CN116053506A (en) | 2023-05-02 |
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ID=86113183
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310076239.6A Pending CN116053506A (en) | 2023-02-08 | 2023-02-08 | Fuel cell nitrogen protection cover |
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| Country | Link |
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| CN (1) | CN116053506A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118156559A (en) * | 2024-05-11 | 2024-06-07 | 武汉船用电力推进装置研究所(中国船舶集团有限公司第七一二研究所) | Nitrogen supply device and method for fuel cell in enclosed space |
-
2023
- 2023-02-08 CN CN202310076239.6A patent/CN116053506A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118156559A (en) * | 2024-05-11 | 2024-06-07 | 武汉船用电力推进装置研究所(中国船舶集团有限公司第七一二研究所) | Nitrogen supply device and method for fuel cell in enclosed space |
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