KR20110018737A - Gas supplying system for submarine - Google Patents

Abstract

PURPOSE: A gas supplying system for a submarine is provided to ensure safety in the submarine by actively coping with a trouble situation, which is involved in a fuel supplying system due to the generation of abnormal pressure and the breakdown of a depressurizer. CONSTITUTION: A gas supplying system for a submarine comprises a depressurizer(20) and a relief valve(50). The depressurizer is installed on a supply path(40) between a high-pressure gas tank(10) and a fuel cell(30) in a hull. The depressurizer enables a right pressure of gas to be supplied to the fuel cell. The relief valve blocks the supply path of the gas, which is supplied to the fuel cell, if a supply pressure on the rear of the depressurizer is excessive. The relief valve comprises a drain path(60) for draining the gas, which is supplied to the fuel cell. The depressurizer comprises a first depressurizer and a second depressurizer, which depressurizes the supply pressure of the gas to a right one.

Description

Gas supplying system for submarine

The present invention relates to a gas supply apparatus applied to a fuel cell facility of a submarine, and more particularly, to supply a high pressure gas to a fuel cell by depressurizing a high pressure gas from a high pressure gas storage tank installed inside a closed pressure hull. The present invention relates to a gas supply device for a submarine, which ensures safety against occurrence of abnormal pressure and breakdown of the pressure reducer.

In general, the use of fuel cells in addition to batteries as a means of energy storage in submarines, particularly military submarines, has been greatly increased. Such fuel cells convert chemical energy generated by oxidation of fuel directly into electrical energy. It is a kind of high-efficiency pollution-free power generation equipment characterized by supplying gaseous reactants such as hydrogen continuously from the outside to generate electricity and discharging the generated materials after the reaction to the outside of the reaction system continuously. .

That is, a fuel cell is like a normal chemical cell in that it uses oxidation and reduction reactions of a reactant, but unlike a chemical cell that performs a cell reaction in an enclosed system, the reactant is continuously The difference is that after being supplied and the reaction product is continuously discharged out of the system, the most typical example is a hydrogen-oxygen fuel cell.

In addition, in a fuel cell, the reactants are stored in a high pressure liquid state in the pressure vessel, and the pressure in these pressure vessels is in a liquid state because the pressure is much larger than the allowable pressure to ensure the stable operation of the fuel cell equipment. Phase change of the reactants into the gas phase is required to lower their pressure to an acceptable pressure level, which is realized by various types of pressure reducers.

In addition, the fuel cell is provided with a circuit breaker for blocking the occurrence of an abnormal pressure higher than the set pressure in supplying the reaction material from the pressure vessel to the fuel cell equipment. That is, the breaker cuts off the supply of the reactant to the fuel cell facility when an abnormal pressure occurs in the supply path of the reactant, and the damage and destruction of the equipment accompanying the high pressure gas of the set allowable pressure to the fuel cell facility are provided to the fuel cell facility. This function prevents such problems.

A submarine equipped with such a fuel cell is disclosed in Korean Patent Registration No. 10-0626921 (Patent Holder; Hobalt Velkke-Doi Dokbelt GmbH). In the prior art, a pressure source in a submarine pressure hull ( From the a) to the gas consumption device (b), the reaction material is supplied through the supply pipe (c), and the pressure reducer (1) is provided between the pressure source (a) and the gas consumption device (b). The pressure of the gas, which is a reactant provided to the gas consumption device (b), is reduced to an appropriate level, and the back pressure safety device (2) is provided in the supply pipe (c) from the pressure reducer (1) to the gas consumption device (b). Is installed so that the gas supply pressure rises above the set pressure to protect the gas consumption device (b).

However, in the fuel cell apparatus of the conventional submarine as described above, an abnormality caused by the failure of the pressure reducer 1 or the like in the supply pipe c corresponding to the supply path of the reactant material from the pressure source a to the gas consumption device b. Since only the back pressure safety device (2), which is a facility to cut off the pressure when it occurs, can supply the gas consumption device (b) with a reactant at an appropriate pressure when the pressure reducer (1) and the back pressure safety device (2) fail simultaneously. In addition, in extreme cases, when the supply of the gas provided to the gas consumption device (b) by the back pressure safety device (2) is continuously interrupted in the middle, the high pressure gas is leaked to the outside of the reaction system in the pressure hull of the submarine. There is a risk that can cause an explosion.

That is, in the fuel cell apparatus of the conventional submarine, only the back pressure safety device 2 which cuts off the abnormal pressure in the supply pipe c corresponding to the supply path of the reactant from the pressure source a to the gas consumption device b is generated. In case of failure of the pressure reducer (1) and the back pressure safety device (2), it is not equipped with a problem of supplying a reactant in a proper pressure state or a fundamental countermeasure for the treatment of a reactant leaking out of the reaction system.

Accordingly, the present invention has been made in view of the above-mentioned matters, and in reducing the supply of high pressure gas to an allowable pressure from a high pressure gas storage tank to a fuel cell in a submarine having a pressure hull closed to the outside, The objective is to ensure the safety of submarines by proactively coping with abnormal situations in the fuel supply system due to pressure generation and breakdown of pressure reducers.

In order to achieve the above object, the present invention provides a pressure reducer in a supply path between a high pressure gas storage tank and a fuel cell in a pressure hull, and a gas supplied to the fuel cell when the supply pressure is excessively provided at a rear end of the pressure reducer. It is characterized in that the relief valve is provided with a drain path for blocking the supply path of the drain and the gas provided to the fuel cell.

In the present invention, the pressure reducer is sequentially disposed on the supply path between the high-pressure gas storage tank and the fuel cell to a first pressure reducer and a second pressure reducer for reducing the supply pressure of the gas provided to the fuel cell to an appropriate pressure. Characterized in that made.

In the present invention, the relief valve is composed of a first relief valve and a second relief valve disposed sequentially on the supply path between the pressure reducer and the fuel cell to drain it when the supply pressure provided to the fuel cell is excessively increased. It is characterized by.

In the present invention, the flow path between the high-pressure gas storage tank and the pressure reducer further includes a flow prevention valve installed to limit the flow in the case of a rapid increase in the flow rate of the fluid or a pressure difference greater than the allowable standard It is done.

In the present invention, the relief path of the relief valve is characterized in that the pressure pump or the non-return valve is installed.

In the present invention, the drain path of the relief valve is connected to the high pressure gas storage tank, characterized in that connected to the supply path between the high pressure gas storage tank and the pressure reducer.

According to the gas supply apparatus of the submarine according to the present invention, in the pressure hull of the submarine to supply a high-pressure gas, which is a reactant provided from the high-pressure gas storage tank to the fuel cell by reducing the pressure below the set allowable pressure, and the high-pressure gas storage tank and When an abnormal pressure occurs due to damage of the pressure reducer among the supply paths provided between the fuel cells, the high pressure gas can be returned to the high pressure gas storage tank through the drain path set in the relief valve. It is possible to ensure the safety of the submarine by responding to the abnormal situation caused by the leakage of gas generated in the supply path more appropriately, and the supply pressure of the gas provided to the fuel cell can always be set below the allowable pressure. It is possible to prevent damage to the equipment due to the damage.

That is, the present invention supplies the abnormal pressure generated through the drain path of the relief valve or the pressure between the high pressure gas storage tank and the pressure reducer when an abnormal pressure higher than the allowable pressure generated in the supply path due to the failure of the pressure reducer occurs. By returning to the path, problems associated with the supply of gas in the submarine can be solved more aggressively, especially in the event of a leak of high pressure reactants due to any one pressure reducer failure or system failure and destruction. By means of the instrument, maximum redundancy can be ensured to ensure the normal operation of the gas supply.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying exemplary drawings.

As shown in FIG. 1, the first embodiment of the present invention includes a high-pressure gas storage tank 10 for storing high-pressure reactants in order to promote generation of electrical energy by a fuel cell facility in a pressure hull of a submarine. A pressure reducer 20 for reducing the gas, which is a high pressure reactant stored in the high pressure gas storage tank 10, to a predetermined proper pressure, and receives the reduced pressure reactant from the pressure reducer 20 to receive electrical energy. A fuel cell 30 for generating is provided. The fuel cell in the supply path 40 of the gas installed to reach the fuel cell 30 from the high pressure gas storage tank 10 via the pressure reducer 20 when the abnormal pressure caused by the excessive increase in supply pressure is generated. A relief valve 50 is installed to cut off the supply of the gas provided to the 30 and to drain it.

That is, the relief valve 50 is installed on the supply path 40 of the gas located at the rear end of the pressure reducer 20 in the supply path 40, and the fuel cell 30 is discharged from the pressure reducer 20. When the supply pressure of the gas provided to the lower than the set pressure is a steady state, the normal gas is supplied to the fuel cell 30, and the supply pressure of the gas decompressed through the pressure reducer 20 is higher than the set pressure. If the abnormal state is high, it does not supply gas to the fuel cell 30, and performs the function of blocking the drain in the middle. At this time, the drain path 60 of the gas branched from the relief valve 50 is connected to the high pressure gas storage tank 10, the gas drained through the relief valve 50 is the high pressure gas storage tank ( Is returned.

As shown in FIG. 2, the second embodiment of the present invention has the pressure reducer 20 on the supply path 40 of the gas disposed between the high pressure gas storage tank 10 and the relief valve 50. The pressure reducer 20 is divided into a first reducer 22 and a second reducer 24, and the first reducer 22 and the second reducer are formed. 24 is sequentially installed in the supply path 40 of the gas located between the high-pressure gas storage tank 10 and the relief valve 50.

Each of the first and second decompressors 22 and 24 performs a function of lowering the degree of decompression of the high pressure reactant provided from the high pressure gas storage tank 10 to a predetermined level, and finally the first The supply pressure of the gas provided to the relief valve 50 through the two reducer 20 is adjusted to a normal state below the set pressure.

That is, the first reducer 22 performs a function of reducing the high pressure reactant provided from the high pressure gas storage tank 10 to the fuel cell 30 to a set pressure or less, and the second reducer 24 is a high pressure reactant provided from the high pressure gas storage tank 10 to the fuel cell 30 when the normal function due to the damage of the first reducer 22 is not performed. Auxiliary function to depressurize is performed.

Even in this case, the relief valve 50 located at the rear end of the second reducer 24 supplies the high-pressure reactant to the fuel cell when the supply pressure of the gas provided from the second reducer 24 is in a steady state. 30), but if abnormal, the supply is cut off and returned to the high pressure gas storage tank 10 through the drain path 60.

In other words, according to the second embodiment of the present invention, the first pressure reducer 22 and the second pressure reducer 24 are disposed in the supply path 40 between the high pressure gas storage tank 10 and the relief valve 50. Other configurations are provided in the same manner as in the first embodiment except for the sequentially installed configurations.

In the third embodiment of the present invention, as shown in FIG. 3, a plurality of relief valves 50 are provided on a supply path 40 of gas disposed between the pressure reducer 20 and the fuel cell 30. In this case, the relief valve 50 is divided into a first relief valve 52 and a second relief valve 54, and the first relief valve 52 and the second relief valve ( 54 is sequentially installed in the supply path 40 of the gas located between the pressure reducer 20 and the fuel cell 30.

Each of the first and second relief valves 52 and 54 may include a pressure reducer 20 or a specific relief on a gas supply path 40 between the high pressure gas storage tank 10 and the fuel cell 30. If one of the valves 52, 54 fails, the other will perform its function.

For example, when the abnormal pressure is generated through the supply path 40 according to the failure of the pressure reducer 20, the first relief valve 52 eliminates it through the first drain path 62 and the second When the relief valve 54 generates an abnormal pressure caused by a failure of the first relief valve 52, the relief valve 54 eliminates it through the second drain path 64.

That is, according to the third embodiment of the present invention, the first relief valve 52 and the second relief valve 54 are sequentially arranged in the supply path 40 between the pressure reducer 20 and the fuel cell 30, respectively. In addition to the configuration in which the drain paths (62, 64) are separately provided between the relief valves (52, 54) and the high-pressure gas storage tank (10), the configuration is the same as the first embodiment.

As shown in FIG. 4, the fourth embodiment of the present invention restricts excessive flow of the supply pressure in the supply path 40 of the gas between the high pressure gas storage tank 10 and the pressure reducer 20. It is configured by installing the overflow prevention valve 70.

The overflow prevention valve 70 is out of the prescribed range on the supply path 40 between the high pressure gas storage tank 10 and the pressure reducer 20, for example, a leak due to a failure or breakage in the system of the gas supply device. It operates when the flow rate of fluid increases rapidly or the pressure difference exceeds the allowable standard, and it cuts off the supply of high pressure gas to prevent the gas from leaking inside the submarine's pressure hull. In this case, the overflow prevention valve 70 is installed in a position closer to the high pressure gas storage tank 10 in the supply path 40 between the high pressure gas storage tank 10 and the pressure reducer 20. desirable.

That is, the fourth embodiment of the present invention is the first embodiment other than the configuration in which the overflow prevention valve 70 is installed in the supply path 40 between the high pressure gas storage tank 10 and the pressure reducer 20. Same as the example.

As shown in FIG. 5, the fifth embodiment of the present invention is configured by installing a pressure pump or a non-return valve 80 in the drain path 60 of the relief valve 50.

The pressure pump or the non-return valve 80 returns gas to the high pressure gas storage tank 10 through the drain path 60 in an abnormal state in which the supply pressure provided to the relief valve 50 is higher than the set pressure. When the pressure of the gas through the drain path 60 is lower than the pressure inside the high pressure gas storage tank 10, the supply pressure is supplied to the high pressure gas storage tank via the pressure pump or the non-return valve 80. It is possible to pressurize higher than the internal pressure of 10) or artificially restrict the back flow to the relief valve 50 so that the return of the gas to the high pressure gas storage tank 10 can be made more smoothly.

That is, the fifth embodiment of the present invention has a configuration other than the configuration in which the pressure pump or the non-return valve 80 is installed in the drain path 60 between the relief valve 50 and the high pressure gas storage tank 10. It is made similar to the first embodiment.

As shown in FIG. 6, the drain path 60 through the relief valve 50 is a supply path between the high pressure gas storage tank 10 and the pressure reducer 20. It is constructed so that it reaches to 40).

When the drain path 60 is installed in the supply path 40 between the high pressure gas storage tank 10 and the pressure reducer 20, the high pressure gas storage tank 10 returns from the relief valve 50. There is no need to install additional lines to receive the incoming gas.

In a sixth embodiment of the present invention, in addition to the configuration in which the drain path 60 branched from the relief valve 50 is provided in the supply path 40 between the high pressure gas storage tank 10 and the pressure reducer 20. The other configuration is the same as that of the first embodiment, but the setting of the drain path 60 can be configured by applying the same to all of the first to fifth embodiments of the present invention. In particular, in the third embodiment of the present invention, the end portions of the first drain path 62 and the second drain path 64 branched from the first relief valve 52 and the second relief valve 54 are also high pressure. It may be connected in the supply path 40 between the gas storage tank 10 and the pressure reducer 20.

Therefore, according to the present invention, the pressure reducer 20 is installed on the supply path 40 between the high pressure gas storage tank 10 and the relief valve 50 with a gas which is a high pressure reactant stored in the high pressure gas storage tank 10. In the case of providing the fuel cell 30 by reducing the pressure below an appropriate pressure set through the pressure reducing device 20, the high pressure is generated through the relief valve 50 when an abnormal pressure is generated on the gas supply path 40 due to the failure of the pressure reducer 20. The reactant can be returned to the supply path 40 between the high pressure gas storage tank 10 or the high pressure gas storage tank 10 and the pressure reducer 20 via the drain path 60, so that the pressure of the submarine It is possible to fundamentally solve various problems caused by the leakage of gas inside the hull.

In particular, the present invention by installing a plurality of pressure reducer 20 or a relief valve 50 on the gas supply path 40 so that when one of the plurality of parts failure of one of the other parts to perform a normal function This makes it possible to improve the reliability in the operation of the equipment.

In addition, the present invention is not limited to the high pressure gas storage tank 10, the drain path 60 returned from the relief valve 50 at the time of the abnormal pressure in the gas supply path (40) of the high pressure gas storage tank (10) By limiting the supply path 40 between the pressure reducer and the pressure reducer 20, the problem of the return failure accompanying the pressure drop of the gas returned from the relief valve 50 to the high pressure gas storage tank 10 can be solved. In addition, since it is not necessary to provide a separate piping system for the connection with the drain path 60 on the high-pressure gas storage tank 10, it is possible to provide easy and cost-saving effects in the construction of the equipment.

As described above with reference to the accompanying drawings for the preferred embodiment of the present invention, the present invention is not limited by the above-described specific embodiments, those of ordinary skill in the art to which the present invention belongs Various modifications and variations are possible within the scope of the spirit and scope of the present invention as set forth below.

1 is a configuration diagram showing a first embodiment of a gas supply apparatus for a submarine according to the present invention.

2 is a block diagram showing a second embodiment of the present invention.

3 is a block diagram showing a third embodiment of the present invention.

Figure 4 is a block diagram showing a fourth embodiment of the present invention.

5 is a configuration diagram showing a fifth embodiment of the present invention.

6 is a block diagram showing a sixth embodiment of the present invention.

<Description of Symbols for Main Parts of Drawings>

10-high pressure gas storage tank

30-Fuel Cell 40-Supply Path

50-Relief Valve 60-Drain Path

70-overflow check valve 80-pressure pump or non-return valve

Claims (7)

In the pressure hull, a pressure reducing device 20 is installed in the supply path 40 between the high-pressure gas storage tank 10 and the fuel cell 30 to supply the gas at a proper pressure to the fuel cell 30. In the gas supply device, A drain path for blocking the gas supply path 40 provided to the fuel cell 30 when the supply pressure is excessively supplied to the rear end of the pressure reducer 30 and draining the gas provided to the fuel cell 30 ( Gas supply device for a submarine, characterized in that the relief valve 50 having a 60) is installed. The method according to claim 1, The pressure reducer 20 is sequentially disposed on the supply path 40 between the high pressure gas storage tank 10 and the fuel cell 30 to appropriately supply the supply pressure of the gas provided to the fuel cell 30. Submarine gas supply device comprising a first reducer (22) and a second reducer (24) to reduce the pressure. The method according to claim 1, The relief valve 50 is sequentially disposed on the supply path 40 between the pressure reducer 20 and the fuel cell 30 so as to drain it when the supply pressure provided to the fuel cell 30 rises excessively. A gas supply apparatus for a submarine, comprising a first relief valve (52) and a second relief valve (54). The method according to claim 1, Overflow prevention valve 70 is installed to limit the flow in the case of a rapid increase in the flow rate of the fluid on the supply path 40 between the high-pressure gas storage tank 10 and the pressure reducer 20 or a pressure difference greater than the allowable standard (70) The submarine gas supply apparatus further comprises a). The method according to any one of claims 1 to 4, The drain path 60 of the relief valve 50 is connected to the high pressure gas storage tank 10, the gas supply device of the submarine. The method according to claim 5, Submarine gas supply device further comprises a pressure pump or a non-return valve (80) installed in the drain path (60) of the relief valve (50). The method according to any one of claims 1 to 4, The drain path (60) of the relief valve (50) is a submarine gas supply device, characterized in that connected to the supply path (40) between the high pressure gas storage tank (10) and the pressure reducer (20).

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