Valve assembly for fluid control

Abstract

The fluid control valve assembly of the present invention comprises a high-pressure container in which hydrogen gas is stored, a first flow path connected to a hydrogen gas filling section and a gas use section and through which hydrogen gas for filling and use passes in a single flow path, a second flow path connected between the high-pressure container and the first flow path, a third flow path connected between the high-pressure container and the first flow path, a passive valve attached to the first flow path and passively opening and closing the first flow path, a solenoid valve attached to the third flow path and opening and closing the third flow path, a fourth flow path connected between the high-pressure container and the first flow path, and a bleed valve attached to the fourth flow path and opening and closing the fourth flow path to discharge hydrogen gas inside the high-pressure container through the first flow path.

Description

【Technical Field】 【0001】 The present invention relates to a fluid control valve assembly for controlling the flow of hydrogen gas when filling a high-pressure container with hydrogen gas stored therein or supplying it to a gas usage section. 【Background Art】 【0002】 Currently, in the case of a hydrogen fuel cell system, a fluid control valve is installed in a high-pressure container storing hydrogen gas to control the flow of hydrogen gas when filling the high-pressure container with hydrogen gas and to control the flow of the source gas when supplying the hydrogen gas stored in the high-pressure container to the gas usage section. 【0003】 The fluid control valve can precisely control the flow of hydrogen gas in response to an electrical signal, must maintain the pressure of the fluid stored in the pressure vessel constant, and must prevent the explosion of the high-pressure container in the event of the overturning or fire of a hydrogen fuel cell vehicle. 【0004】 As disclosed in Korean Patent Publication No. 10-1407015 (June 5, 2014), a conventional fluid control valve assembly is composed of a bleed valve provided in a first flow path through which a source gas for filling passes, a second flow path through which a source gas for supply passes, and a seventh flow path connected to a high-pressure container. When the bleed valve operates, the source gas in the high-pressure container is immediately discharged to the outside through the seventh flow path. 【0005】 In this case, since the high-pressure gas in the high-pressure container is immediately discharged to the outside, stability is reduced. In the case of a vehicle equipped with a hydrogen fuel cell system, high-pressure source gas is discharged inside the engine room of the vehicle, increasing the risk. 【Summary of the Invention】 【Problems to be Solved by the Invention】 【0006】 Therefore, an object of the present invention is to provide a fluid control valve assembly that can improve safety by changing the flow path through which the bleed valve is installed, thereby preventing the gas discharged from the high-pressure vessel from being discharged to the outside when the bleed valve is activated, and thus preventing the high-pressure gas from being directly discharged to the outside. [Means for solving the problem] 【0007】 To achieve the above objective, the fluid control valve assembly of the present invention includes a high-pressure vessel through which hydrogen gas is stored, a filling section for filling the vessel with hydrogen gas, and a gas usage section for using the hydrogen gas, and is connected to the first flow path through which hydrogen gas for filling and use passes, a second flow path connected between the high-pressure vessel and the first flow path, through which hydrogen gas is supplied to the high-pressure vessel when filling, a third flow path connected between the high-pressure vessel and the first flow path, through which hydrogen gas stored in the high-pressure vessel is discharged when gas is used, a passive valve attached to the first flow path that passively opens and closes the first flow path, a solenoid valve attached to the third flow path that automatically opens and closes the third flow path, a fourth flow path connected between the high-pressure vessel and the first flow path, and a bleed valve attached to the fourth flow path that opens and closes the fourth flow path to discharge hydrogen gas inside the high-pressure vessel through the first flow path. 【0008】 The second and third flow paths may be connected to a first flow path behind the passive valve, and the fourth flow path may be connected to a first flow path in front of the passive valve. 【0009】 A pressure release device is installed in the fourth flow path, which allows the pressure inside the high-pressure vessel to be released to the outside when the pressure inside the high-pressure vessel rises due to temperature. 【0010】 The second flow path may be fitted with a first check valve that opens the flow of hydrogen gas supplied to the high-pressure vessel and blocks the flow in the opposite direction, and the third flow path may be fitted with a second check valve that opens the flow of hydrogen gas discharged from the high-pressure vessel and blocks the flow in the opposite direction. 【0011】 A gas outlet is installed in the flow path connected to the first flow path and supplying hydrogen gas to the gas usage section. This outlet reduces the pressure of the high-pressure hydrogen gas discharged from the high-pressure container to the gas usage pressure before discharge. When the bleed valve is operated in the opening direction, the high-pressure hydrogen gas discharged through the fourth flow path can pass through the first flow path and be discharged to the outside through the gas outlet. [Effects of the Invention] 【0012】 As described above, the fluid control valve assembly of the present invention has a fourth passage connected between the high-pressure vessel and the first passage, and a bleed valve installed in the fourth passage. When the bleed valve is activated, the high-pressure hydrogen gas in the high-pressure vessel passes through the first passage and is discharged through a gas outlet where it is reduced to the gas usage pressure. This prevents the high-pressure hydrogen gas from being directly discharged to the outside, thereby improving safety. [Brief explanation of the drawing] 【0013】 [Figure 1] This is a schematic diagram of a fluid control valve assembly according to one embodiment of the present invention. [Figure 2] This figure shows the gas flow when hydrogen gas is filled into a fluid control valve assembly according to one embodiment of the present invention. [Figure 3] This figure shows the gas flow when hydrogen gas is used in a fluid control valve assembly according to one embodiment of the present invention. [Figure 4] This figure shows the gas flow when a bleed valve is operated in a fluid control valve assembly according to one embodiment of the present invention. [Modes for carrying out the invention] 【0014】 Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. In this process, the size and shape of components shown in the drawings may be exaggerated for clarity and convenience of explanation. Furthermore, terms specifically defined in consideration of the configuration and operation of the present invention may vary depending on the intent or convention of the user or operator. Definitions of such terms should be based on the overall content of this specification. 【0015】 Figure 1 is a schematic diagram of a fluid control valve assembly according to one embodiment of the present invention. 【0016】 The fluid control valve assembly according to this embodiment includes a first flow path 10 through which hydrogen gas for filling and use passes, connected to a high-pressure vessel where hydrogen gas is stored, a filling section for filling with hydrogen gas, and a gas usage section for using hydrogen gas; a second flow path 12 connected between the high-pressure vessel 100 and the first flow path 10, through which hydrogen gas is supplied to the high-pressure vessel 100 during filling; a third flow path 14 connected between the high-pressure vessel 100 and the first flow path 10, through which hydrogen gas stored in the high-pressure vessel 100 is discharged during gas use; and a plurality of valves installed in the first flow path 10, the second flow path 12, and the third flow path 14 to control the fluid flow. 【0017】 A first filter 20 is installed in the first channel 10 to filter the hydrogen gas passing through the first channel 10 for gas filling and use, and a second filter 22 is installed in the third channel 14 to filter the hydrogen gas discharged from the high-pressure container 100. 【0018】 The second flow path 12 is equipped with a first check valve 30 that opens the gas flow supplied to the high-pressure container 100 for hydrogen gas filling and blocks the gas flow in the opposite direction, and the third flow path 14 is equipped with a second check valve 32 that opens the flow of hydrogen gas stored in the high-pressure container 100 being discharged and blocks the gas flow in the opposite direction. 【0019】 A manual valve 24 that passively opens and closes the first flow path 10 is installed in the first flow path 10, and a solenoid valve 26 that automatically opens and closes the third flow path 14 by an electrical signal is installed in the third flow path 14. 【0020】 An overcurrent cut-off valve 34 that prevents the raw material gas inside the high-pressure container 100 from flowing out abnormally and excessively when the piping of the vehicle is cut during a vehicle accident or a fall is installed in the third flow path 14. Such an overcurrent cut-off valve 34 may be arranged between the high-pressure container 100 and the solenoid valve 26. 【0021】 A temperature sensor 36 that measures the temperature inside the high-pressure container 100 is installed in the high-pressure container 100. The temperature sensor 36 is connected to a control unit 38 that applies an electrical signal to the solenoid valve 26 to control the solenoid valve 26, and applies a temperature signal to the control unit 38. 【0022】 A fourth flow path 16 is connected between the first flow path 10 and the high-pressure container 100, and a bleed valve 50 is installed in the fourth flow path 16. The bleed valve 50 opens the fourth flow path 16 and discharges the hydrogen gas inside the high-pressure container 100 to the first flow path 10 arbitrarily or when the pressure inside the high-pressure container becomes equal to or higher than the set pressure in order to relieve the pressure of the high-pressure container 100. 【0023】 And a pressure relief device 52 that discharges the pressure inside the high-pressure container to the outside is provided in the fourth flow path 16 when the pressure inside the high-pressure container 100 rises due to temperature during a vehicle accident or a vehicle fire. 【0024】 A gas discharge outlet 60 that reduces the high-pressure hydrogen gas stored in the high-pressure container 100 to the use pressure and discharges it to the outside is provided on the flow path connected to the gas usage part of the first flow path 10. 【0025】 The fourth flow path 16 is connected to the first flow path 10 that is connected in front of the manual valve 24. The hydrogen gas discharged into the fourth flow path 16 does not pass through the manual valve  24 and immediately flows into the gas discharge outlet 60 and is discharged to the outside through the gas discharge outlet 60. 【0026】 In this embodiment of the valve assembly, the fourth passage 16 is connected to the first passage 10, and a bleed valve 50 is mounted on the fourth passage 16. When the bleed valve 50 is opened, hydrogen gas in the high-pressure vessel 100 is supplied to the gas outlet 60 via the fourth passage 16 and the first passage 10, depressurized, and then discharged, thereby improving stability. 【0027】 When the valve assembly configured in this embodiment operates during filling, as shown in Figure 2, the hydrogen gas supplied through the first flow path 10 passes through the second flow path 12 as indicated by arrow A and fills the high-pressure container 100. 【0028】 At this time, the gas flow for filling is blocked from flowing into the third passage 14 by the second check valve 32, and also blocked from flowing into the fourth passage 16 by the bleed valve 50. 【0029】 As shown in Figure 3, when the gas is used, the gas flow is observed as follows: When the solenoid valve 26 is opened, the hydrogen gas stored in the high-pressure container 100 is discharged through the third flow path 14 as indicated by arrow B, passes through the first flow path 10, is depressurized to the gas usage pressure by the depressurizing device, and then supplied to the gas usage section. 【0030】 At this time, the gas flow for use is blocked from flowing into the second flow path 14 by the first check valve 30. 【0031】 Figure 4 shows the flow of hydrogen gas when the bleed valve 50 is activated. In Figure 4, when the bleed valve 50 is activated as indicated by arrow C and the fourth passage 16 is opened, the hydrogen gas stored in the high-pressure container 100 is discharged through the fourth passage 16, flows into the first passage 10 and is supplied to the gas outlet 60. Then, after being reduced to the operating pressure as it passes through the gas outlet 60, it is either discharged to the outside or flows into the gas usage section. 【0032】 At this time, the high-pressure hydrogen gas discharged through the fourth channel 16 and flowing into the first channel 10 is prevented from re-flowing into the high-pressure container 100 via the first channel 10 by closing the passive valve 24. 【0033】 Therefore, if the high-pressure hydrogen gas stored in the high-pressure vessel is immediately discharged, there is a problem of reduced stability due to the high pressure. However, in this embodiment, the valve assembly is mounted on a fourth flow path connected between the first flow path and the high-pressure vessel, and by opening the fourth flow path, it is possible to prevent the high-pressure hydrogen gas stored in the high-pressure vessel from being directly discharged to the outside. 【0034】 Although the present invention has been described in detail above with reference to specific preferred embodiments, the present invention is not limited to the above, and various modifications and alterations are possible by persons with ordinary skill in the art to which the invention pertains, without departing from the scope of the present invention. [Industrial applicability] 【0035】 This can be applied to fluid control for controlling the flow of raw material gas when filling a high-pressure vessel with hydrogen gas in a hydrogen fuel cell system, or when supplying hydrogen gas stored in a high-pressure vessel to the gas-using section. The invention as described in the claims of the original patent application is listed below. [1] A high-pressure container in which hydrogen gas is stored, A first flow path is connected to a filling section for filling with hydrogen gas and a gas usage section for using hydrogen gas, and through which hydrogen gas for filling and usage passes in a single flow path. A second channel is connected between the high-pressure vessel and the first channel, and hydrogen gas is supplied to the high-pressure vessel during filling. A third channel is connected between the high-pressure vessel and the first channel, and when the gas is used, hydrogen gas stored in the high-pressure vessel is discharged. A passive valve is installed in the first flow path and passively opens and closes the first flow path, A solenoid valve is installed in the third flow path and automatically opens and closes the third flow path, A fourth channel is connected between the high-pressure vessel and the first channel, A fluid control valve assembly comprising: a bleed valve mounted in the fourth flow path, which opens and closes the fourth flow path to discharge hydrogen gas inside a high-pressure vessel through the first flow path. [2] The fluid control valve assembly of [1] wherein the second and third flow paths are connected to a first flow path behind the passive valve, and the fourth flow path is connected to a first flow path in front of the passive valve. [3] The fluid control valve assembly [1] is equipped with a pressure release device in the fourth flow path, which releases the pressure inside the high-pressure vessel to the outside when the pressure inside the high-pressure vessel rises due to temperature. [4] A fluid control valve assembly [1] is provided, wherein the second flow path is fitted with a first check valve that opens the flow of hydrogen gas supplied to the high-pressure vessel and blocks the flow in the opposite direction, and the third flow path is fitted with a second check valve that opens the flow of hydrogen gas discharged from the high-pressure vessel and blocks the flow in the opposite direction. [5] A gas outlet is installed in the flow path connected to the first flow path and which supplies hydrogen gas to the gas usage section, for which high-pressure hydrogen gas discharged from the high-pressure container is reduced to hydrogen gas at the usage pressure before being discharged. A fluid control valve assembly [1] wherein, when the bleed valve is operated in the opening direction, high-pressure hydrogen gas discharged through a fourth passage passes through a first passage and is discharged through the gas outlet.

Claims

[Claim 1] A high-pressure container in which hydrogen gas is stored, A first flow path is connected to a filling section for filling with hydrogen gas and a gas usage section for using hydrogen gas, and through which hydrogen gas for filling and usage passes in a single flow path. A second channel is connected between the high-pressure vessel and the first channel, and hydrogen gas is supplied to the high-pressure vessel during filling. A third channel is connected between the high-pressure vessel and the first channel, and when the gas is used, hydrogen gas stored in the high-pressure vessel is discharged. A passive valve is installed in the first flow path and passively opens and closes the first flow path, A solenoid valve is installed in the third flow path and automatically opens and closes the third flow path, A fourth channel is connected between the high-pressure vessel and the first channel, The system includes a bleed valve installed in the fourth flow path, which opens and closes the fourth flow path to discharge hydrogen gas from inside the high-pressure vessel through the first flow path, A fluid control valve assembly in which the second and third flow paths are connected to a first flow path behind a passive valve, and the fourth flow path is connected to a first flow path in front of the passive valve. [Claim 2] The fluid control valve assembly according to claim 1, wherein a pressure release device is installed in the fourth flow path, and when the pressure in the high-pressure vessel rises due to temperature, the pressure inside the high-pressure vessel is released to the outside. [Claim 3] The fluid control valve assembly according to claim 1, wherein the second flow path is fitted with a first check valve that opens the flow of hydrogen gas supplied to the high-pressure vessel and blocks the flow in the opposite direction, and the third flow path is fitted with a second check valve that opens the flow of hydrogen gas discharged from the high-pressure vessel and blocks the flow in the opposite direction. [Claim 4] A gas outlet is installed in the flow path connected to the first flow path and which supplies hydrogen gas to the gas usage section, for which high-pressure hydrogen gas discharged from the high-pressure container is reduced to hydrogen gas at the usage pressure before being discharged. The fluid control valve assembly according to claim 1, wherein when the bleed valve is operated in the opening direction, the high-pressure hydrogen gas discharged through the fourth passage passes through the first passage and is discharged through the gas outlet.

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