Hydrogen storage container closure device with improved hydrogen embrittlement resistance and hydrogen storage container including the same

Abstract

The present invention relates to a closure device for sealing a hydrogen storage container that stores hydrogen, and to a closure device for a hydrogen storage container that can safely discharge permeated hydrogen to the outside of the container while satisfying hydrogen embrittlement resistance and mechanical strength standards. A closure device for a hydrogen storage container with improved hydrogen embrittlement resistance according to an embodiment of the present invention is a closure device for a hydrogen storage container that seals an open portion of the storage cylinder and supports the pressure of hydrogen filled in the storage cylinder, and includes: a cap member that seals an open portion of the storage cylinder and supports the pressure of hydrogen filled in the storage cylinder; a brittle barrier member that is installed in the cap member and comes into direct contact with hydrogen gas filled in the storage cylinder and prevents hydrogen from permeating into the cap member due to the internal pressure of the storage cylinder; and a permeated hydrogen discharge hole that penetrates the cap member and communicates with the outside so that an external pressure lower than the internal pressure of the storage cylinder acts between the brittle barrier member and the cap member, and through which hydrogen that has permeated through the brittle barrier member is discharged.

Description

[Technical Field]

[0001] The present invention relates to a closure device for sealing a hydrogen storage container that stores hydrogen, and relates to a closure device for a hydrogen storage container that can safely discharge permeated hydrogen to the outside of the container while satisfying hydrogen embrittlement resistance and mechanical strength standards. [Background technology]

[0002] Generally, hydrogen is stored in a hydrogen container, which compresses hydrogen to a high pressure so that a large amount of hydrogen can be stored.

[0003] Hydrogen containers must be highly durable because hydrogen is prone to embrittlement and is stored at high pressure due to its characteristics. One example of a hydrogen container is a "high-pressure gas container" disclosed in Korean Patent Publication No. 10-2330581 (published December 1, 2021).

[0004] The above-mentioned conventional high-pressure gas container comprises a container body, a container reinforcing wire wound around the container body in the radial direction to reinforce the rigidity of the container body, a container lid that is connected to the open side end of the container body to seal the container body and is made of a material that is corrosion-resistant to the gas filled therein, a yoke that is made of a material that is cheaper than the container lid and does not have corrosion resistance, that sits on the container lid, and has a curved surface that bulges outward from the container lid, and a lid reinforcing wire that is wound around the container body in the longitudinal direction via the yoke to prevent the container lid from being separated by the pressure of the gas filled in the container body.

[0005] Such conventional high-pressure gas cylinders can improve durability by winding a cylinder reinforcing wire around the cylinder body and a lid wire around the yoke, and hydrogen embrittlement can be prevented by forming the cylinder lid from a material that is resistant to hydrogen embrittlement.

[0006] However, conventional high-pressure gas containers have a problem in that the container lid is entirely made of a material that is resistant to hydrogen embrittlement, which not only makes the manufacturing cost high but also makes the container thick, preventing hydrogen from passing through and resulting in hydrogen retention, which causes hydrogen embrittlement. [Prior art documents] [Patent documents]

[0007] [Patent Document 1] Republic of Korea Patent Registration No. 10-2330581 (Announced December 1, 2021) Summary of the Invention [Problem to be solved by the invention]

[0008] The present invention has been devised to solve the above-mentioned problems, and the problem to be solved by the present invention is to provide a closure device for a hydrogen storage container with improved resistance to hydrogen embrittlement, and a hydrogen storage container including the same, which prevents hydrogen embrittlement in the cap member by installing a brittle barrier member in the cap member and applying external pressure through a permeation hydrogen discharge hole between the cap member and the brittle barrier member, and when hydrogen permeates the brittle barrier member, it is discharged through the permeation hydrogen discharge hole between the cap member and the brittle barrier member, thereby preventing hydrogen embrittlement in the cap member.

[0009] Another object of the present invention is to provide a closure device for a hydrogen storage container with improved resistance to hydrogen embrittlement, and a hydrogen storage container including the same, which has improved resistance to hydrogen embrittlement by installing a brittle blocking member in the cap member and by selecting from a variety of materials to manufacture the cap member, thereby reducing manufacturing costs and improving the durability of the cap member. [Means for solving the problem]

[0010] In order to achieve the above-mentioned object, an embodiment of the present invention provides a closure device for a hydrogen storage container with improved resistance to hydrogen embrittlement, which is a closure device for a hydrogen storage container that seals a storage cylinder that stores hydrogen, and includes a cap member that seals the open portion of the storage cylinder and supports the pressure of hydrogen filled in the storage cylinder, a brittle blocking member that is installed in the cap member and comes into direct contact with the hydrogen gas filled in the storage cylinder and prevents hydrogen from penetrating into the cap member due to the internal pressure of the storage cylinder, and a permeated hydrogen discharge hole that penetrates the cap member and communicates with the outside so that an external pressure that is lower than the internal pressure of the storage cylinder acts between the brittle blocking member and the cap member, and through which hydrogen that has permeated the brittle blocking member is released.

[0011] The device may include an external pressure application groove formed between the cap member and the brittle blocking member, to which an external pressure is applied through the permeated hydrogen discharge hole.

[0012] The external pressure application groove may be formed in a concave-convex shape on the cap member or the brittle blocking member.

[0013] The brittle barrier member may be made of a material resistant to hydrogen embrittlement or may be coated with a material resistant to hydrogen embrittlement, and the cap member may be made of a material not resistant to hydrogen embrittlement.

[0014] The frangible blocking member may have a thickness that is one-third or less of the thickness of the cap member.

[0015] The brittle barrier may include a barrier seal disposed on an edge of the brittle barrier to prevent hydrogen from leaking between the storage cylinder and the brittle barrier.

[0016] The cap member may include a cap member seal that provides an airtight seal between the cap member and the storage cylinder to prevent the hydrogen from escaping.

[0017] A filling nozzle may be provided to penetrate the cap member and the brittle barrier member in order to fill the interior of the storage cylinder with hydrogen.

[0018] A hydrogen storage container including a closure device for a hydrogen storage container with improved hydrogen embrittlement resistance according to an embodiment of the present invention includes a closure device according to the above-mentioned embodiment and a cylinder wire wound around the outer surface of the storage cylinder to reinforce the strength of the storage cylinder.

[0019] The storage cylinder may be open on both sides, and the closure device may be installed on each of the open sides of the storage cylinder.

[0020] The storage cylinder may include a yoke installed on the outside of each of the cap members located on both sides of the storage cylinder to prevent the cap members from coming off the storage cylinder, and a yoke wire wound around the yoke located on both sides of the storage cylinder, sandwiching the storage cylinder, to reinforce the storage cylinder to withstand pressure applied axially. [Effects of the Invention]

[0021] According to the present invention, a brittle blocking member is installed in the cap member, and external pressure is applied through the permeated hydrogen discharge hole between the cap member and the brittle blocking member. This induces hydrogen that has permeated the brittle blocking member to permeate the brittle blocking member, and the hydrogen that has permeated the brittle blocking member is discharged to the outside through the permeated hydrogen discharge hole, thereby preventing hydrogen embrittlement from occurring in the cap member.

[0022] In addition, by installing a brittle barrier member in the cap member to prevent hydrogen embrittlement, the cap member can be manufactured using a variety of materials, reducing manufacturing costs and improving the durability of the cap member. [Brief explanation of the drawings]

[0023] [Figure 1]1 is a perspective view of a hydrogen storage container including a hydrogen storage container closure device with improved hydrogen embrittlement resistance according to an embodiment of the present invention; [Figure 2] 1 is a cross-sectional side view of a hydrogen storage container including a hydrogen storage container closure device with improved resistance to hydrogen embrittlement according to an embodiment of the present invention; [Figure 3] 1 is a perspective view showing a closure device for a hydrogen storage container with improved hydrogen embrittlement resistance according to an embodiment of the present invention, showing a state in which the cap member and the brittle blocking member are separated. FIG. [Figure 4] 1 is a cross-sectional side view of a closure device for a hydrogen storage container having improved resistance to hydrogen embrittlement according to an embodiment of the present invention. [Figure 5] FIG. 5 is an enlarged view of part "A" in FIG. 4, showing the state of discharge of permeated hydrogen. [Figure 6] 1 is a side cross-sectional view of a closure device for a hydrogen storage container having improved resistance to hydrogen embrittlement according to an embodiment of the present invention, showing a cap member according to a modified example. DETAILED DESCRIPTION OF THE INVENTION

[0024] Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings.

[0025] As shown in FIGS. 3-5, a closure device 100 for a hydrogen storage container 500 with improved hydrogen embrittlement resistance according to an embodiment of the present invention may include a cap member 110 and a brittle barrier member 120.

[0026] The cap member 110 can cover the open portion of the storage cylinder 200 that stores hydrogen to seal the storage cylinder 200, and the cap member 110 can support the hydrogen pressure acting in the axial direction of the storage cylinder 200.

[0027] Here, the storage cylinder 200 has a cylindrical shape and may have a form in which either one end is open or both ends are open. In the drawing, a form in which both ends of the storage cylinder 200 are open and closure devices 100 are installed at both open ends is shown.

[0028] The cap member 110 can cover and seal the open portion of the storage cylinder 200, and one side of the cap member 110 can be provided with an insertion portion 111 that has an outer diameter corresponding to the inner diameter of the storage cylinder 200 and is inserted into the inside of the end of the storage cylinder 200.

[0029] A cap member seal 115 may be installed around the insertion portion 111 of the cap member 110 that is inserted into the storage cylinder 200, passing between the storage cylinder 200 and the cap member 110 to prevent the hydrogen filled in the storage cylinder 200 from leaking to the outside.

[0030] The cap member seal 115 has a ring shape and is installed by being inserted into a seal groove formed around the insert portion 111. The cap member seal 115 is made of metal to withstand high pressure, and the cap member seal 115 may be made of a material that is resistant to hydrogen embrittlement to prevent hydrogen embrittlement.

[0031] Here, the material having resistance to hydrogen embrittlement may be, for example, aluminum, titanium, carbon, stainless steel, austenitic or martensitic metals, or an alloy containing any one of these.

[0032] The cap member seal 115 can be realized by various known high-pressure seals so as to withstand the high pressure of hydrogen filled in the storage cylinder 200 .

[0033] The cap member 110 may have a permeated hydrogen discharge hole 113 formed therein, which is connected to the outside so that external pressure (atmospheric pressure) acts between the cap member 110 and the brittle blocking member 120 and allows hydrogen that has permeated the brittle blocking member 120 to be released to the outside.

[0034] A permeated hydrogen discharge hole 113 may be provided around the insert 111 to discharge hydrogen to the outside of the cap member 110 .

[0035] The permeated hydrogen discharge hole 113 is provided with a pressure port valve for adjusting the opening of the permeated hydrogen discharge hole 113. Since the amount of hydrogen released through the permeated hydrogen discharge hole 113 is small, it can be discharged to the outside, or a catalyst carrier filter can be installed and filtered through the catalyst carrier filter to prevent it from being released to the outside, or a separate storage container can be connected and stored in the storage container.

[0036] The position where the permeated hydrogen discharge hole 113 is formed around the insertion portion 111 is located inside the storage cylinder 200 relative to the position where the cap member seal 115 is installed, so that hydrogen that has permeated the brittle shielding member 120 can be released to the outside of the cap member 110 through the permeated hydrogen discharge hole 113 before being hermetically sealed by the cap member seal 115.

[0037] The cap member 110 is protected from hydrogen embrittlement by the brittle blocking member 120 described below, and therefore may be made of a material that is not resistant to hydrogen embrittlement.

[0038] Here, by forming the cap member 110 from a material that is not resistant to hydrogen embrittlement, the manufacturing cost can be significantly reduced.

[0039] An external pressure application groove 117 is formed on the surface of the cap member 110 to which the brittle blocking member 120 is bonded, so that external pressure can be applied between the cap member 110 and the brittle blocking member 120 to induce the release of hydrogen.

[0040] Here, since the external pressure action groove 117 is located at the boundary surface between the cap member 110 and the brittle blocking member 120, external atmospheric pressure can act on the external pressure action groove 117 through the gap at the boundary surface between the cap member 110 and the brittle blocking member 120 via the permeated hydrogen discharge hole 113.

[0041] In order to prevent hydrogen that has flowed into the external pressure action groove 117 from penetrating into the cap member 110, the inner surface of the external pressure action groove 117 may be coated with a material that is resistant to hydrogen embrittlement, or a brittleness prevention cover (not shown) may be installed that has a shape corresponding to the external pressure action groove 117, is made of a material that is resistant to hydrogen embrittlement, and is inserted into the external pressure action groove 117.

[0042] The cap member 110 has a fastening hole 119 through which a fastening member 130 such as a bolt passes to fasten the cap member 110 and fasten the cap member 110. The fastening hole 119 is connected to an external pressure action groove 117, so that external atmospheric pressure can act on the external pressure action groove 117 through the fastening hole 119.

[0043] The external pressure action groove 117 may be formed in the form of a flow path connected to the surface of the cap member 110 facing the brittle blocking member 120 or to the surface of the brittle blocking member 120 facing the cap member 110 or to both surfaces thereof, around the cap member 110 or around the opposing surfaces of the brittle blocking member 120, or may be formed in the cap member 110 as a groove of any shape at any position.

[0044] Of course, the external pressure acting groove 117 may be formed in the form of irregular or regular concaves and convexes on the surface of the cap member 110 facing the brittle blocking member 120, on the surface of the brittle blocking member 120 facing the cap member 110, or on both surfaces thereof.

[0045] As shown in FIG. 6, the modified cap member 110 may be formed so that the surface of the insertion portion 111 facing the inside of the storage cylinder 200 has a curved surface that is recessed toward the outside of the storage cylinder 200 so as to uniformly receive the pressure acting in the axial direction of the storage cylinder 200.

[0046] Here, the brittle blocking member 120, which will be described later, is also formed to have a curved surface corresponding to the concave curved surface of the cap member 110, so that the pressure acting in the axial direction of the storage cylinder 200 can be configured to act uniformly on the brittle blocking member 120.

[0047] The brittle barrier member 120 is coupled to the cap member 110, thereby preventing the cap member 110 from being subject to hydrogen embrittlement.

[0048] The frangible blocking member 120 may be inserted into the interior of the storage cylinder 200 in the cap member 110 and installed on the surface of the insert 111 that comes into contact with the hydrogen stored in the storage cylinder 200 .

[0049] The brittle blocking member 120 may also perform a pressure-proof function by separating the cap member 110 side from the inside of the storage cylinder 200 to prevent the pressure of the storage cylinder 200 from being transmitted to the cap member 110 side.

[0050] Here, atmospheric pressure acts between the cap member 110 and the brittle barrier member 120 through the permeated hydrogen discharge hole 113, and a relatively high hydrogen pressure acts inside the storage cylinder 200, so the brittle barrier member 120 can function to block the hydrogen pressure from being transmitted to the cap member 110 side.

[0051] The frangible blocking member 120 may have an inner diameter corresponding to the inner diameter of the storage cylinder 200, and the frangible blocking member 120 may be coupled to the cap member 110 by a fastener 130, such as a bolt.

[0052] The brittle barrier member 120 may be formed of a material resistant to hydrogen embrittlement, or the surface that comes into contact with hydrogen may be coated with a material resistant to hydrogen embrittlement.

[0053] The frangible blocking member 120 may have a thickness T2 that is less than or equal to one-third the thickness T1 of the cap member 110.

[0054] Here, if the thickness of the brittle barrier member 120 exceeds 1 / 3 of the thickness T1 of the cap member 110, hydrogen cannot pass through the brittle barrier member 120 and remains there, which increases the risk of hydrogen embrittlement occurring, and the volume occupied by the internal space of the storage cylinder 200 becomes large, reducing the amount of hydrogen that can be filled.

[0055] However, if the thickness T2 of the brittle blocking member 120 is formed to be 1 / 3 or less of the thickness T1 of the cap member 110, not only can the hydrogen that flows into the brittle blocking member 120 due to high pressure pass through without remaining inside the brittle blocking member 120, but also the volume that the brittle blocking member 120 occupies in the internal space of the cylinder is reduced, making it possible to store a relatively large amount of hydrogen.

[0056] The frangible shutoff member 120 may include a shutoff member seal 121 .

[0057] The blocking member seal 121 is installed around the brittle blocking member 120 to prevent hydrogen stored in the storage cylinder 200 from leaking between the brittle blocking member 120 and the storage cylinder 200.

[0058] The shutoff member seal 121 is formed in a ring shape and may be made of a material resistant to hydrogen embrittlement or may be coated with a material resistant to hydrogen embrittlement. The shutoff member seal 121 may be realized as a high-pressure seal of various known types to withstand high hydrogen pressure.

[0059] The blocking member seal 121 is installed around the surface of the brittle blocking member 120 that faces hydrogen, thereby preventing hydrogen from leaking out.

[0060] The brittle blocking member 120 is installed on top of the cap member 110 and prevents hydrogen from penetrating into the cap member 110, thereby preventing hydrogen embrittlement from occurring in the cap member 110. In addition, by forming the cap member 110 to a thickness T1 that can withstand the internal pressure acting axially from the storage cylinder 200, the thickness T1 of the cap member 110 can be minimized, thereby reducing manufacturing costs.

[0061] As shown in FIGS. 3 and 4, a closure device 100 for a hydrogen storage container 500 with improved hydrogen embrittlement resistance according to an embodiment of the present invention may include a fill nozzle 140.

[0062] The filling nozzle 140 can fill the interior of the storage cylinder 200 with hydrogen.

[0063] The filling nozzle 140 penetrates both the cap member 110 and the frangible blocking member 120, thereby supplying and filling hydrogen into the storage cylinder 200 from the outside of the cap member 110.

[0064] The filling nozzle 140 can not only fill the inside of the storage cylinder 200 with hydrogen, but also discharge the hydrogen stored in the storage cylinder 200 to the outside.

[0065] Here, if the filling nozzle 140 only functions to fill hydrogen into the storage cylinder 200, a discharge nozzle may be installed separately from the filling nozzle 140, penetrating the cap member 110 and the brittle blocking member 120 to discharge the filled hydrogen to the outside.

[0066] When closure devices 100 are installed at both ends of the storage cylinder 200, the filling nozzle 140 may be installed only on the closure device 100 located at either end, or on the closure devices 100 located on both ends, or the filling nozzle 140 may be installed on the closure device 100 located at either end and the discharge nozzle may be installed on the closure device 100 located at the other end.

[0067] The functions and effects of the above-described components will now be described.

[0068] The closure devices 100 of the hydrogen storage container 500 with improved hydrogen embrittlement resistance according to the embodiment of the present invention are installed on both open sides of the storage cylinder 200 to seal the open portions of the storage cylinder 200 .

[0069] The closure device 100 can be installed on the storage cylinder 200 such that the frangible blocking member 120 is positioned inside the storage cylinder 200 with the frangible blocking member 120 coupled to the cap member 110 that seals the end of the storage cylinder 200.

[0070] The cap member 110 and the brittle blocking member 120 are fastened to each other by a fastening member 130, and may have a gap so that external pressure can act on the cap member 110 and the brittle blocking member 120. An external pressure acting groove 117 through which external pressure acts through the gap between the brittle blocking member 120 and the cap member 110 may be formed on the surface of the cap member 110 facing the brittle blocking member 120.

[0071] The cap member 110 is provided with a permeated hydrogen discharge hole 113 penetrating therethrough so as to communicate with the outside, so that hydrogen that has permeated the brittle blocking member 120 can be discharged to the outside when external pressure acts through the periphery of the insertion portion 111 .

[0072] A cap member seal 115 is installed in the insertion portion 111 of the cap member 110 to prevent hydrogen from leaking through the gap between the storage cylinder 200 and the cap member 110 .

[0073] A blocking member seal 121 is also installed around the brittle blocking member 120 to prevent hydrogen from leaking through the gap between the storage cylinder 200 and the brittle blocking member 120 .

[0074] Meanwhile, the closure device 100 has a filling nozzle 140 for filling hydrogen into the storage cylinder 200 , which is installed through the cap member 110 and the brittle barrier member 120 .

[0075] In the closure device 100 of the hydrogen storage container 500 having improved resistance to hydrogen embrittlement according to an embodiment of the present invention, hydrogen stored at high pressure inside the storage cylinder 200 comes into contact with the brittle blocking member 120, and a blocking member seal 121 and a cap member seal 115 are installed around the brittle blocking member 120 and the cap member 110, thereby preventing the hydrogen in the storage cylinder 200 from leaking out to the outside.

[0076] The pressure of the stored hydrogen acts on the inside of the storage cylinder 200, with the brittle blocking member 120 at the center, and atmospheric pressure acts on the cap member 110 side through the permeated hydrogen discharge hole 113 and the gap between the cap member 110 and the brittle blocking member 120, and on the external pressure action groove 117.

[0077] When hydrogen penetrates into the brittle insulating member 120, the closure device 100 that seals the storage cylinder 200 in this manner induces the hydrogen that has penetrated into the brittle insulating member 120 to permeate toward the cap member 110 due to the difference between the internal pressure of the storage cylinder 200 that the brittle insulating member 120 receives and the external pressure of the cap member 110.

[0078] Here, since the brittle blocking member 120 has a thickness T2 that is relatively thinner than the thickness T1 of the cap member 110, when hydrogen permeates the brittle blocking member 120, the hydrogen can permeate without accumulating.

[0079] Then, due to the pressure difference, the hydrogen that has permeated the brittle blocking member 120 moves to the external pressure action groove 117 where atmospheric pressure acts and to the gap between the cap member 110 and the brittle blocking member 120, and is discharged to the outside through the permeated hydrogen discharge hole 113 formed around the insertion portion 111, thereby preventing hydrogen from penetrating the cap member 110 and causing hydrogen embrittlement.

[0080] Therefore, the closure device 100 of the hydrogen storage container 500 with improved hydrogen embrittlement resistance according to an embodiment of the present invention not only prevents hydrogen from penetrating the cap member 110 and causing hydrogen embrittlement in the cap member 110 by installing the brittle blocking member 120 in the cap member 110, but also prevents the hydrogen that has permeated the brittle blocking member 120 from penetrating the cap member 110 and causing hydrogen embrittlement by releasing the hydrogen that has permeated the brittle blocking member 120 to the outside through the permeated hydrogen discharge hole 113, which is exposed to atmospheric pressure on the cap member 110.

[0081] In addition, because the brittle blocking member 120 prevents hydrogen embrittlement, the cap member 110 does not need to be made of a material that is resistant to hydrogen embrittlement. This means that the cap member 110 can be manufactured using a variety of materials, thereby reducing manufacturing costs.

[0082] In addition, the volume of the cap member 110 can be minimized and manufacturing costs can be reduced because the cap member 110 can be manufactured with a minimum thickness T1 that can be reinforced to withstand the axial pressure of the storage cylinder 200. Furthermore, durability can be improved by manufacturing the cap member 110 by selecting a material that can easily satisfy mechanical strength requirements.

[0083] A hydrogen storage container 500 including a closure device 100 for a hydrogen storage container 500 with improved resistance to hydrogen embrittlement according to an embodiment of the present invention will now be described.

[0084] As shown in FIGS. 1 and 2, a hydrogen storage container 500 including a closure device 100 for a hydrogen storage container 500 according to an embodiment of the present invention may include a closure device 100.

[0085] The closure device 100 is the closure device 100 for the hydrogen storage container 500 according to the embodiment described above, so a detailed description of the closure device 100 will be omitted.

[0086] A hydrogen storage container 500 including a closure device 100 for a hydrogen storage container 500 according to an embodiment of the present invention may include a storage cylinder 200 , a yoke 300 , a cylinder wire 210 , and a yoke wire 310 .

[0087] The storage cylinder 200 is capable of storing hydrogen.

[0088] The storage cylinder 200 is formed in a hollow cylindrical shape, and both ends of the storage cylinder 200 may be open.

[0089] Both ends of the storage cylinder 200 can be sealed by closure devices 100 .

[0090] The cylinder wire 210 may be reinforced to withstand pressure acting in the radial direction of the storage cylinder 200. The cylinder wire 210 may be wound around the outer surface of the storage cylinder 200.

[0091] The cylinder wire 210 is formed in the form of a metal wire, and the cylinder wire 210 may be formed into a strip and wound around the outer surface of the storage cylinder 200 in multiple layers.

[0092] The yoke 300 can be installed on the outer surface of the cap member 110 constituting the closure device 100 to prevent the closure device 100 from being separated from the storage cylinder 200 due to the axial pressure of the storage cylinder 200 .

[0093] The yoke 300 has a semicircular shape, and the yoke 300 can be placed on the cap member 110 of the closure device 100 so that the flat end faces the cap member 110 .

[0094] The yokes 300 are respectively attached to the cap members 110 of the closure devices 100 located on both sides, and the yokes 300 can be wound with a yoke wire 310 .

[0095] The yoke wire 310 may be reinforced to withstand pressure exerted in the axial direction of the storage cylinder 200 .

[0096] The yoke wire 310 is formed in the form of a metal wire, and the yoke wire 310 may be formed in a band shape.

[0097] The yoke wire 310 is wound around the storage cylinder 200 so as to surround the yokes 300 and the storage cylinder 200 located on both sides of the storage cylinder 200, and the yoke wire 310 can be wound in multiple layers.

[0098] Meanwhile, the yokes 300 located on both sides of the storage cylinder 200 may be supported by columns 330 .

[0099] The hydrogen storage container 500 including the closure device 100 of the hydrogen storage container 500 according to the embodiment of the present invention configured in this manner has a cylinder wire 210 wound around the outer surface of the storage cylinder 200 to reinforce it to withstand radial pressure, and cap members 110 are installed on both ends of the storage cylinder 200 so that the brittle blocking member 120 of the closure device 100 is positioned inside the storage cylinder 200 and comes into contact with the stored hydrogen.

[0100] Then, with the closure device 100 installed on the storage cylinder 200 to seal the storage cylinder 200, the yokes 300 are installed on the cap members 110 located on both sides of the storage cylinder 200 so that the flat surfaces of the yokes 300 are seated on the cap members 110.

[0101] The yoke wire 310 is wound around the yoke 300 on both sides of the storage cylinder 200 and around the storage cylinder 200, thereby reinforcing the storage cylinder 200 to withstand pressure applied in the axial direction.

[0102] The hydrogen storage container 500 including the closure device 100 for a hydrogen storage container 500 according to an embodiment of the present invention configured in this manner not only has the effects of the closure device 100 for a hydrogen storage container 500 according to an embodiment of the present invention, but also has the cylinder wire 210 wound around the storage cylinder 200 to reinforce the storage cylinder 200 to withstand radial pressure, thereby improving durability and preventing explosion of the storage cylinder 200, and the yoke wire 310 reinforces the storage cylinder 200 to withstand axial pressure, improving durability.

[0103] Furthermore, by installing the closure devices 100 on both sides of the storage cylinder 200, it is possible to prevent hydrogen embrittlement from occurring in the cap member 110.

[0104] Although the embodiments of the present invention have been described above, the scope of the present invention is not limited thereto, and includes all changes and modifications that can be easily modified from the embodiments of the present invention by a person skilled in the art in the technical field to which the present invention belongs and are recognized as equivalents. [Explanation of symbols]

[0105] 100 closure device 110 Cap member 111 Insertion section 113 Permeation hydrogen discharge hole 115 Cap component seal 117 External pressure groove 119 Fastening hole 120 Brittle Breaking Member 121 Shut-off member seal 130 Fastening members 140 filling nozzle 200 storage cylinders 210 Cylinder Wire 300 York 310 Yoke Wire 330 Column 500 Hydrogen storage container

Claims

1. A closure device for a hydrogen storage container that seals a storage cylinder that stores hydrogen, comprising: a cap member that seals the open portion of the storage cylinder and supports the pressure of hydrogen filled in the storage cylinder; a brittle barrier member that is installed in the cap member and comes into direct contact with the hydrogen gas filled in the storage cylinder, and that blocks hydrogen from permeating into the cap member due to the internal pressure of the storage cylinder; A closure device for a hydrogen storage container with improved resistance to hydrogen embrittlement, characterized in that it includes a permeated hydrogen discharge hole that penetrates the cap member and communicates with the outside so that an external pressure lower than the internal pressure of the storage cylinder acts between the brittle shielding member and the cap member, and through which hydrogen that has permeated the brittle shielding member is released.

2. 2. A closure device for a hydrogen storage container with improved resistance to hydrogen embrittlement as described in claim 1, characterized in that it includes an external pressure action groove formed between the cap member and the brittle blocking member, to which external pressure acts through the permeated hydrogen discharge hole.

3. 3. The closure device for a hydrogen storage container with improved hydrogen embrittlement resistance according to claim 2, wherein the external pressure acting groove is formed in an uneven shape on the cap member or the brittle blocking member.

4. the brittle barrier member is formed of a material resistant to hydrogen embrittlement or is coated with a material resistant to hydrogen embrittlement; 2. The closure device for a hydrogen storage container with improved resistance to hydrogen embrittlement according to claim 1, wherein the cap member is made of a material that does not have resistance to hydrogen embrittlement.

5. 2. The closure device for a hydrogen storage container with improved resistance to hydrogen embrittlement according to claim 1, wherein the brittle blocking member has a thickness equal to or less than one-third of the thickness of the cap member.

6. 2. The closure device for a hydrogen storage container with improved resistance to hydrogen embrittlement as described in claim 1, characterized in that the brittle barrier member includes a barrier member seal installed on the edge of the brittle barrier member to prevent hydrogen from leaking between the storage cylinder and the brittle barrier member.

7. 2. The closure device for a hydrogen storage container with improved resistance to hydrogen embrittlement as described in claim 1, wherein the cap member includes a cap member seal that provides an airtight seal between the cap member and the storage cylinder to prevent the hydrogen from leaking out.

8. 2. The closure device for a hydrogen storage container with improved resistance to hydrogen embrittlement as claimed in claim 1, further comprising a filling nozzle installed through the cap member and the brittle barrier member to fill hydrogen into the storage cylinder.

9. The closure device of claim 1; A hydrogen storage container including a closure device for a hydrogen storage container with improved resistance to hydrogen embrittlement, characterized in that it includes a cylinder wire wound around the outer surface of the storage cylinder to reinforce the strength of the storage cylinder.

10. The storage cylinder is open on both sides, The hydrogen storage container including the closure device for a hydrogen storage container with improved hydrogen embrittlement resistance according to claim 9, wherein the closure devices are respectively installed on both open sides of the storage cylinder.

11. a yoke installed on each of the outer sides of the cap members located on both sides of the storage cylinder to prevent the cap members from being separated from the storage cylinder; 11. A hydrogen storage container including a closure device for a hydrogen storage container with improved resistance to hydrogen embrittlement as described in claim 10, characterized in that it includes a yoke wire wound around yokes located on both sides of the storage cylinder, sandwiching the storage cylinder, to reinforce the storage cylinder to withstand pressure applied axially to the storage cylinder.

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