Nozzle for pressure vessel and pressure vessel comprising such nozzle

Abstract

A nozzle for a pressure vessel and a pressure vessel including the same, the nozzle being connected to a liner forming the pressure vessel, the nozzle including a connection portion, the lower side of which is connected with the liner and the connection portion including an internal passage in fluid communication with the interior of the liner, and a tubular first nozzle portion, the first nozzle portion is mounted on an upper side of the connecting portion, and the first nozzle portion is detachable from the connecting portion.

Description

Citation of Related Applications

[0001] This application claims priority to Korean Patent Application No. 10-2023-0181221, filed on December 13, 2023, the entire content of which is incorporated herein by reference for all purposes. Technical Field

[0002] The present disclosure relates to a nozzle for a pressure vessel and a pressure vessel including the nozzle. Background Art

[0003] A fuel cell electric vehicle (FCEV) is a vehicle driven by supplying power to an electric motor using a fuel cell. FCEVs mainly use hydrogen as fuel. Therefore, in order to use hydrogen, hydrogen is filled in a pressure vessel.

[0004] A pressure vessel is required to have a strong structure because it must store high-pressure hydrogen. Depending on the materials used and the method of reinforcing the composite material, pressure vessels for storing high-pressure hydrogen are classified into four types, including type I, type II, type III, and type IV.

[0005] Among them, a type IV pressure vessel includes a metal nozzle, a liner made of a non-metallic material, and a composite material manufactured by winding carbon fiber or glass fiber around the liner in the circumferential direction and the longitudinal direction.

[0006] In the case of the nozzle of a type IV pressure vessel, high pressure is applied, and thus a weak part appears at the boss neck. Therefore, it is necessary to increase the structural stiffness of the boss neck to strengthen the locally vulnerable area. However, when the thickness of the boss neck is increased to meet this requirement, the operating efficiency of the vehicle decreases due to the increase in the total weight of the pressure vessel.

[0007] In addition, the method for fixing the pressure vessel is divided into a neck mounting method and a valley mounting method, and the required length of the nozzle part varies depending on the fixing method. The neck mounting method includes a fixing part and a sliding part, and even in this case, the required nozzle length is different. Therefore, it is necessary to provide various types of nozzles with different lengths.

[0008] The information included in the background of the present disclosure is only for enhancing the understanding of the general background of the present disclosure and should not be construed as an admission or any form of suggestion that the information constitutes prior art known to those skilled in the art. Summary of the Invention

[0009] Aspects of the present disclosure are directed to providing a nozzle for a pressure vessel and a pressure vessel including the nozzle, through which the total weight of the pressure vessel can be reduced.

[0010] Aspects of the present disclosure also provide a nozzle for a pressure vessel and a pressure vessel including the nozzle, wherein the length of the nozzle is adjustable.

[0011] The technical problems to be solved by the present disclosure are not limited to the above problems, and those skilled in the art to which the present disclosure pertains will clearly understand any other technical problems not mentioned herein from the following description.

[0012] According to an aspect of the present disclosure, a nozzle for a pressure vessel, the nozzle being connected to a lining forming the pressure vessel, the nozzle including: a connecting portion, the lower side of which is connected to the lining and includes an internal passage in fluid communication with the interior of the lining; and a tubular first nozzle portion, mounted on the upper side of the connecting portion and detachable from the connecting portion.

[0013] In an exemplary embodiment of the present disclosure, the nozzle may further include: a second nozzle portion extending upward from the upper end portion of the connecting portion and spaced apart from the first nozzle portion along the radial direction of the first nozzle portion, and the lengths in the up-down direction of the first nozzle portion and the second nozzle portion may correspond to each other.

[0014] In another example, the diameter of the first nozzle portion may be larger than the diameter of the second nozzle portion, and may be disposed radially outside the second nozzle portion.

[0015] In another example, the nozzle may further include a fastening portion protruding upward from the upper end portion of the connecting portion, the outer periphery of the fastening portion being located inside the outer periphery of the connecting portion, fastening threads being formed on the outer peripheral surface of the fastening portion, and wherein nozzle threads engaging with the fastening threads are formed on the lower side of the inner peripheral surface of the first nozzle portion.

[0016] In another example, the first nozzle portion may include: a coupling region including nozzle threads and formed of the same material as the materials of the second nozzle portion and the connecting portion; and a coating region surrounding the outer peripheral surface of the coupling region and formed of a material different from the material of the coupling region.

[0017] In another example, the first nozzle portion may be formed in a telescopic form such that the length in the up-down direction of the first nozzle portion is changeable.

[0018] In another example, the first nozzle portion may include: a first nozzle member extending upward and including nozzle threads on its lower side; and a second nozzle member having a diameter smaller than the diameter of the first nozzle member, disposed inside the first nozzle member and movable upward relative to the first nozzle member, a first through hole being formed on the upper side of the first nozzle member, a second through hole being formed in the second nozzle member, and when the second nozzle member is moved upward relative to the first nozzle member, the first through hole and the second through hole are in fluid communication at a predetermined position.

[0019] In another example, a plurality of second through-holes may be formed to be arranged in the vertical direction, and when the lowermost second through-hole among the plurality of second through-holes communicates with the first through-hole, the length of the first nozzle part in the vertical direction may correspond to the length of the second nozzle part in the vertical direction.

[0020] In another example, the nozzle may further include: a through member, at least a part of which is arranged between the first nozzle part and the second nozzle part and is arranged at a position corresponding to the first through-hole to pass through the first through-hole and the second through-hole; and an elastic member that elastically supports the through member toward the radially outer side of the second nozzle part.

[0021] In another example, the nozzle may further include: a third nozzle part formed between the first nozzle part and the second nozzle part, and the length of the third nozzle part in the vertical direction is less than the length of the second nozzle part in the vertical direction.

[0022] In another example, a plurality of third nozzle parts may be formed to be spaced apart from each other in the vertical direction, and at least some of the plurality of third nozzle parts may be in contact with the first nozzle part or the second nozzle part.

[0023] In another example, the first nozzle part may have the shape of a tube extending upward, and the diameter of the first nozzle part may be smaller than the diameter of the second nozzle part, and the first nozzle part may be arranged on the radially inner side of the second nozzle part.

[0024] In another example, the nozzle may further include: a fastening part protruding upward from the upper end part of the connecting part, the radially inner circumference of the fastening part being located outside the radially inner circumference of the connecting part, wherein fastening threads are formed on the inner circumferential surface of the fastening part, and nozzle threads engaging with the fastening threads are formed on the lower side of the outer circumferential surface of the first nozzle part.

[0025] In another example, the first nozzle part may include: a plurality of stacked nozzle members stacked in the vertical direction thereof.

[0026] In another example, the stacked nozzle member may include: an annular body part; a groove part recessed downward from the radially outer upper end part or the radially inner upper end part of the body part; and a protruding part protruding downward from a part of the radially outer lower end part or the radially inner lower end part of the body part where the groove part is formed, threads may be formed on the inner circumferential surface of the protruding part, and the groove part may have a shape corresponding to the shape of the protruding part.

[0027] In another example, the first nozzle part may include: a final nozzle member located above the uppermost stacked nozzle member among the plurality of stacked nozzle members, and the upper surface of the final nozzle member may be formed to be flat.

[0028] In another example, the stacked nozzle member may include an annular hollow portion inside thereof.

[0029] In another example, the nozzle part may further include a fastening part that protrudes upward from the upper end part of the connection part. The radially outer periphery of the fastening part is located inside the radially outer periphery of the connection part, and a fastening thread is included on the outer peripheral surface of the fastening part. And among the plurality of stacked nozzle members, the protruding part of the lowermost stacked nozzle member engages with the fastening part.

[0030] In another example, the first nozzle part may include a plurality of stacked nozzle members stacked in the vertical direction, and the inner peripheral surface of the stacked nozzle member may contact the outer peripheral surface of the second nozzle part.

[0031] According to an aspect of the present disclosure, a pressure vessel includes: a nozzle including a discharge channel extending upward inside thereof, and the nozzle extends upward; a lining including an internal space in fluid communication with the discharge channel and connected to the lower side of the nozzle; and a composite material surrounding the outer side of the lining, and the nozzle includes a connection part connected to the lining and includes a tubular first nozzle part formed at a distance from the connection part.

[0032] The method and apparatus of the present disclosure have other features and advantages that will be apparent from or more particularly set forth in the accompanying drawings incorporated herein and the following detailed description, which together are used to explain certain principles of the present disclosure. Description of the Drawings

[0033] Figure 1 is a partial cross-sectional view of a pressure vessel including a nozzle for a pressure vessel according to various exemplary embodiments of the present disclosure;

[0034] Figure 2 is a view exemplarily showing a separated state of a first nozzle part of a nozzle for a pressure vessel according to various exemplary embodiments of the present disclosure;

[0035] Figure 3 is a cross-sectional perspective view of a first nozzle part of a nozzle for a pressure vessel according to various exemplary embodiments of the present disclosure;

[0036] Figure 4 is a cross-sectional view of another example of a first nozzle part of a nozzle for a pressure vessel according to various exemplary embodiments of the present disclosure;

[0037] Figure 5 is a partial cross-sectional view of a pressure vessel including a nozzle for a pressure vessel according to various exemplary embodiments of the present disclosure;

[0038] Figure 6is a view exemplarily showing a state in which a first nozzle part of a nozzle for a pressure vessel according to various exemplary embodiments of the present disclosure is separated;

[0039] Figure 7 is a cross-sectional perspective view of a first nozzle part of a nozzle for a pressure vessel according to various exemplary embodiments of the present disclosure;

[0040] Figure 8 is a partial cross-sectional view of a pressure vessel including a nozzle for a pressure vessel according to various exemplary embodiments of the present disclosure;

[0041] Figure 9 is a view exemplarily showing a state in which a first nozzle part of a nozzle for a pressure vessel according to various exemplary embodiments of the present disclosure is separated;

[0042] Figure 10 is a cross-sectional perspective view of a first nozzle member and a second nozzle member of a nozzle for a pressure vessel according to various exemplary embodiments of the present disclosure;

[0043] Figure 11 is a partial cross-sectional view of a pressure vessel including a nozzle for a pressure vessel according to various exemplary embodiments of the present disclosure;

[0044] Figure 12 is a view exemplarily showing a state in which a first nozzle part of a nozzle for a pressure vessel according to various exemplary embodiments of the present disclosure is separated;

[0045] Figure 13 is a cross-sectional perspective view of a first nozzle part of a nozzle for a pressure vessel according to various exemplary embodiments of the present disclosure;

[0046] Figure 14 is a partial cross-sectional view of a pressure vessel including a nozzle for a pressure vessel according to various exemplary embodiments of the present disclosure; and

[0047] Figure 15 is a view exemplarily showing a state in which a first nozzle part of a nozzle for a pressure vessel according to various exemplary embodiments of the present disclosure is separated.

[0048] It is understood that the drawings are not necessarily drawn to scale and present a somewhat simplified representation of the various features illustrating the basic principles of the present disclosure. Certain design features of the present disclosure as included herein (including, for example, specific dimensions, orientations, positions, and shapes) will be determined in part by the particular intended application and use environment.

[0049] In the drawings, throughout several views of the drawings, the same reference numerals refer to the same or equivalent parts of the present disclosure. Detailed Embodiments

[0050] Now, various embodiments of the present disclosure will be described in detail. Examples thereof are shown in the accompanying drawings and described below. Although the present disclosure will be described in conjunction with the exemplary embodiments of the present disclosure, it should be understood that this specification is not intended to limit the present disclosure to those exemplary embodiments. On the contrary, the present disclosure is intended to cover not only the exemplary embodiments of the present disclosure, but also various alternatives, modifications, equivalents, and other embodiments that may be included within the spirit and scope of the present disclosure as defined by the appended claims.

[0051] Hereinafter, various exemplary embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. When adding reference numerals to the components of the drawings, it should be noted that even when the same component is drawn in different drawings, the same component is denoted by the same reference numeral. In addition, when determining that a detailed description of related known configurations and functions may impede the understanding of the exemplary embodiments of the present disclosure, the detailed description thereof will be omitted.

[0052] In this specification, the front / rear direction, left / right direction, up / down direction, and vertical direction are referred to for convenience of description, and they may be directions perpendicular to each other. However, these directions are determined with respect to the direction in which the nozzle is disposed, and the up / down direction may not necessarily mean the vertical direction. For example, when a pair of nozzles are disposed at two opposite ends of the lining "L", the upward direction of the nozzles may be in opposite directions.

[0053] Figure 1 is a partial cross-sectional view of a pressure vessel including a nozzle for a pressure vessel according to various exemplary embodiments of the present disclosure. Figure 2 is a view exemplarily showing a state in which a first nozzle portion of a nozzle for a pressure vessel according to various exemplary embodiments of the present disclosure is separated. Figure 3 is a cross-sectional perspective view of a first nozzle portion of a nozzle for a pressure vessel according to various exemplary embodiments of the present disclosure. Figure 4 is a cross-sectional view of another example of a first nozzle portion of a nozzle for a pressure vessel according to various exemplary embodiments of the present invention.

[0054] A nozzle 100 for a pressure vessel according to an exemplary embodiment of the present disclosure may be a nozzle for a pressure vessel. The pressure vessel may be a container for storing high-pressure gas therein.

[0055] A pressure vessel may include a nozzle 100, a lining "L", and a composite material. The nozzle 100 may include a discharge channel 101 extending upwardly inside the nozzle 100, and the nozzle may extend upward. A valve "V" may be provided in the discharge channel 101. The lining "L" may include an internal space in fluid communication with the discharge channel 101. The lining "L" may be connected to the lower side of the nozzle. The lining "L" may be configured to maintain internal airtightness. The composite material may surround the outer side of the lining "L". The composite material may be formed of winding tapes. The winding tapes may include a predetermined width and may surround the lining "L". The composite material may be configured to support the expansion force caused by high-pressure gas.

[0056] Hereinafter, various embodiments of the nozzle 100 for a pressure vessel will be described in detail. Exemplary embodiments of the present disclosure may include a technical commonality in that it includes a detachable configuration and thus defines a hollow portion in the nozzle.

[0057] The nozzle 100 for a pressure vessel according to various exemplary embodiments of the present disclosure may include a connection part 110 and a first nozzle part 120. The connection part 110 includes being connected to the lower side of the lining "L" and may include an internal channel 111 in fluid communication with the inside of the lining "L". The internal channel 111 may define a part of the discharge channel 101. The first nozzle part 120 may be formed separately from the connection part 110. The first nozzle part 120 may be disposed on the upper side of the connection part 110.

[0058] The first nozzle part 120 may be detachable. As an exemplary embodiment of the present disclosure, the first nozzle part 120 may be detachably coupled to a fastening part 150 (to be described later) by a threaded connection. However, the present disclosure is not limited thereto, and various methods such as a magnetic method or a method using an adhesive may be considered. The first nozzle part 120 may be formed in the shape of a tube.

[0059] Hereinafter, the structure of the nozzle 100 for a pressure vessel according to various exemplary embodiments of the present disclosure will be described in further detail.

[0060] The nozzle 100 for a pressure vessel according to various exemplary embodiments of the present disclosure may further include a second nozzle part 130. The second nozzle part 130 may extend upward from the upper end part of the connection part 110 and may be spaced apart from the first nozzle part 120 along the radial direction "D" of the first nozzle part 120. Here, the radial direction "D" refers to the direction of observing the periphery from the center and will not be regarded as a description limiting the shape of the first nozzle part 120 to a cylindrical shape. The second nozzle part 130 may be integrally formed with the connection part 110. The second nozzle part 130 may define the discharge channel 101 together with the internal channel 111.

[0061] The lengths of the first nozzle part 120 and the second nozzle part 130 in the vertical direction may correspond to each other. The diameter of the first nozzle part 120 is larger than the diameter of the second nozzle part 130, and the first nozzle part may be disposed radially outside the second nozzle part 130.

[0062] The nozzle 100 for a pressure vessel according to various exemplary embodiments of the present disclosure may further include a fastening part 150. The fastening part 150 may be a part protruding upward from the upper end part of the connection part 110, and the outer periphery of its diameter is located inside the outer periphery of the diameter of the connection part 110. Considering the fastening part 150, the shape of the nozzle 100 for a pressure vessel may be similar to a shape in which a part of the upper end part of the connection part 110 located radially outside is recessed downward.

[0063] A fastening thread 151 may be formed on the outer peripheral surface of the fastening part 150. A nozzle thread 121 engaged with the fastening thread 151 may be formed on the lower side of the inner peripheral surface of the first nozzle part 120.

[0064] The fastening part 150 may be integrally formed with the connection part 110. The first nozzle part 120 may be formed of a material different from the material of the connection part 110. Accordingly, the material of the first nozzle part 120 may be a composite material and a material that causes little or no galvanic corrosion. For example, the first nozzle part 120 may be one or a combination of a zinc coating, a cadmium coating, an ion deposition coating, a resin, a Teflon film, and an anodized surface treatment layer.

[0065] However, the present disclosure is not limited thereto, and as an exemplary embodiment of the present disclosure, the first nozzle part 120' may include a coupling area 120a and a coating area 120b. The coupling area 120a may be an area where the nozzle thread 121 is formed, and it is made of the same material as the materials of the second nozzle part 130 and the connection part 110. The coating area 120b may be an area that surrounds the outer peripheral surface of the coupling area 120a and is made of a material different from the material of the coupling area 120a. Accordingly, the material of the coating area 120b may be a composite material or a material that causes little or no galvanic corrosion. For example, the coating area 120b may be one or a combination of a zinc coating, a cadmium coating, an ion deposition coating, a resin, a Teflon film, and an anodized surface treatment layer.

[0066] The nozzle 100 for a pressure vessel according to various exemplary embodiments of the present disclosure may further include a third nozzle part 140. The third nozzle part 140 may be formed between the first nozzle part 120 and the second nozzle part 130.

[0067] For example, as shown in the figure, the third nozzle part 140 may protrude from the second nozzle part 130 toward the first nozzle part 120. However, the present disclosure is not limited thereto, and the third nozzle part 140 may protrude from the first nozzle part 120 toward the second nozzle part 130. In this case, the third nozzle part 140 may include a structure integral with the first nozzle part 120.

[0068] The third nozzle part 140 may be a part whose vertical length is less than the vertical length of the second nozzle part 130. A plurality of third nozzle parts 140 may be formed and may be spaced apart from each other in the vertical direction.

[0069] At least some of the plurality of third nozzle parts 140 may be in contact with the first nozzle part 120. This may mean that a hollow part is formed between the third nozzle parts 140 in the nozzle 100 for a pressure vessel. However, when the third nozzle part 140 protrudes from the first nozzle part 120 toward the second nozzle part 130, the third nozzle part 140 may be in contact with the second nozzle part 130.

[0070] Figure 5 is a partial cross-sectional view of a pressure vessel including a nozzle for a pressure vessel according to various exemplary embodiments of the present disclosure. Figure 6 is a view exemplarily showing a state in which a first nozzle part of a nozzle for a pressure vessel according to various exemplary embodiments of the present disclosure is separated. Figure 7 is a cross-sectional perspective view of a first nozzle part of a nozzle for a pressure vessel according to various exemplary embodiments of the present disclosure.

[0071] Hereinafter, reference will be made to Figure 5 、 Figure 6 and Figure 7 to describe a nozzle 100 for a pressure vessel according to various exemplary embodiments of the present disclosure. In the position of the connection part 110, the nozzle 200 for a pressure vessel according to various exemplary embodiments is different from the Figure 1 nozzle 100 for a pressure vessel according to various exemplary embodiments of the present disclosure. Components identical or equivalent to those of the nozzle 100 for a pressure vessel according to various exemplary embodiments are assigned the same or equivalent reference numerals, and detailed descriptions thereof will be omitted.

[0072] The first nozzle part 220 of the nozzle 200 for a pressure vessel according to various exemplary embodiments of the present disclosure may be formed in the shape of a tube extending upward. The diameter of the first nozzle part 220 is smaller than the diameter of the second nozzle part 230, and may be disposed radially inside the second nozzle part 230. The first nozzle part 220 may form a discharge passage 201 together with the internal passage 211.

[0073] According to various exemplary embodiments of the present disclosure, the fastening part 250 of the nozzle 200 for a pressure vessel may protrude upward from the upper end of the connection part 210, and its radially inner circumference may be located outside the radially inner circumference of the connection part 210. The fastening part 250 may include fastening threads 251 formed on its inner circumferential surface. Nozzle threads 221 engaged with the fastening threads 251 may be formed on the lower side of the outer circumferential surface of the first nozzle part 220.

[0074] The third nozzle part 240 may protrude from the second nozzle part 230 toward the first nozzle part 220. Accordingly, Figure 5 the protruding direction of the third nozzle part 240 of the nozzle 200 for a pressure vessel according to various exemplary embodiments in Figure 1 may be opposite to the protruding direction of the third nozzle part 140 of the nozzle 100 for a pressure vessel according to various exemplary embodiments of the present disclosure in

[0075] Here, the third nozzle part 240 may also protrude from the first nozzle part 220 toward the second nozzle part 230. In this case, the third nozzle part 240 may include a structure integral with the first nozzle part 220.

[0076] Figure 8 is a partial cross-sectional view of a pressure vessel including a nozzle for a pressure vessel according to various exemplary embodiments of the present disclosure. Figure 9 is a view exemplarily showing a state in which the first nozzle part of a nozzle for a pressure vessel according to various exemplary embodiments of the present disclosure is separated. Figure 10 is a cross-sectional perspective view of a first nozzle member and a second nozzle member of a nozzle for a pressure vessel according to various exemplary embodiments of the present disclosure.

[0077] Hereinafter, reference will be made to Figure 8 、 Figure 9 and Figure 10 to describe the nozzle 100 for a pressure vessel according to various exemplary embodiments of the present disclosure. The nozzle 300 for a pressure vessel according to various exemplary embodiments is different from the nozzle 100 for a pressure vessel in Figure 1 in that the nozzle includes a structure with a variable length. Components that are the same as or equivalent to the components of the nozzle 100 for a pressure vessel according to various exemplary embodiments are assigned the same or equivalent reference numerals, and their detailed descriptions will be omitted.

[0078] According to various exemplary embodiments, the first nozzle portion 320 of the nozzle 300 for a pressure vessel is formed in a telescopic form, and the length in the up-down direction thereof can be changed. As an exemplary embodiment of the present disclosure, the first nozzle portion 320 may include a first nozzle member 322 and a second nozzle member 323. The first nozzle member 322 may be a member extending upward, and include a nozzle thread 321 on its lower side. The nozzle thread 321 may engage with a fastening thread 351 formed in the fastening portion 350.

[0079] The fastening portion 350 may project upward from the upper end portion of the connecting portion 310. The radially outer periphery of the fastening portion may be located inside the radially outer periphery of the connecting portion 310, and the fastening thread 351 may be formed on the outer peripheral surface of the fastening portion.

[0080] The second nozzle member 323 may be a member having a diameter smaller than the diameter of the first nozzle member 322, and is disposed inside the first nozzle member 322. The second nozzle member 323 may move upward relative to the first nozzle member 322.

[0081] A first through hole 324 may be formed on the upper side of the first nozzle member 322. A second through hole 325 may be formed in the second nozzle member 323. When the second nozzle member 323 moves upward relative to the first nozzle member 322, the first through hole 324 and the second through hole 325 may communicate with each other at a specific position.

[0082] A plurality of second through holes 325 may be formed and arranged along its up-down direction. However, a plurality of first through holes 324 may be formed instead of a plurality of second through holes 325, and they may be arranged in its up-down direction.

[0083] When the lowermost second through hole 325 among the plurality of second through holes 325 communicates with the first through hole 324, the length of the first nozzle portion 320 in the up-down direction may correspond to the length of the second nozzle portion 330 in the up-down direction. When a plurality of first through holes 324 are formed, when the uppermost first through hole 324 among the plurality of first through holes 324 and the second through hole 325 can communicate with each other, the length of the first nozzle portion 320 in the up-down direction may correspond to the length of the second nozzle portion 330 in the up-down direction. Accordingly, the second nozzle portion 330 may form a discharge passage 301 together with the internal passage 311 of the connecting portion 310.

[0084] The third nozzle portion 340 may project from the second nozzle portion 330 toward the first nozzle portion 320. Accordingly, at least a part of the third nozzle portion 340 may contact the first nozzle portion 320.

[0085] The nozzle 100 for a pressure vessel according to various exemplary embodiments of the present disclosure may further include a through member 360 and an elastic member 370. At least a portion of the through member 360 may be disposed between the first nozzle portion 320 and the second nozzle portion 330, and may be disposed at a position corresponding to the first through hole 324 to pass through the first through hole 324 and the second through hole 325. The through member 360 may include a portion 365 having a diameter greater than a diameter of a portion that passes through the first through hole 324 and the second through hole 325 and is disposed between the first nozzle portion 320 and the second nozzle portion 330.

[0086] The elastic member 370 may elastically support the penetration member 360 radially outward with respect to the second nozzle part 330. When the first through hole 324 and the second through hole 325 communicate with each other, the elastic member 370 may move the penetration member 360 radially outward.

[0087] In the case of the nozzle 300 for a pressure vessel according to various exemplary embodiments of the present disclosure, the length of the nozzle may be changed as needed, and thus, the nozzle may be applicable to a neck installation method and a valley installation method using one nozzle.

[0088] Figure 11 is a partial cross-sectional view of a pressure vessel including a nozzle for the pressure vessel according to various exemplary embodiments of the present disclosure. Figure 12 is a view exemplarily illustrating a state in which a first nozzle part of a nozzle for a pressure vessel according to various exemplary embodiments of the present disclosure is separated. Figure 13 is a cross-sectional perspective view of a first nozzle portion of a nozzle for a pressure vessel according to various exemplary embodiments of the present disclosure.

[0089] In the following, reference will be made to Figure 11 , Figure 12 and Figure 13 A nozzle 100 for a pressure vessel according to various exemplary embodiments of the present disclosure is described. A nozzle 400 for a pressure vessel according to various exemplary embodiments is described. Figure 1 The nozzle 100 for a pressure vessel according to various exemplary embodiments is different in that the nozzle has a stacked nozzle member 421. Figure 1 The same or equivalent components of the nozzle 100 for a pressure vessel according to various exemplary embodiments are assigned the same or equivalent reference numerals, and a detailed description thereof will be omitted.

[0090] According to various exemplary embodiments of the present disclosure, the first nozzle part 420 of the nozzle 400 for a pressure vessel may include a plurality of stacked nozzle members 421. The plurality of stacked nozzle members 421 may be stacked along their vertical direction. The stacked nozzle member 421 may include a body part 422, a groove part 423, and a protrusion part 424. The body part 422 may be formed in an annular shape. The inner circumferential surface of the body part 422 and the internal passage 411 of the connection part 410 may define an emission passage 401 together.

[0091] The groove part 423 may be formed to be recessed downward from the upper end part of the radial outer side of the body part 422. The protrusion part 424 may protrude downward from the lower end part of the radial outer side of the body part 422. Threads may be formed on the inner circumferential surface of the protrusion part 424, and the groove part 423 may have a shape corresponding to the shape of the protrusion part 424.

[0092] However, the present disclosure is not limited thereto, and the groove part 423 may be formed to be recessed downward from the upper end part of the radial inner side of the body part 422. The protrusion part 424 may protrude downward from the lower end part of the radial inner side of the body part 422. Threads may be formed on the outer circumferential surface of the protrusion part 424, and the groove part 423 may have a shape corresponding to the shape of the protrusion part 424.

[0093] The first nozzle part 420 may further include a final nozzle member 425. The final nozzle member 425 may be located above the stacked nozzle member 421 located at the uppermost side among the plurality of stacked nozzle members 421. The upper surface of the final nozzle member 425 may be formed to be flat. This may mean that the shape of the final nozzle member 425 corresponds to the shape of the stacked nozzle member 421 that does not have the groove part 423.

[0094] The valve "V" may be accommodated on the upper surface of the final nozzle member 425. However, when the final nozzle member 425 is not included, a structure corresponding to the shape of the protrusion part 424 may be formed in the valve "V", and this structure may be fastened to the groove part 423 of the stacked nozzle member 421 located at the uppermost side.

[0095] An annular hollow part may be formed inside the stacked nozzle member 421. The final nozzle member 425 may also include an annular hollow part inside it.

[0096] Meanwhile, the nozzle 400 for a pressure vessel according to various exemplary embodiments of the present disclosure may further include a fastening part 450. And Figure 1Like the nozzle 100 for a pressure vessel according to various exemplary embodiments of the present disclosure, the fastening portion 450 may protrude upward from the upper end portion of the connecting portion 410, and its radial outer periphery may be located inside the radial outer periphery of the connecting portion 410, and a fastening thread 451 may be formed on its outer peripheral surface. The protrusion 424 of the stacked nozzle member 421 located at the lowermost side among the plurality of stacked nozzle members 421 may be engaged with the fastening portion 450.

[0097] Figure 14 is a partial cross-sectional view of a pressure vessel including a nozzle for the pressure vessel according to various exemplary embodiments of the present disclosure. Figure 15 is a view exemplarily illustrating a state in which a first nozzle part of a nozzle for a pressure vessel according to various exemplary embodiments of the present disclosure is separated.

[0098] In the following, reference will be made to Figure 14 and Figure 15 describe Figure 1 The nozzle 100 for a pressure vessel according to various exemplary embodiments of the present disclosure is shown in FIG. The nozzle 500 for a pressure vessel according to various exemplary embodiments is different from the nozzle 100 for a pressure vessel according to various exemplary embodiments in that the nozzle includes a second nozzle portion 530. Figure 1 The same or equivalent components of the nozzle 100 for a pressure vessel according to various exemplary embodiments are assigned the same or equivalent reference numerals, and a detailed description thereof will be omitted.

[0099] The first nozzle unit 520 of the nozzle 500 for a pressure vessel according to various exemplary embodiments of the present disclosure may include a plurality of stacked nozzle members 421 that may be stacked in an up-and-down direction thereof. The nozzle 500 for a pressure vessel according to various exemplary embodiments of the present disclosure may further include a second nozzle unit 530.

[0100] The second nozzle portion 530 may extend upward from an upper end portion of the connection portion 510, and may be spaced apart from the first nozzle portion 520 in a radial direction "D" of the first nozzle portion 520. The second nozzle portion 530 may form a discharge channel 501 together with the inner channel 511.

[0101] The length of the first nozzle part 520 in the up-down direction and the length of the second nozzle part 530 in the up-down direction may correspond to each other. The diameter of the first nozzle part 520 is larger than the diameter of the second nozzle part 530, and the first nozzle part may be disposed radially outside the second nozzle part 530. Accordingly, the inner circumferential surface of the stacked nozzle member 521 may contact the outer circumferential surface of the second nozzle part 530.

[0102] The first nozzle part 520 may include a plurality of stacked nozzle members 521. The plurality of stacked nozzle members 521 may be stacked along their vertical direction. The stacked nozzle member 521 may include a body part 522, a groove part 523, and a protrusion part 524. The body part 522 may be formed in an annular shape. The second nozzle part 530 may define a discharge passage 501 together with the internal passage 511 of the connection part 510.

[0103] The groove part 523 may be formed to be recessed downward from the upper end part of the radial outer side of the body part 522. The protrusion part 524 may protrude downward from the lower end part of the radial outer side of the body part 522. Threads may be formed on the inner circumferential surface of the protrusion part 524, and the groove part 523 may have a shape corresponding to the shape of the protrusion part 524.

[0104] The first nozzle part 520 may include a final nozzle member 525. The final nozzle member 525 may be located above the uppermost stacked nozzle member 521 among the plurality of stacked nozzle members 521. The upper surface of the final nozzle member 525 may be formed to be flat. This may mean that the shape of the final nozzle member 525 corresponds to the shape of the stacked nozzle member 521 that does not have the groove part 523.

[0105] An annular hollow part may be formed inside the stacked nozzle member 521. The final nozzle member 525 may also include an annular hollow part inside it.

[0106] Meanwhile, the nozzle 500 for a pressure vessel according to various exemplary embodiments of the present disclosure may further include a fastening part 550. As in the nozzle 100 for a pressure vessel according to various exemplary embodiments of the present disclosure, the fastening part 550 may protrude upward from the upper end part of the connection part 510, and the radial outer circumference thereof may be located inside the radial outer circumference of the connection part 510, and fastening threads 551 may be formed on its outer circumferential surface. The protrusion part 524 of the lowermost stacked nozzle member 521 among the plurality of stacked nozzle members 521 may be engaged with the fastening part 550.

[0107] In the case of the nozzle 500 for a pressure vessel according to various exemplary embodiments of the present disclosure, the second nozzle part 530 is configured as a guide for the stacked nozzle member 521 and may define a discharge passage 501 together with the internal passage 511 of the connection part 510, whereby the airtightness and firmness against hydrogen can be improved.

[0108] According to an exemplary embodiment of the present disclosure, since a part of the nozzle is formed to be detachable and a hollow part is formed inside, the weight of the nozzle can be reduced, so the weight of the pressure vessel can be reduced, and the operating efficiency of the object provided with the pressure vessel can be increased.

[0109] In addition, according to an exemplary embodiment of the present disclosure, since the length of the nozzle is adjustable, one nozzle can be applied to various positions where the length needs to be changed, thereby simplifying the process of manufacturing the nozzle.

[0110] For the sake of convenience in description and to accurately define the appended claims, reference is made to the positions of such features shown in the accompanying drawings, and the terms "upper", "lower", "inner", "outer", "above", "below", "upward", "downward", "front", "rear", "rear part", "inner side", "outer side", "inward", "outward", "internal", "external", "inner", "outer", "forward" and "backward" are used to describe the features of the exemplary embodiments. It should be further understood that the term "connected" or its derivatives refer to both direct connection and indirect connection.

[0111] The term "and / or" may include combinations of multiple related listed items or any of the multiple related listed items. For example, "A and / or B" includes all three cases, namely "A", "B", and "A and B".

[0112] In an exemplary embodiment of the present invention, "at least one of A and B" may refer to "at least one of A or B" or "at least one of the combinations of at least one of A and B". In addition, "one or more of A and B" may refer to "one or more of A or B" or "one or more of the combinations of one or more of A and B".

[0113] In this specification, unless otherwise stated, singular expressions include plural expressions, unless the context clearly indicates otherwise.

[0114] In an exemplary embodiment of the present disclosure, it should be understood that terms such as "including" or "having" are intended to specify the presence of the features, quantities, steps, operations, elements, components, or combinations thereof described in the specification, and do not exclude the possibility of adding or existing one or more other features, quantities, steps, operations, elements, components, or combinations thereof.

[0115] According to an exemplary embodiment of the present disclosure, components may be combined with each other to be implemented as one component, or some components may be omitted.

[0116] For purposes of illustration and description, the foregoing description of specific exemplary embodiments of the present disclosure has been presented. They are not intended to be exhaustive or to limit the invention to the precise forms disclosed, and obviously many modifications and variations are possible in light of the above teachings. The exemplary embodiments were chosen and described to explain the intended principles of the invention and its practical applications so that those skilled in the art can make and utilize the various exemplary embodiments of the present disclosure and their various alternatives and modifications. The scope of the invention is defined by the appended claims and their equivalents.

[0117] Description of reference numerals:

[0118] 100, 200, 300, 400, 500 Nozzle 101, 201, 301, 401, 501 Discharge channel 110, 210, 310, 410, 510 Connection portion 111, 211, 311, 411, 511 Internal channel 120, 120', 220, 320, 420, 520 First nozzle portion 120a Coupling region 120b Coating region 121, 221, 321 Nozzle thread 130, 230, 330, 530 Second nozzle portion 140, 240, 340 Third nozzle portion 150, 250, 350, 450, 550 Fastening portion 151, 251, 351, 451, 551 Fastening thread 322 First nozzle member 323 Second nozzle member 324 First through hole 325 Second through hole 360 ​​Through member 365 Part 370 Elastic member 421 , 521 Stacked nozzle member 422 , 522 Body portion 423 , 523 Recessed portion 424 , 524 Protruding portion 425 , 525 Final nozzle member D Radial direction L Liner V Valve

Claims

1. A nozzle for a pressure vessel, the nozzle being connected to a liner forming the pressure vessel, the nozzle comprising: a connecting portion having a lower side connected to the liner and including an internal passage in fluid communication with an interior of the liner; as well as A tubular first nozzle portion is mounted on an upper side of the connecting portion and is detachable from the connecting portion.

2. The nozzle according to claim 1, further comprising: a second nozzle portion extending upward from an upper end portion of the connecting portion and spaced apart from the first nozzle portion in a radial direction of the first nozzle portion, The length of the first nozzle portion in the up-down direction and the length of the second nozzle portion in the up-down direction correspond to each other.

3. The nozzle according to claim 2, wherein: The first nozzle portion has a larger diameter than the second nozzle portion, and the first nozzle portion is disposed on a radially outer side of the second nozzle portion.

4. The nozzle according to claim 3, further comprising: a fastening portion, the fastening portion protruding upward from an upper end portion of the connecting portion, the radial outer periphery of the fastening portion being located inside the radial outer periphery of the connecting portion, wherein a fastening thread is formed on an outer peripheral surface of the fastening portion; and A nozzle thread engaged with the fastening thread is formed on a lower side of an inner peripheral surface of the first nozzle portion.

5. The nozzle according to claim 4, wherein: The first nozzle portion comprises: a coupling region including the nozzle threads and formed of the same material as the second nozzle portion and the connecting portion; and The coating region surrounds the outer peripheral surface of the coupling region and is formed of a material different from that of the coupling region.

6. The nozzle according to claim 4, wherein: The first nozzle portion is formed in a telescopic form so that the length of the first nozzle portion in the up-down direction can be changed.

7. The nozzle according to claim 6, wherein: The first nozzle portion comprises: a first nozzle member extending upwardly and including the nozzle threads on an underside of the first nozzle member; and a second nozzle member, the diameter of the second nozzle member being smaller than the diameter of the first nozzle member, the second nozzle member being disposed inside the first nozzle member and being movable upward relative to the first nozzle member, wherein a first through hole is formed on an upper side of the first nozzle member, wherein a second through hole is formed in the second nozzle member, and Wherein, in a state where the second nozzle member moves upward relative to the first nozzle member, the first through hole and the second through hole communicate with each other at a predetermined position.

8. The nozzle according to claim 7, in, A plurality of second through holes are formed to be arranged in the up-down direction, and When the second through hole located at the lowermost side among the plurality of second through holes is connected to the first through hole, the length of the first nozzle in the vertical direction corresponds to the length of the second nozzle portion in the vertical direction.

9. The nozzle according to claim 7, further comprising: a through member, at least a portion of which is disposed between the first nozzle portion and the second nozzle portion and is disposed at a position corresponding to the first through hole to pass through the first through hole and the second through hole; and The elastic member elastically supports the penetration member toward the radially outer side of the second nozzle portion.

10. The nozzle according to claim 2, further comprising: The third nozzle portion is formed between the first nozzle portion and the second nozzle portion, and the length of the third nozzle portion in the vertical direction is smaller than the length of the second nozzle portion in the vertical direction.

11. The nozzle according to claim 10, in, A plurality of third nozzle portions are formed to be spaced apart from each other in the up-down direction, and At least some of the plurality of third nozzle portions are in contact with the first nozzle portion or the second nozzle portion.

12. The nozzle according to claim 2, in, The first nozzle portion has a tube shape extending upward, and The first nozzle portion has a smaller diameter than the second nozzle portion, and the first nozzle portion is disposed radially inward of the second nozzle portion.

13. The nozzle of claim 12, further comprising: a fastening portion, the fastening portion protruding upward from the upper end portion of the connecting portion, the radial inner periphery of the fastening portion being located outside the radial inner periphery of the connecting portion, wherein a fastening thread is formed on the inner peripheral surface of the fastening portion, A nozzle thread engaged with the fastening thread is formed on a lower side of an outer peripheral surface of the first nozzle portion.

14. The nozzle according to claim 1, wherein The first nozzle portion comprises: A plurality of stacked nozzle components are stacked in an up-and-down direction.

15. The nozzle according to claim 14, wherein The stacked nozzle assembly comprises: a ring-shaped main body; a groove portion recessed downward from a radially outer upper end portion or a radially inner upper end portion of the body portion; and a protrusion protruding downward from a portion of a radially outer lower end portion or a radially inner lower end portion of the main body portion where the groove portion is formed, wherein a thread is formed on the inner peripheral surface of the protrusion, and The groove portion has a shape corresponding to the shape of the protrusion portion.

16. The nozzle of claim 15, wherein: The first nozzle portion comprises: a final nozzle component located on an upper side of an uppermost stacked nozzle component among the plurality of stacked nozzle components, and Wherein, the upper surface of the final nozzle component is formed to be flat.

17. The nozzle of claim 16, wherein: The stacked nozzle member includes an annular hollow portion in its interior.

18. The nozzle of claim 15, further comprising: a fastening portion, the fastening portion protruding upward from an upper end portion of the connecting portion, the radial outer periphery of the fastening portion being located inside the radial outer periphery of the connecting portion, and including a fastening thread on an outer peripheral surface of the fastening portion, and The protrusion of the stacked nozzle component located at the lowermost side among the plurality of stacked nozzle components is engaged with the fastening portion.

19. The nozzle according to claim 2, wherein: The first nozzle portion comprises: A plurality of stacked nozzle components are stacked in an up-and-down direction, and The inner peripheral surface of the stacked nozzle member is in contact with the outer peripheral surface of the second nozzle portion.

20. A pressure vessel comprising: a nozzle including a discharge passage extending upwardly within an interior of the nozzle, and the nozzle extending upwardly; a liner including an interior space in fluid communication with the discharge passage, the liner being connected to an underside of the nozzle; as well as A composite material surrounding the outside of the liner, Wherein, the nozzle comprises: a connecting portion connected to the liner; and The first tubular nozzle portion is formed separately from the connecting portion.

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