US-12618529-B2 - Nozzle for pressure vessel and pressure vessel including the same

US12618529B2US 12618529 B2US12618529 B2US 12618529B2US-12618529-B2

Abstract

In a nozzle for a pressure vessel, and a pressure vessel including the same, the nozzle connected to a liner forming a pressure vessel includes a connecting portion, a lower side of which is connected to the liner, and including an internal passage fluidically-communicating with an interior of the liner, and a tubular first nozzle portion mounted on an upper side of the connecting portion, and being detachable from the connecting portion.

Inventors

Dong Sun Lee

Assignees

HYUNDAI MOTOR COMPANY
KIA CORPORATION

Dates

Publication Date: 20260505
Application Date: 20240521
Priority Date: 20231213

Claims (8)

1 . A nozzle connected to a liner forming a pressure vessel, the nozzle comprising: a connecting portion, a lower side of which is connected to the liner, and including an internal passage fluidically-communicating with an interior of the liner; a tubular first nozzle portion mounted on an upper side of the connecting portion, and being detachable from the connecting portion; a second nozzle portion extending upwards from an upper end portion of the connecting portion, and spaced from the first nozzle portion along a radial direction of the first nozzle portion, wherein the first nozzle portion includes a diameter being greater than a diameter of the second nozzle portion and is disposed on a radially external side of the second nozzle portion; and a fastening portion protruding upwards from the upper end portion of the connecting portion, wherein a fastening screw thread is formed on an external peripheral surface thereof; and wherein a nozzle screw thread engaged with the fastening screw thread is formed on a lower side of an internal peripheral surface of the first nozzle portion, wherein the first nozzle portion is formed in a telescopic form so that an upward and downward length of the first nozzle portion is changeable.
2 . The nozzle of claim 1 , wherein the first nozzle portion includes: a coupling area including the nozzle screw thread, and formed of same material as materials of the second nozzle portion and the connecting portion; and a coating area surrounding an external peripheral surface of the coupling area, and formed of a material being dissimilar to the material of the coupling area.
3 . The nozzle of claim 1 , wherein the first nozzle portion includes: a first nozzle member extending upward, and including the nozzle screw thread on a lower side thereof; and a second nozzle member, a diameter of which is smaller than a diameter of the first nozzle member, disposed on an inside of the first nozzle member, and being movable upward with respect 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 the first through-hole and the second through-hole communicate with each other at a predetermined location in a state that the second nozzle member is moved upward with respect to the first nozzle member.
4 . The nozzle of claim 3 , wherein a plurality of second through-holes are formed to be disposed along an upward and downward direction, and wherein the upward and downward length of the first nozzle corresponds to the upward and downward length of the second nozzle portion in a state that, among the second through-holes, the second through-hole located at a lowermost side and the first through-hole communicate with each other.
5 . The nozzle of claim 3 , further including: a through-member, at least a portion of which is disposed between the first nozzle portion and the second nozzle portion, and disposed 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 elastically supporting the through-member to a radially external side of the second nozzle portion.
6 . The nozzle of claim 1 , further including: a third nozzle portion formed between the first nozzle portion and the second nozzle portion, and an upward and downward length of which is smaller than the upward and downward length of the second nozzle portion.
7 . The nozzle of claim 6 , wherein a plurality of third nozzle portions are formed to be spaced from each other along an axial direction of the nozzle, and wherein at least some of the plurality of third nozzle portions contact with the first nozzle portion or the second nozzle portion.
8 . A pressure vessel comprising: a nozzle including a discharge passage extending upward in an interior thereof; a liner including an internal space fluidically-communicating with the discharge passage, and connected to a lower side of the nozzle; and a complex material surrounding an external side of the liner, wherein the nozzle includes: a connecting portion connected to the liner; a tubular first nozzle portion formed separately from the connecting portion; a second nozzle portion extending upwards from an upper end portion of the connecting portion, and spaced from the first nozzle portion along a radial direction of the first nozzle portion, wherein the first nozzle portion includes a diameter being greater than a diameter of the second nozzle portion and is disposed on a radially external side of the second nozzle portion, a fastening portion protruding upwards from the upper end portion of the connecting portion, wherein a fastening screw thread is formed on an external peripheral surface thereof; and wherein a nozzle screw thread engaged with the fastening screw thread is formed on a lower side of an internal peripheral surface of the first nozzle portion, wherein the first nozzle portion is formed in a telescopic form so that an upward and downward length of the first nozzle portion is changeable.

Description

CROSS-REFERENCE TO RELATED APPLICATION The present application claims priority to Korean Patent Application No. 10-2023-0181221, filed on Dec. 13, 2023, the entire contents of which is incorporated herein for all purposes by this reference. BACKGROUND OF THE PRESENT DISCLOSURE Field of the Present Disclosure The present disclosure relates to a nozzle for a pressure vessel, and a pressure vessel including the same. Description of Related Art A fuel cell electric vehicle (FCEV) refers to a vehicle which is driven by supplying electric power to an electric motor with fuel cells. The FCEV mainly utilizes hydrogen as a fuel. Therefore, to use hydrogen, hydrogen is filled in a pressure vessel. The pressure vessel requires structural robustness because it has to store high-pressure hydrogen. The pressure vessels for storing a high-pressure hydrogen gas are classified into four types, including type I, type II, type III, and type IV, depending on materials used and methods of reinforcing a complex material. Among them, a type IV pressure vessel includes a metallic nozzle, a liner formed of a non-metallic material, and a complex material manufactured by wrapping carbon fiber or glass fiber on the liner in circumferential and longitudinal directions. In the case of a nozzle of a type IV pressure vessel, a high pressure is applied, and thus a weak portion occurs in a boss neck. Accordingly, it is necessary to increase a structural rigidity of the boss neck to reinforce a local vulnerable area, but when a thickness of the boss neck is increased to satisfy this, an operating efficiency of the vehicle is reduced due to an increase in an overall weight of the pressure vessel. Furthermore, methods for fixing the pressure vessel are classified into a neck mounting method and a valley mounting method, and a length of a nozzle part required varies depending on the fixing method. The neck mounting method includes a fixed part and a sliding part, and even in the instant case, the required nozzle lengths are different. Accordingly, various types of nozzles with different lengths have to be provided. The information included in this Background of the present disclosure is only for enhancement of understanding of the general background of the present disclosure and may not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art. BRIEF SUMMARY Various aspects of the present disclosure are directed to providing a nozzle for a pressure vessel, by which an overall weight of the pressure vessel may be reduced, and a pressure vessel including the same. An aspect of the present disclosure also provides a nozzle for a pressure vessel nozzle, a length of which is adjustable, and a pressure vessel including the same. The technical problems to be solved by the present disclosure are not limited to the aforementioned problems, and any other technical problems not mentioned herein will be clearly understood from the following description by those skilled in the art to which the present disclosure pertains. According to an aspect of the present disclosure, a nozzle for a pressure vessel connected to a liner forming a pressure vessel includes a connecting portion, a lower side of which is connected to the liner, and including an internal passage fluidically-communicating with an interior of the liner, and a tubular first nozzle portion mounted on an upper side of the connecting portion, and being detachable from the connecting portion. In an exemplary embodiment of the present disclosure, the nozzle may further include a second nozzle portion extending upwards from an upper end portion of the connecting portion, and spaced from the first nozzle portion along a radial direction of the first nozzle portion, upward and downward lengths of the first nozzle portion and the second nozzle portion may correspond to each other. In another example, the first nozzle portion may have a diameter being greater than a diameter of the second nozzle portion and may be disposed on a radially external side of the second nozzle portion. In another example, the nozzle may further include a fastening portion protruding upwards from an upper end portion of the connecting portion, a radially external periphery of which is located on an inside of a radially external periphery of the connecting portion, in which a fastening screw thread is formed on an external peripheral surface thereof, and wherein a nozzle screw thread engaged with the fastening screw thread is formed on a lower side of an internal peripheral surface of the first nozzle portion. In another example, the first nozzle portion may include a coupling area including the nozzle screw thread, and is formed of same material as materials of the second nozzle portion and the connecting portion, and a coating area surrounding an external peripheral surface of the coupling area, and formed of a material being dissimilar to the