US-12624802-B2 - Pressure vessel fixing system

US12624802B2US 12624802 B2US12624802 B2US 12624802B2US-12624802-B2

Abstract

The present invention relates to a pressure vessel fixing system, which is a neck mount for fixing a pressure vessel used for storing various fluids.

Inventors

Seok-Bong HEO
Jae-Sung Park
Kyoung-Hun Kim
Chang-Uk Lee
Ho-Sun WEE

Assignees

DUKSAN AETHERCT CO., LTD.

Dates

Publication Date: 20260512
Application Date: 20240412
Priority Date: 20231101

Claims (6)

1 . A pressure vessel fixation system comprising: a vessel having a displacement restricting part disposed on an outer circumferential surface thereof to prevent positional displacement; a neck mount having a seating groove where the displacement restricting part is placed; and pressurizing means coupled to the neck mount and configured to pressurize and fix the displacement restricting part, wherein the displacement restricting part includes a rotation restriction surface having a polygonal cross-section, wherein the neck mount includes a bottom block and a top block that are separated from each other and mutually coupled by a fastener, wherein the pressurizing means include a body with a spiral thread and a press pin disposed at a bottom of the body and configured to contact the rotation restriction surface, wherein the press pin is made of a metal having a lower strength than the body, and wherein the press pin is deformed under a compressive force generated when the body is descended and comes into contact with the rotation restriction surface.
2 . The pressure vessel fixation system according to claim 1 , wherein the pressurizing means are installed in a pair at spaced apart positions, and a distance between the pressurizing means is greater than or less than a length of one side of the rotation restriction surface.
3 . The pressure vessel fixation system according to claim 1 , wherein the polygonal cross-section is an equilateral polygon with all sides of equal length.
4 . The pressure vessel fixation system according to claim 1 , wherein the displacement restricting part includes a horizontal movement restriction groove disposed inwardly from the outer circumferential surface of the vessel.
5 . The pressure vessel fixation system according to claim 4 , wherein the seating groove further includes a protrusion jaw inserted into the horizontal movement restriction groove.
6 . The pressure vessel fixation system according to claim 1 , wherein: the bottom block is fixed to a facility; the top block is coupled to a top surface of the bottom block; and the fastener is configured to couple the bottom block and the top block, wherein the fastener includes a bolt screw coupled to coupling holes of the bottom block and the top block.

Description

BACKGROUND OF THE INVENTION Field of the Invention The present invention relates to a pressure vessel fixing system, and more specifically, to a pressure vessel fixing system which is a neck mount for fixing a pressure vessel used for storing various fluids such as oxygen, hydrogen, natural gas, and nitrogen to a facility to restrict the horizontal movement and rotation of the coupled pressure vessel, thereby preventing leakage of the stored fluid. Background Art A pressure vessel is used to store various fluids such as oxygen, hydrogen, natural gas, and nitrogen. As an example, the pressure vessel is used as a container for storing hydrogen, which is the fuel for environmentally friendly hydrogen electric vehicles. Environmentally friendly hydrogen electric vehicles are vehicles powered by electric energy generated through the electrochemical reaction between hydrogen supplied from a high-pressure hydrogen tank and oxygen in the air within a fuel cell stack. It is important to transport or store hydrogen, which is a fuel used in such environmentally friendly hydrogen electric vehicles, in a compact and safe state. For this, among various methods, there is a method of converting gaseous hydrogen into liquid hydrogen or absorbing hydrogen into absorption alloys. However, currently, hydrogen tanks storing hydrogen in a lightweight and high-pressure tank (or cylinder) are used. In this instance, to use a high-pressure hydrogen tank to an electric vehicle using a fuel cell, it is necessary to be stored in a compressed hydrogen state with high pressure of 350 bar or higher. However, if compressed hydrogen is stored below the pressure, when the high-pressure hydrogen tank is mounted in a vehicle, it can be disadvantageous in terms of practicality due to the need for securing a passenger space and securing a sufficient driving range due to the capacity of the high-pressure tank. Meanwhile, in the conventional method of mounting the high-pressure hydrogen tank, namely, the pressure vessel, to a facility such as a vehicle, a pair of brackets are respectively fixed to frames forming a vehicle body, a seating plate curved downwardly is fixed and installed between the pair of brackets, and the pressure vessel is placed on the seating plate and is fixed to the seating plate by using fixing rings and bolts. The pressure vessel fixed by the above method is significantly deformed by pressure increasing repeated pressurization and consumption of the stored hydrogen fuel, but a nozzle part of the pressure vessel is fixed only by the fixing rings and bolts. So, during vehicle operation, stress is concentrated on the nozzle part of the pressure vessel where the fixing rings and the bolts are in contact, and fine scratches are continuously generated due to the deformation of the pressure vessel and the friction caused by the deformation, thereby reducing the durability of the pressure vessel. Furthermore, the pressure vessel is rotated or moved in the horizontal direction by vibration generated during vehicle operation and shock applied by collision, thus leading to hydrogen leakage and threatening stability. PATENT LITERATURE Patent Documents Patent Document 1: Korean Patent Publication No. 10-2021-0070473 (published on Jun. 15, 2021) SUMMARY OF THE INVENTION Accordingly, the present invention has been made to solve the above-mentioned problems occurring in the prior arts, and it is an objective of the present invention to provide a pressure vessel fixing system, which when a pressure vessel is mounted on a facility, restricts the horizontal movement and rotation of the coupled pressure vessel due to vibration and shock transferred from the outside, thereby preventing leakage of stored hydrogen and enhancing stability. It is an objective of the present invention to provide a pressure vessel fixing system, which includes a pair of pressurizing means getting in contact with a nozzle part of the vessel to firmly fix the nozzle part by pressurizing and fixing the nozzle part, wherein a distance between the pair of pressurizing means corresponds to the configuration of a displacement restricting part formed on the nozzle part so that at least one of the pressurizing means gets in contact with the displacement restricting part, thereby obtaining strong fixing force. To accomplish the above object, according to the present invention, there is provided a pressure vessel fixing system including: a vessel having a displacement restricting part formed on the outer circumferential surface thereof to prevent positional displacement; a neck mount having a seating groove where the displacement restricting part is placed, and a pair of divided bodies coupled mutually; and pressurizing means coupled to the neck mount and each having a front end portion getting in contact with the displacement restricting part to pressurize and fix the displacement restricting part. Moreover, the displacement restricting part is formed on the outer circumferent