KR-102963589-B1 - Hydrogen shutoff valve with pressure distribution device

Abstract

The present invention relates to a hydrogen shut-off valve equipped with a pressure distribution device, and more specifically, the pressure distribution device is installed to distribute pressure evenly to the actuator piston when supplying pneumatic compressed air required for operation, thereby minimizing wear within the actuator cylinder and, consequently, preventing leakage of driving pressure, so that the valve is unconditionally shut off in the event of a malfunction or emergency, thereby preventing major accidents.

Inventors

• 전태현
• 나희승
• 유현석
• 이규석
• 백민혁

Assignees

• 주식회사 한국가스기술공사

Dates

Publication Date

20260511

Application Date

20231129

Claims (4)

1. A valve body (10) having an inlet (11) for hydrogen to flow into one side and an outlet (12) for hydrogen to be discharged on the other side, a transfer path (13) for hydrogen to be transported connecting the inlet (11) and the outlet (12) inside, and a connecting port (14) communicating with the internal transfer path (13) formed on the upper side; An actuator piston (30) that is inserted through the connector (14) of the valve body (10) to open and close the transfer path (13); An actuator cylinder (20) formed to surround one side of the upper portion of the actuator piston (30) and formed on the upper portion of the valve body (10), and having an input hole (27) formed on one side of the lower portion so that compressed air transferred from the outside is introduced into the interior, and which drives the actuator piston (30) up and down by the pressure of the compressed air introduced through the input hole (27); It is configured to include a pressure distribution device (40) installed inside the actuator cylinder (20) to evenly distribute and transmit pressure to the actuator piston (30). The pressure distribution device (40) is formed in the form of a plate on the bottom surface of the actuator cylinder (20), a connecting hole (41) is formed in the center so that the actuator piston (30) passes through, and a spacing projection (42) is formed protruding from the center of the bottom surface so that the pressure distribution device (40) is spaced apart from the bottom surface of the actuator cylinder (20), and compressed air injected through the input hole (27) of the actuator cylinder (20) is transported through the spaced gap. On one side of the pressure distribution device (40), a plurality of distribution holes (43) are formed so that compressed air transferred through spaced gaps is distributed and delivered to the entire lower portion of the actuator piston (30). A hydrogen shut-off valve equipped with a pressure distribution device, characterized in that an orifice (44) is installed in each of the above multiple distribution holes (43) so that compressed air is injected into each distribution hole (43) at the same pressure.
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4. In Article 1, A hydrogen shut-off valve equipped with a pressure distribution device, characterized in that the diameter of the central hole of the multiple orifices (44) is formed differently so that the pressure of compressed air is injected equally into each distribution hole (43).

Description

Hydrogen shutoff valve with pressure distribution device The present invention relates to a hydrogen shut-off valve equipped with a pressure distribution device, and more specifically, to a hydrogen shut-off valve equipped with a pressure distribution device that is installed to distribute pressure evenly to the actuator piston when supplying pneumatic compressed air required for driving, thereby minimizing wear within the actuator cylinder and, consequently, preventing leakage of driving pressure, so that the valve is unconditionally shut off in the event of a malfunction or emergency, thereby preventing major accidents. The government is presenting various policies to promote the hydrogen economy and popularize hydrogen, and one of the policies that consumers actually feel is the popularization of hydrogen cars. In 2019, the government presented the ‘Hydrogen Economy Activation Roadmap,’ with the goal of expanding the number of hydrogen cars to 2.9 million and hydrogen charging stations to 1,200 by 2040. As such, hydrogen refueling station infrastructure is crucial for the popularization of hydrogen vehicles. Hydrogen refueling stations are broadly classified into two types: the first, the 'production type (on-site) hydrogen refueling station,' which produces hydrogen directly within the station; and the second, the 'storage type (off-site) hydrogen refueling station,' which receives hydrogen from an external source, stores it in tube trailers, and supplies it. Both types of supplied hydrogen are compressed in a hydrogen compressor, which is a processing facility, and controlled to an appropriate temperature and pressure by a priority control panel, then transferred to a high-pressure container (storage facility) or dispenser, which is a compressed gas facility, and charged into a hydrogen vehicle at a pressure of about 70 MPa and a temperature of about -40℃ by a refrigeration unit and a pre-cooler. The priority control panel, which supports the organic operation of storage facilities, charging facilities, and utilities so that the supplied hydrogen can be safely charged into hydrogen vehicles, is equipped with safety valves, needle valves, shut-off valves, sensors, etc. In particular, the shut-off valve is an essential safety valve used when the hydrogen supplied to the vehicle needs to be urgently shut off due to abnormal pressure or temperature, or when hydrogen refueling has ended. However, the shut-off valve currently installed in the priority panel of hydrogen refueling stations should be installed at 90 degrees, but it is installed at 180 degrees, and the direction of supply of the pneumatic pressure required for the operation of the shut-off valve is eccentric, causing the piston to come into contact with the inside of the cylinder, resulting in damage or wear, so safety measures for hydrogen refueling stations are required. FIG. 1 is a front view showing a hydrogen shut-off valve according to one embodiment of the present invention, and FIG. 2 is a cross-sectional view showing AA of FIG. 1, and FIG. 3 is a cross-sectional view showing a valve body according to one embodiment of the present invention, and FIG. 4 is a cross-sectional view showing an actuator cylinder according to one embodiment of the present invention, and FIG. 5 is a plan view showing a pressure distribution device according to one embodiment of the present invention, and FIG. 6 is a cross-sectional view showing a pressure distribution device according to one embodiment of the present invention. The present invention having such characteristics may be explained more clearly through preferred embodiments thereof. Before describing various embodiments of the present invention in detail with reference to the attached drawings, it will be understood that the application is not limited to the details of the configuration and arrangement of components described in the following detailed description or illustrated in the drawings. The present invention may be embodied and practiced in other embodiments and may be carried out in various ways. Furthermore, it will be understood that expressions and terms used herein regarding device or element orientations (e.g., "front," "back," "up," "down," "top," "bottom," "left," "right," "lateral") are used merely to simplify the description of the present invention and do not indicate or imply that the related device or element must simply have a specific orientation. Additionally, terms such as "first" and "second" are used in this and the appended claims for illustrative purposes and are not intended to indicate or imply relative importance or intent. Therefore, the embodiments described in this specification and the configurations illustrated in the drawings are merely the most preferred embodiments of the present invention and do not represent all of the technical ideas of the present invention; thus, it should be understood that various equivalents and modifications that can replace them may e