Pressure control method for high-pressure regulator to prevent internal leak, and high-pressure shut-off valve

Abstract

Proposed are a pressure control method for a high-pressure regulator to prevent internal leak, and a high-pressure shut-off valve so as to minimize an internal leak, due to high-pressure gas remaining in a high-pressure fuel line when a valve of a gas storage tank is shut off, caused by a pressure difference between a front end portion and a rear end portion of the high-pressure regulator introducing or discharging high-pressure gas. Accordingly, the convenience for connecting work is provided, the high safety is ensured, and the high-pressure regulator is used with the high reliability.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]The instant application is a divisional application of U.S. application Ser. No. 16 / 369,907 filed on Mar. 29, 2019, which claims priority under 35 USC § 119 to Korean patent application No. 10-2018-0141114, filed Nov. 15, 2018, and Application No. 10-2019-0008748, filed Jan. 23, 2019, the entire disclosures of which are incorporated herein by reference in their entirety.BACKGROUND OF THE INVENTION1. Field of the Invention[0002]The present invention relates to a high-pressure regulator, and more particularly, to a pressure control method for a high-pressure regulator to prevent internal leak, and the high-pressure shut-off valve so as to minimize an internal leak, due to high-pressure gas remaining in a high-pressure fuel line when a valve of a gas storage tank is shut off, caused by a pressure difference between a front end portion and a rear end portion of the high-pressure regulator introducing or discharging high-pressure gas, and faci...

AI Technical Summary

Benefits of technology

[0025]To solve the above conventional problem, the present invention provides a pressure control method for a high-pressure regulator to prevent internal leak, and the high-pressure shut-off valve so as to minimize an internal leak, due to high-pressure gas remaining in a high-pressure fuel line when a valve of a gas storage tank is shut off, caused by a pressure difference between a front end portion and a rear end portion of the high-pressure regulator introducing or discharging high-pressure gas, and facilitate a direct connection between an inlet port of the high-pressure regulator and the high-pressure fuel line.

[0026]To solve the above problems, the present invention further provides high airtightness maintained at the inlet port connected to the high-pressure regulator.

[0035]According to the present invention, the internal leak, due to high-pressure gas remaining in a high-pressure fuel line when a valve of a gas storage tank is shut off, and caused by a pressure difference between a front end portion and a rear end portion of the high-pressure regulator introducing or discharging high-pressure gas is minimized, thereby enabling the vehicle to be smoothly restarted and preventing the risky condition due to the leak of the high-pressure gas, so that the high-pressure regulator can be used with high reliability and used safely and stably.

[0036]In addition, the convenience for connecting the inlet port of the high-pressure regulator to the high-pressure fuel line can be provided, and the high safety can be ensured.

[0037]In addition, the high airtightness is maintained at the inlet port connected to the high-pressure regulator, so that the higher safety can be ensured when the high-pressure fuel is supplied.

Problems solved by technology

However, related art document 2 is for removing the pressure of each line connected to the regulator, so the leakage, which is generated therein due to the pressure difference between the front end portion and the rear end portion of the regulator, cannot be prevented, in other words, the pressure inside the regulator cannot be regulated.

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