# US 2025/0155090 A1 · Venting system and venting method

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- Number: US 2025/0155090 A1
- Document ID: US20250155090A1
- Status: Published application
- Kind: A1
- Application number: 18/840,041
- Filed: 2022-02-21
- Published: 2025-05-15
- Earliest claimed: 2022-02-21
- Assignees: Nippon Telegraph and Telephone Corporation
- Applicants: Nippon Telegraph and Telephone Corporation
- Inventors: Takuya ISHIKAWA; Koji ITASAKA; Akira ITO
- Web page: https://patentgrep.com/patent/US20250155090A1

## CPC

- F17D 5/02: Preventing, monitoring, or locating loss
- F17C 13/12: Arrangements or mounting of devices for preventing or minimising the effect of explosion (flame traps A62C4/00 ){; Other safety measures}
- F17D 5/005: {of gas pipelines, e.g. alarm}
- F17D: PIPE-LINE SYSTEMS; PIPE-LINES (pumps or compressors F04; fluid dynamics F15D; valves or the like F16K; pipes, laying pipes, supports, joints, branches, repairing, work on the entire line, accessories F16L; steam traps or the like F16T; fluid-pressure electric cables H01B9/06)
- F17C: VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES (storing fluids in natural or artificial cavities or chambers in the earth B65G5/00; construction or assembling of bulk storage containers employing civil-engineering techniques E04H7/00; variable-capacity gas-holders F17B; liquefaction or refrigeration machines, plants, or systems F25)

## Abstract

According to the present disclosure, a vent system (1) includes a supply-side inert gas tank (11) that supplies an inert gas, an inert gas transmission pipe (13) that transmits the inert gas, the inert gas transmission pipe having a gas transport pipeline disposed inside, and a recovery-side inert gas tank (12) that recovers the transmitted inert gas.

## Claims

### Claim 1

A vent system comprising:
a supply-side inert gas tank that supplies an inert gas;
an inert gas transmission pipe that transmits the inert gas, the inert gas transmission pipe having a gas transport pipeline disposed inside; and
a recovery-side inert gas tank that recovers the transmitted inert gas.

### Claim 2 (depends on 1)

The vent system according to claim 1, wherein the supply-side inert gas tank supplies the inert gas when it is determined that a gas is leaked from the gas transport pipeline.

### Claim 3 (depends on 2)

The vent system according to claim 2, further comprising:
a determination device that determines whether or not a gas is leaked from the gas transport pipeline based on an internal pressure of a supply-side gas tank that supplies a gas to the gas transport pipeline and an internal pressure of a consumption-side gas tank that receives the gas transported by the gas transport pipeline.

### Claim 4 (depends on 3)

The vent system according to claim 3, wherein the determination device determines whether or not the inert gas is leaked from the inert gas transmission pipe based on an internal pressure of the supply-side inert gas tank and an internal pressure of the recovery-side inert gas tank.

### Claim 5

A venting method performed by a vent system including a supply-side inert gas tank, an inert gas transmission pipe having a gas transport pipeline disposed inside, and a recovery-side inert gas tank, the venting method comprising:
supplying an inert gas by the supply-side inert gas tank;
transmitting the inert gas by the inert gas transmission pipe; and
recovering the transmitted inert gas by the recovery-side inert gas tank.

### Claim 6 (depends on 5)

The venting method according to claim 5, wherein the supply-side inert gas tank supplies the inert gas when it is determined that a gas is leaked from the gas transport pipeline.

### Claim 7 (depends on 6)

The venting method according to claim 6, further comprising:
determining, whether or not a gas is leaked from the gas transport pipeline, based on an internal pressure of a supply-side gas tank that supplies a gas to the gas transport pipeline and an internal pressure of a consumption-side gas tank that receives the gas transported by the gas transport pipeline.

### Claim 8 (depends on 7)

The venting method according to claim 7, further comprising:
determining, whether or not the inert gas is leaked from the inert gas transmission pipe, based on an internal pressure of the supply-side inert gas tank and an internal pressure of the recovery-side inert gas tank.

### Claim 9 (depends on 1)

The vent system according to claim 1, wherein the inert gas transmission pipe is formed by fitting together a plurality of half-pipes, wherein each of the plurality of half-pipes is facing each other in a radial direction of the gas transport pipeline.

### Claim 10 (depends on 9)

The vent system according to claim 9, wherein the plurality of half-pipes that is fitted is extending in a direction of the gas transport pipeline.

### Claim 11 (depends on 1)

The vent system according to claim 1, wherein one end of the inert gas transmission pipe is connected to a supply port of the supply-side inert gas tank and other end is connected to a duct connection port that is fixed to an underground structure.

### Claim 12 (depends on 1)

The vent system according to claim 1, wherein the vent system further comprising a controller that configures a gas leakage determination unit and an inert gas leakage determination unit.