# US 10,309,571 B2 · Pipe structure and aircraft

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- Number: US 10,309,571 B2
- Document ID: US10309571B2
- Status: Granted
- Kind: B2
- Application number: 14/979,924
- Filed: 2015-12-28
- Published: 2016-08-18
- Granted: 2019-06-04
- Earliest claimed: 2015-02-18
- Assignees: Mitsubishi Aircraft Corporation
- Applicants: Mitsubishi Aircraft Corporation
- Inventors: Hiroyuki Yamamoto; Tadahiko Suzuta; Kei Takao; Ichiro Maeda
- Web page: https://patentgrep.com/patent/US10309571B2

## CPC

- F16L 55/07: Arrangement or mounting of devices, e.g. valves, for venting or aerating or draining (apparatus for draining F16T)
- F17D 5/02: Preventing, monitoring, or locating loss
- G01M 3/002: {by using thermal means}
- F16L 2201/30: Detecting leaks
- F16L: PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- 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)
- G01M: TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR

## Abstract

The present invention provides a pipe structure including: a pipe through which a gaseous body having a higher temperature than a temperature of a surrounding atmosphere flows; a cover that covers an outer peripheral portion of the pipe, and defines a plurality of vents from which the gaseous body leaking from the pipe flows out; and a guide member that guides the gaseous body flowing out from the vent toward a line-shaped sensor that passes a position corresponding to each of the plurality of vents, and is sensitive to a temperature or a concentration of a gaseous body outside the cover.

## Claims

### Claim 1

A pipe structure comprising:
a pipe through which a gaseous body having a higher temperature than a temperature of a surrounding atmosphere flows;
a cover that covers an outer peripheral portion of the pipe, and defines a plurality of vents from which the gaseous body leaking from the pipe flows out; and
a heat-transfer member that is interposed between a line-shaped sensor that passes a position corresponding to each of the plurality of vents, and is sensitive to a temperature of a gaseous body outside the cover, and one of the plurality of vents, and transfers heat of the gaseous body flowing out from said one of the plurality of vents to the sensor, and the heat-transfer member has a smaller thickness than a diameter of said one of the plurality of vents.

### Claim 2 (depends on 1)

The pipe structure according to claim 1, further comprising a heat insulating material that is interposed between the pipe and the cover.

### Claim 3 (depends on 1)

The pipe structure according to claim 1, wherein the heat-transfer member is formed in a plate shape.

### Claim 4 (depends on 1)

An aircraft comprising the pipe structure according to claim 1.

### Claim 5 (depends on 4)

The aircraft according to claim 4, wherein the gaseous body flowing through the pipe is bleed air from an engine or an auxiliary power unit that is a power source of the aircraft.