Pressure transmitter device

Patent metadata

Field	Value
Publication number	US-9939339-B2
Application number	US-201615075485-A
Country	US
Kind code	B2
Filing date	Mar 21, 2016
Priority date	Apr 10, 2015
Publication date	Apr 10, 2018
Grant date	Apr 10, 2018

Abstract

Provided is a pressure transmitter device including: a pressure receiving diaphragm in contact with a measuring fluid; a fill fluid, in contact with an opposite side of the pressure receiving diaphragm to the other side in contact with the measuring fluid, for transferring a pressure received by the pressure receiving diaphragm from the measuring fluid to a sensor disposed at a position apart from the pressure receiving diaphragm; a hydraulic path filled with the fill fluid and connecting the pressure receiving diaphragm and the sensor; and an output circuit for measuring and outputting an absolute pressure of the measuring fluid or a differential pressure between measuring fluids based on the pressure received by the sensor, where a hydrocarbon absorbing material for absorbing hydrocarbon and a hydrogen occlusion material for occluding hydrogen are provided inside the hydraulic path.

First claim

What is claimed is:

1. A pressure transmitter device comprising:
a pressure receiving diaphragm in contact with a measuring fluid;
a fill fluid which is in contact with an opposite side of the pressure receiving diaphragm to the other side in contact with the measuring fluid and is configured to transfer a pressure received by the pressure receiving diaphragm from the measuring fluid to a pressure receiving sensor disposed at a position apart from the pressure receiving diaphragm;
a hydraulic path which is filled with the fill fluid and is configured to connect the pressure receiving diaphragm and the pressure receiving sensor; and
an output circuit configured to measure and to output an absolute pressure of the measuring fluid or a differential pressure between measuring fluids based on the pressure received by the pressure receiving sensor,
wherein a hydrocarbon absorbing material for absorbing hydrocarbon and a hydrogen occlusion material for occluding hydrogen are provided inside the hydraulic path, and
wherein the hydrogen occlusion material and the hydrocarbon absorbing material are separately provided inside the hydraulic path at an interval of 5 cm or less.

2. The pressure transmitter device according to claim 1 ,
wherein hydrocarbon generated inside the hydraulic path is absorbed by the hydrocarbon absorbing material.

3. The pressure transmitter device according to claim 1 ,
wherein the hydrocarbon absorbing material includes at least one species selected from a group consisting of zeolite, activated carbon, and a porous polymer.

4. The pressure transmitter device according to claim 1 ,
wherein the hydrocarbon absorbing material has at least one type of shape selected from a group consisting of a powder form, a plate shape, a rod shape, and a film shape.

5. The pressure transmitter device according to claim 1 ,
wherein the fill fluid generates a hydrogen radical and a hydrocarbon radical by being decomposed with radiation, and
the hydrocarbon absorbing material is configured to absorb hydrocarbon resulting from the generated hydrogen radical and the hydrocarbon radical bonded with each other.

6. The pressure transmitter device according to claim 1 ,
wherein, of the pressure receiving diaphragm, at least one of a surface in contact with the measuring fluid and another surface in contact with the fill fluid is gold-plated.

7. The pressure transmitter device according to claim 1 ,
wherein the hydrogen occlusion material and the hydrocarbon absorbing material are provided inside the hydraulic path in plurality, and at least one of the hydrogen occlusion material and at least one of the hydrocarbon absorbing material are separated by at the interval of 5 cm or less.

Assignees

• Hitachi Ltd

Inventors

• Kuwana Ryo
• Shinma Daisuke
• Fushimi Atsushi
• Hanami Hideki
• Hara Isao

Classifications

• G01L19/0645

  using isolation membranes, specially adapted for protection · CPC title

• G01L7/08 Primary

  of the flexible-diaphragm type · CPC title

• G01L13/025 Primary

  using diaphragms · CPC title

• G01L13/026 Primary

  involving double diaphragm · CPC title