Structure for attaching pressure detector

Patent metadata

Field	Value
Publication number	US-10012334-B2
Application number	US-201414780404-A
Country	US
Kind code	B2
Filing date	Mar 7, 2014
Priority date	Mar 28, 2013
Publication date	Jul 3, 2018
Grant date	Jul 3, 2018

Abstract

An attachment structure for a pressure detector that is such that the pressure detector is attached in an airtight manner within an insertion hole of an attachment tool main body attached to a mechanical device or pipelines, with a pipe, a gasket presser, a gasket, a split ring, and a bonnet. The configuration is such that the gasket presser and the split ring are inserted into the insertion hole of the attachment tool main body, the bonnet is inserted into the insertion hole, the bonnet is fastened to the attachment tool main body side, the gasket presser and the gasket are pressed by the split ring, and sealing portions are formed between the bottom surface of the insertion hole and one end surface of the gasket and between the tip end surface of the gasket restraint and the other end surface of the gasket.

First claim

What is claimed is:

1. A structure for attaching a pressure detector air-tightly into an insertion hole of an attachment tool main body attached to pipelines or mechanical devices comprising:
a pressure detector having:
a casing forming a pressure introduction hole,
a pressure receiving chamber being provided in the casing and communicating with the pressure introduction hole,
a diaphragm displacing depending on the pressure of the pressure receiving chamber, and
a pressure detecting element converting a pressure caused by the displacement of the diaphragm into an electrical signal; and

the structure for attaching the pressure detector comprising:
a pipe protruding outwardly on the casing and forming the pressure introduction hole;
an annular gasket presser with a diameter larger than the pipe provided at the front end of the pipe;
an annular gasket provided on the bottom face of the insertion hole of the attachment tool main body and abutting against the front end surface of the gasket presser;
a split ring abutting against the face opposite to the front end face of the gasket presser; and
a bonnet pressing the split ring removably inserted into the insertion hole of the attachment tool main body, wherein:

the gasket presser and the split ring are inserted into the insertion hole of the attachment tool main body, the bonnet is inserted into the insertion hole and tightened on a side of the attachment tool main body, the gasket presser and the gasket are pressed by the split ring, sealing portions are formed between one end face of the gasket and the bottom face of the insertion hole and between another end face of the gasket and the front end face of the gasket presser.

2. The structure for attaching a pressure detector according to claim 1 , wherein:
the diaphragm of the pressure detector includes:
a partition diaphragm receiving pressure from the pressure introduction hole,
a pressure detecting diaphragm having the pressure detecting element, and
a pressure chamber filled with a pressure transmission medium between the partition diaphragm and the pressure detecting diaphragm.

3. The structure for attaching a pressure detector according to claim 1 , wherein:
the split ring is divided into two parts along the diameter direction; the bonnet is configured as a cylindrical bonnet having an inner diameter larger than an outer diameter of the gasket presser and smaller than an outer diameter of the split ring; and the bonnet is removably screwed into the insertion hole of the attachment tool main body.

4. A structure for attaching a pressure detector air-tightly into an insertion hole of an attachment tool main body attached to pipelines or mechanical devices comprising:
a pressure detector having:
a casing forming a pressure introduction hole,
a pressure receiving chamber provided in the casing and communicating with the pressure introduction hole,
a diaphragm displacing depending on the pressure of the pressure receiving chamber, and
a pressure detecting element converting a pressure caused by the displacement of the diaphragm into an electrical signal;

the structure for attaching the pressure detector comprising:
a pipe protruding outwardly on the casing and forming the pressure introduction hole;
an annular gasket presser with a diameter larger than the pipe provided at the front end of the pipe,
an annular gasket provided on the bottom face of the insertion hole of the attachment tool main body and abutting against the front end face of the gasket presser; and,
a U-shaped ring abutting against the face opposite to the front end face of the gasket presser and having an insertion portion that the pipe is inserted, and
a bonnet removably inserted into the insertion hole of the attachment tool main body to press the U-shaped ring, wherein:

the gasket presser and the U-shaped ring are inserted into the insertion hole of the attachment tool main body, the bonnet is inserted into the insertion hole, and tightened to a side of the attachment tool main body, the gasket presser and the gasket are pressed by the U-shaped ring; sealing portions are formed between one end face of the gasket and the bottom face of the insertion hole and between the other end face of the gasket and the front end face of the gasket presser.

5. The structure for attaching a pressure detector according to claim 4 , wherein:
the diaphragm of the pressure detector includes:
a partition diaphragm receiving pressure from the pressure introduction hole,
a pressure detecting diaphragm having the pressure detecting element, and
a pressure chamber filled with a pressure transmission medium between the partition diaphragm and the pressure detecting diaphragm.

Assignees

• Fujikin Kk
• Nidec Copal Electronics Corp

Inventors

• Dohi Ryousuke
• Nishino Kouji
• Ikeda Nobukazu
• Fukasawa masaki
• Ishiguro Katsumi

Classifications

• G01L19/145 Primary

  with stress relieving means · CPC title

• F16L41/008

  for connecting a measuring instrument · CPC title

• G01L19/147

  Details about the mounting of the sensor to support or covering means · CPC title

• F16L21/03 Primary

  placed in the socket before connection ({F16L21/022,} F16L21/025 take precedence) · CPC title

• F16L21/04

  in which sealing rings are compressed by axially-movable members · CPC title