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Opening sealing structure, sample vaporization unit, and gas chromatograph

A technology for sealing structures and sealing caps, which can be used in instruments, scientific instruments, measuring devices, etc., and can solve problems such as O-ring damage and O-ring deformation.

Pending Publication Date: 2018-08-03
SHIMADZU CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, there is a problem that the O-ring inserted to maintain the airtightness of the sample vaporization chamber is excessively deformed due to excessive tightening of the seal cap, resulting in damage to the O-ring.

Method used

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  • Opening sealing structure, sample vaporization unit, and gas chromatograph
  • Opening sealing structure, sample vaporization unit, and gas chromatograph
  • Opening sealing structure, sample vaporization unit, and gas chromatograph

Examples

Experimental program
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Effect test

Embodiment Construction

[0044] In the opening-sealing structure and the sample vaporization unit of the present invention, the stepped portion has two or more sections in which the inclination angles of the side surfaces are different from each other, and the inclination angles of the sections are preferably the following angles: In each interval, the maximum value of the force acting on the cap body fixing part in the rotation direction of the cap body fixing part is substantially the same. In this way, the operating force when turning the cap body fixing member can be made more uniform, so that the user can obtain a better operating feeling when attaching and detaching the sealing cap.

[0045] A locking portion that engages with the protrusion and stops the protrusion at that position may be provided at a position closest to the base end on the side surface of the stepped portion. In this way, it is possible to restrain the retraction of the pin rod and prevent the natural loosening of the sealing...

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PUM

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Abstract

An opening sealing structure is provided with a housing, a stepped section, a seal cap, an elastic sealing member, and a cap affixation device. The housing has a cap mounting section having a circularcylindrical shape. The stepped section is provided on the outer peripheral surface of the cap mounting section and has a side surface facing the base end side of the cap mounting section. The side surface of the stepped section is tilted in the circumferential direction of the cap mounting section, from the front end side of the cap mounting section to the base end side thereof, and the tilt angle of the side surface is smaller on the base end side of the cap mounting section than on the front end side thereof. The cap affixation device has: a cap holding section engaging with the seal cap soas to be movable in the circumferential direction of the seal cap; and an elastic section connected to the cap holding section. The elastic section is provided with a protrusion which engages with the side surface of the stepped section.

Description

technical field [0001] For example, the present invention relates to an opening sealing structure having a structure for attaching and detaching a cap at a portion having an opening such as a sample gasification unit of a gas chromatograph, a sample gasification unit having such a structure, and a sample gasification unit equipped with the sample gasification unit. The gas chromatograph of the chemical unit. Background technique [0002] Generally, a gas chromatograph is provided with a sample vaporization unit for vaporizing a sample and sending it to an analysis column. An example of a sample vaporization unit will be described. The sample vaporization unit has a casing, and inside the casing there is a space serving as a sample vaporization chamber. The sample injection port of the sample gasification chamber. The lower part of the sample vaporization chamber is connected to the analysis column, and the carrier gas is introduced from the upper part of the sample vaporiz...

Claims

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Application Information

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IPC IPC(8): G01N30/12G01N30/18
CPCG01N30/12G01N2030/126G01N30/18G01N30/6026G01N2030/025G01N2030/185
Inventor 小森优辉
Owner SHIMADZU CORP
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