WO2011145162A1 - 流路接続部のシール構造体 - Google Patents
流路接続部のシール構造体 Download PDFInfo
- Publication number
- WO2011145162A1 WO2011145162A1 PCT/JP2010/058279 JP2010058279W WO2011145162A1 WO 2011145162 A1 WO2011145162 A1 WO 2011145162A1 JP 2010058279 W JP2010058279 W JP 2010058279W WO 2011145162 A1 WO2011145162 A1 WO 2011145162A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- seal member
- recess
- housing
- opening
- sample
- Prior art date
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Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
- G01N30/02—Column chromatography
- G01N30/04—Preparation or injection of sample to be analysed
- G01N30/16—Injection
- G01N30/18—Injection using a septum or microsyringe
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
- G01N30/02—Column chromatography
- G01N30/04—Preparation or injection of sample to be analysed
- G01N30/16—Injection
- G01N30/18—Injection using a septum or microsyringe
- G01N2030/185—Injection using a septum or microsyringe specially adapted to seal the inlet
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
- G01N30/02—Column chromatography
- G01N30/04—Preparation or injection of sample to be analysed
- G01N30/24—Automatic injection systems
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N35/00—Automatic analysis not limited to methods or materials provided for in any single one of groups G01N1/00 - G01N33/00; Handling materials therefor
- G01N35/10—Devices for transferring samples or any liquids to, in, or from, the analysis apparatus, e.g. suction devices, injection devices
- G01N35/1079—Devices for transferring samples or any liquids to, in, or from, the analysis apparatus, e.g. suction devices, injection devices with means for piercing stoppers or septums
Definitions
- the present invention relates to a seal structure used for a connection portion of a flow path through which a liquid sample flows.
- an autosampler In analysis using a liquid chromatograph, an autosampler is used to automatically introduce a plurality of liquid samples into a column in a predetermined order.
- a sample employing a so-called total injection method in which a predetermined amount of sample is collected from a sample bottle and injected into the mobile phase channel is widely used (see Patent Document 1). .
- a predetermined amount of sample is sucked from the sample bottle by the sampling needle and filled in the sample loop (metering loop) connected to the rear end of the sampling needle.
- the tip of the sampling needle is connected to the sample injection port, and the six-way valve at the tip of the sample injection port is switched.
- the mobile phase container, the sample loop, the sampling needle, the sample injection port, the six-way valve, and the column are connected in this order.
- the sample filled in the sample loop is washed away, and the entire amount thereof is introduced into the column.
- FIG. 5 shows a schematic configuration of a conventional sample injection port 50.
- a resin seal member 51 having a through-hole 511 through which a sample passes is accommodated in a concave portion of a metal housing 52, and pressure is applied to the upper surface by a cap 53.
- the bottom surface of the seal member 51 is brought into close contact with the bottom surface of the recess of the housing 52, and the sealing performance of the connection portion between the through hole 511 of the seal member 51 and the sample introduction hole 521 of the housing 52 is maintained.
- a ring-shaped convex portion 522 may be formed around the opening of the sample introduction hole 521 on the bottom surface of the concave portion of the housing 52.
- the contact area is small, and a large pressure can be applied to the contact surface. Thereby, the sealing performance of a flow path connection part can be improved.
- This invention is made
- the place made into the objective is to provide the sealing structure which can maintain the sealing performance of a flow-path connection part even if it uses it for a long time. .
- the seal structure according to the present invention made to solve the above problems is a) a sealing member having a through-hole through which the sample passes; b) a housing having a recess for accommodating the seal member, and a sample introduction hole communicating with the through hole on the bottom surface of the recess; c) including a pressing means for pressing the seal member against the bottom surface of the recess,
- the wall surface of the recess has a shape along the outer shape of the seal member before pressing on the opening side than the predetermined depth of the recess, and has a shape wider than the opening side on the bottom surface side than the depth. It is characterized by being.
- the seal structure according to the present invention when the seal member housed in the recess of the housing is pressed toward the bottom surface of the recess by the pressing means, the bottom surface of the seal member is pressed against the bottom surface of the recess and the side surface of the seal member is outward. Try to swell. At this time, since the wall surface on the opening side from the predetermined depth of the concave portion has a shape along the outer shape of the seal member before pressing, the seal member cannot bulge outward in this portion, but the bottom surface side from the above depth. Since the recess wall surface has a shape that is wider than the opening side, the seal member in this portion can bulge outward.
- the side surface In the opening side portion of the seal member, the side surface is strongly pressed against the wall surface of the concave portion due to expansion in the side surface direction, so that a large frictional force is generated on the contact surface, and the pressing force from the opening side by the pressing means is not sufficiently transmitted to the bottom surface side. . For this reason, when pressure is initially applied, the internal stress on the opening side is larger than that on the bottom surface side inside the seal member.
- the opening side portion of the seal member having a large internal stress is gradually displaced toward the bottom side while resisting the frictional force.
- the pressure on the opening side is gradually transmitted to the bottom surface side, and the contact pressure between the seal member and the housing on the bottom surface increases.
- FIG. 3 is a cross-sectional view after assembly. The exploded sectional view of a housing. Sectional drawing of the modification of a sample injection
- the seal structure of this embodiment constitutes a sample injection port 10 of an autosampler for introducing a sample into a liquid chromatograph.
- the sample injection port 10 includes a seal member 11 having a through-hole 111 through which a liquid sample passes, a housing 12 having a recess 121 that accommodates the seal member 11, and the seal member 11 at the bottom surface of the recess 121. And a cap 15 for pressing the cap.
- the seal member 11 is a cylindrical resin part, and a through hole 111 is formed at the position of the central axis of the cylinder.
- a cylinder having a diameter of 3 mm and a length of 10 mm and a through hole 111 having a diameter of 0.5 mm is used as an example of the seal member 11.
- the resin it is preferable to use a resin having chemical resistance (for example, PEEK (polyether ether ketone), PPS (polyphenylene sulfide), polyimide, etc.) so as not to affect the liquid sample passing through the through-hole 111. .
- the tip of the sampling needle is in close contact with the opening at the upper end of the through hole 111.
- the housing 12 includes a cylindrical metal inner housing 13 and a metal outer housing 14 having an accommodating portion 141 for accommodating the inner housing 13.
- the inner housing 13 has an insertion hole 131 into which the seal member 11 is inserted.
- the wall surface of the insertion hole 131 has the same diameter as the outer diameter of the seal member 11 from the upper end to a predetermined depth (for example, a depth of 7 mm when the length of the inner housing 13 is 10 mm).
- a predetermined depth for example, a depth of 7 mm when the length of the inner housing 13 is 10 mm.
- the inclination part 132 extended on the lower end side.
- the opening diameter on the lower end side of the inclined portion 132 that is, the opening diameter of the widest portion is ⁇ 3.2 mm.
- a sample introduction hole 142 having the same diameter as the through hole 111 of the seal member 11 is formed in the center of the bottom surface of the accommodating portion 141.
- the bottom surface of the accommodating portion 141 may be flat as shown in FIG. 3, or a ring-shaped convex portion 143 may be formed around the opening of the sample introduction hole 142 on the bottom surface as shown in FIG. Thereby, the sealing performance of the flow path connecting portion can be further improved.
- the convex part 143 of a present Example is a ring-shaped thing of outer diameter 2mm and height 0.5mm.
- the housing 12 is made of a corrosion-resistant metal (for example, stainless steel or titanium).
- the cap 15 is a substantially disk-shaped metal part, and a cylindrical pressing portion 151 having the same outer diameter as the seal member 11 protrudes from the center of the surface on the seal member 11 side.
- the inner diameter of the pressing portion 151 is larger than the outer diameter of the sampling needle.
- a female thread portion 153 projects from the surface of the peripheral portion of the cap 15 on the seal member 11 side (housing 12 side).
- the female screw portion 153 meshes with a male screw portion 144 (see FIG. 2) provided around the opening of the accommodating portion 141 in the outer housing 14.
- the inner housing 13 When assembling the sample injection port 10, first, the inner housing 13 is inserted into the accommodating portion 141 of the outer housing 14, and the bottom surface of the inner housing 13 is brought into contact with the bottom surface of the accommodating portion 141. As a result, a wall 121 of the insertion hole 131 of the inner housing 13 and a recess 121 surrounded by the bottom surface of the accommodating portion 141 of the outer housing 14 are formed (see FIG. 1A). Next, the seal member 11 is inserted into the concave portion 121, and the bottom surface of the seal member 11 is brought into contact with the convex portion 143 on the bottom surface of the concave portion 121 (see FIG. 1B).
- the cap 15 is strongly tightened from above the seal member 11, and pressure is applied to the upper surface of the seal member 11 by the pressing portion 151 of the cap 15.
- the bottom surface of the seal member 11 is pressed against the bottom surface of the recess 121 and deformed, and the bottom surface side edge of the seal member 11 spreads into a ring-shaped space formed by the inclined portion 132 (see FIG. 1C).
- the upper surface side portion of the seal member 11 expands in the side surface direction by the above pressing, and the side surface is strongly pressed against the wall surface of the recess 121. For this reason, a large frictional force is generated on the contact surface, and the pressing force from the upper surface side by the pressing portion 151 is not sufficiently transmitted to the bottom surface side. Therefore, at the beginning when the pressure is applied, the internal stress on the upper surface side is larger than that on the bottom surface side inside the seal member.
- the upper surface side portion of the seal member 11 having a large internal stress is gradually displaced toward the bottom surface side against the frictional force.
- the pressure on the upper surface side is gradually transmitted to the bottom surface side, and the contact pressure between the seal member 11 and the housing 12 on the bottom surface increases.
- a stepped portion 133 may be provided on the entire lower end of the insertion hole 131 as shown in FIG. 4.
- the housing 12 may be made of a resin having a higher elastic modulus than the resin constituting the seal member 11.
- the resin having a high elastic modulus is not limited to a different type of resin from the seal member 11, and may be a composite material in which the elastic modulus is improved by mixing carbon fiber or the like into the same resin as the seal member 11.
- the shape of the seal member 11 is not limited to a cylindrical shape, and may be an elliptical column or a rectangular column.
- the seal structure of the present invention is suitable for sealing a connection portion of a flow path through which a liquid sample to which a high pressure is applied flows, and can also be applied to a flow path connection portion other than the sample injection port. Moreover, the present invention can be applied not only to the flow path connection portion of the liquid chromatograph autosampler but also to the flow path connection portion of other analyzers.
Abstract
Description
a)試料が通過する貫通孔を有するシール部材と、
b)前記シール部材を収容する凹部を有し、該凹部の底面に前記貫通孔に連通する試料導入孔が設けられたハウジングと、
c)前記シール部材を前記凹部の底面に押し付けるための押圧手段と
を備えるとともに、
前記凹部の壁面が、該凹部の所定深さよりも開口側では押圧前の前記シール部材の外形に沿った形状を有し、該深さよりも底面側では開口側よりも広がった形状を有するものであることを特徴とする。
11、51…シール部材
111、511…貫通孔
12、52…ハウジング
121…凹部
13…内側ハウジング
131…挿入孔
132…傾斜部
133…段差部
14…外側ハウジング
141…収容部
142、521…試料導入孔
143、522…凸部
144…雄ねじ部
15、53…キャップ
151…押圧部
153…雌ねじ部
Claims (3)
- a)試料が通過する貫通孔を有するシール部材と、
b)前記シール部材を収容する凹部を有し、該凹部の底面に前記貫通孔に連通する試料導入孔が設けられたハウジングと、
c)前記シール部材を前記凹部の底面に押し付けるための押圧手段と
を備えるとともに、
前記凹部の壁面が、該凹部の所定深さよりも開口側では押圧前の前記シール部材の外形に沿った形状を有し、該深さよりも底面側では開口側よりも広がった形状を有するものであることを特徴とするシール構造体。 - 前記凹部の壁面における前記所定深さよりも底面側が、該底面側に広がる傾斜面であることを特徴とする請求項1に記載のシール構造体。
- 前記シール部材が樹脂からなるものであり、前記ハウジングが該シール部材を構成する樹脂よりも高い弾性率を有する樹脂からなるものであることを特徴とする請求項1又は2に記載のシール構造体。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201080066812.6A CN102893065B (zh) | 2010-05-17 | 2010-05-17 | 流路连接部的密封结构体 |
JP2012515652A JP5273302B2 (ja) | 2010-05-17 | 2010-05-17 | 流路接続部のシール構造体 |
PCT/JP2010/058279 WO2011145162A1 (ja) | 2010-05-17 | 2010-05-17 | 流路接続部のシール構造体 |
US13/698,264 US9103810B2 (en) | 2010-05-17 | 2010-05-17 | Sealing structure for liquid passage connection part |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/JP2010/058279 WO2011145162A1 (ja) | 2010-05-17 | 2010-05-17 | 流路接続部のシール構造体 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2011145162A1 true WO2011145162A1 (ja) | 2011-11-24 |
Family
ID=44991289
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2010/058279 WO2011145162A1 (ja) | 2010-05-17 | 2010-05-17 | 流路接続部のシール構造体 |
Country Status (4)
Country | Link |
---|---|
US (1) | US9103810B2 (ja) |
JP (1) | JP5273302B2 (ja) |
CN (1) | CN102893065B (ja) |
WO (1) | WO2011145162A1 (ja) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104805577B (zh) * | 2014-01-27 | 2017-07-14 | 陈仁惠 | 导纱磁眼的固定装置 |
CN108730519B (zh) * | 2018-07-25 | 2023-09-29 | 湖南省天骑医学新技术股份有限公司 | 一种带有负压支撑平台的密封胶座及制作方法 |
JP7156395B2 (ja) * | 2018-12-12 | 2022-10-19 | 株式会社島津製作所 | クロマトグラフ用オートサンプラ |
JP7400704B2 (ja) * | 2020-11-26 | 2023-12-19 | 株式会社島津製作所 | クロマトグラフ用接続アセンブリ |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5681585U (ja) * | 1979-11-26 | 1981-07-01 | ||
JP2003215118A (ja) * | 2002-01-29 | 2003-07-30 | Shimadzu Corp | 液体クロマトグラフ用オートサンプラ |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2240610B (en) * | 1990-02-05 | 1993-12-08 | Devilbiss Co | Needle packing assembly |
US7105043B2 (en) * | 2003-10-03 | 2006-09-12 | O'neil Gregory Gerard | Sealing mechanism for gas chromatograph machines |
CN2826428Y (zh) * | 2005-02-04 | 2006-10-11 | 安捷伦科技有限公司 | 具有改进密封装置的气相色谱仪进样口 |
US7384457B2 (en) * | 2005-10-21 | 2008-06-10 | Agilent Technologies, Inc. | Seal for gas chromatography |
JP4993445B2 (ja) | 2006-08-30 | 2012-08-08 | 株式会社日立ハイテクノロジーズ | 試料導入装置 |
-
2010
- 2010-05-17 CN CN201080066812.6A patent/CN102893065B/zh active Active
- 2010-05-17 US US13/698,264 patent/US9103810B2/en active Active
- 2010-05-17 WO PCT/JP2010/058279 patent/WO2011145162A1/ja active Application Filing
- 2010-05-17 JP JP2012515652A patent/JP5273302B2/ja active Active
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5681585U (ja) * | 1979-11-26 | 1981-07-01 | ||
JP2003215118A (ja) * | 2002-01-29 | 2003-07-30 | Shimadzu Corp | 液体クロマトグラフ用オートサンプラ |
Also Published As
Publication number | Publication date |
---|---|
JP5273302B2 (ja) | 2013-08-28 |
CN102893065A (zh) | 2013-01-23 |
US20130062836A1 (en) | 2013-03-14 |
US9103810B2 (en) | 2015-08-11 |
CN102893065B (zh) | 2015-11-25 |
JPWO2011145162A1 (ja) | 2013-07-22 |
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