WO2014080925A1 - 配管連結継手 - Google Patents
配管連結継手 Download PDFInfo
- Publication number
- WO2014080925A1 WO2014080925A1 PCT/JP2013/081238 JP2013081238W WO2014080925A1 WO 2014080925 A1 WO2014080925 A1 WO 2014080925A1 JP 2013081238 W JP2013081238 W JP 2013081238W WO 2014080925 A1 WO2014080925 A1 WO 2014080925A1
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- WIPO (PCT)
- Prior art keywords
- pipe
- elastic body
- ferrule
- lumen
- compression screw
- Prior art date
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L19/00—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on or into one of the joint parts
- F16L19/06—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on or into one of the joint parts in which radial clamping is obtained by wedging action on non-deformed pipe ends
- F16L19/065—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on or into one of the joint parts in which radial clamping is obtained by wedging action on non-deformed pipe ends the wedging action being effected by means of a ring
-
- 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
- G01N30/60—Construction of the column
- G01N30/6034—Construction of the column joining multiple columns
- G01N30/6039—Construction of the column joining multiple columns in series
-
- 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
- G01N30/60—Construction of the column
- G01N30/6004—Construction of the column end pieces
- G01N30/6026—Fluid seals
Definitions
- the present invention relates to a pipe joint used in an apparatus that handles a high-pressure fluid such as a liquid chromatograph system.
- a mobile phase is sent by a pump device and sent to an analysis column together with a sample introduced by an autosampler. After the sample introduced into the analytical column is separated into the respective components, the components are detected by the detector.
- a pipe coupling joint used for inserting a pipe into an analysis column generally includes a ferrule and a compression screw for pressing the ferrule against the receiving surface.
- the ferrule Under the condition that the pressure of the liquid to be fed is 40 to 60 MPa, the ferrule is deformed so that the pressing force is applied by the compression screw so that the tip part enters the gap of the receiving surface, so that the liquid seal and piping Held both roles.
- Patent Document 1 in order to solve the above problem, a pipe clamp is provided separately from the ferrule and is forcibly held by mechanical means.
- the shape of the pipe connection part of the analytical column is mainly determined based on the flow path of the mobile phase liquid, the pipe insertion part for inserting the pipe, the conical ferrule receiving surface for receiving the ferrule, and the shape of the female screw for compression. Therefore, depending on the type of the analytical column, the shape of the pipe connection part, particularly the depth of the pipe insertion part into which the pipe is inserted, varies greatly. Therefore, for example, when connecting the pipe to the analytical column, the operator inserts the pipe into the pipe insertion portion, and tightens the compression screw while pressing it against the bottom surface of the insertion portion, thereby reducing the dead volume. That is, it is necessary to work with both hands for piping connection work, and there is a problem that workability is low.
- An object of the present invention is to provide a pipe joint that can improve analysis accuracy and can be used repeatedly when replacing an analytical column, even in an ultra-high performance liquid chromatograph apparatus that handles a high-pressure fluid.
- a ferrule having a lumen into which a pipe is inserted and having one end formed in a wedge shape, a lumen having a first diameter (x1) into which the pipe is inserted, A compression screw having a lumen having a second diameter (x2) different in size from the first diameter (x1) and having a recess formed at one end to receive the other end of the ferrule; An elastic body support portion inserted into the lumen of the second diameter (x2) and fixed in advance to the pipe; and an elastic member inserted into the lumen of the second diameter (x2) and movably supporting the pipe.
- An elastic body supporting portion that includes a body, a lumen into which the pipe is inserted, and that is inserted into the compression screw and supports an elastic body at one end; and the elastic body, and the elastic body, A pipe clamp fixed in advance to the pipe so as to interpose the elastic body support portion; and the pipe It includes a lumen that is inserted, provides a pipe connection joint is characterized in that and a pipe clamp holder for supporting one end portion of the pipe clamp.
- liquid chromatograph apparatus in the liquid chromatograph apparatus, it is possible to improve the analysis accuracy and to repeatedly use the pipe joint when the analysis column is replaced.
- FIG. 1 is a basic configuration diagram of a liquid chromatograph apparatus.
- FIG. 2 is a cross-sectional view showing an example of a pipe connection joint structure.
- FIG. 3A is a diagram illustrating an example of a first connection state between the pipe coupling joint and the analysis column.
- FIG. 3B is a diagram illustrating an example of a second connection state between the pipe coupling joint and the analysis column.
- FIG. 3C is a diagram illustrating an example of a third connection state between the pipe coupling joint and the analysis column.
- FIG. 4A is a diagram illustrating a first relationship between the length of pipe protrusion and the amount of deformation of the elastic body.
- FIG. 4B is a diagram illustrating a second relationship between the length of the protruding pipe and the amount of deformation of the elastic body.
- FIG. 5 is a cross-sectional view showing another example of the pipe connection joint structure.
- FIG. 1 shows a basic configuration diagram of a liquid chromatograph apparatus.
- This apparatus includes a liquid feed pump 101, an autosampler 102 for injecting a sample, an analysis column 103, a column oven 104 for keeping the analysis column at a constant temperature, and a detector 105.
- FIG. 2 is a cross-sectional view showing an example of the pipe joint structure of the embodiment.
- a ferrule 201 for sealing a fluid has a ferrule tip portion 210 having a wedge-shaped cross section, and has a lumen into which a pipe 209 is inserted.
- the compression screw 202 includes a ferrule receiving portion 212 formed to receive the ferrule 201 and a first male screw 213 that fixes the ferrule 201.
- the compression screw 202 has a hollow structure having a lumen having a first diameter (x1) for inserting the pipe 209 and a lumen having a second diameter (x2) larger than the first diameter (x1). 215.
- a pipe 209, an elastic body receiver 204 fixed in advance at a predetermined position of the pipe 209, an elastic body ring 205, and an elastic body support portion 207 are arranged.
- the elastic body support part 207 is fixed to the compression screw 202. In this manner, by attaching the elastic body support portion 207 to the compression screw 202, the pipe 209 is supported by the elastic body 206, and is movable in the axial direction.
- a pipe clamp 208 fixed in advance to the pipe 209 is disposed at a position separated from the ferrule 201, and the pipe clamp holder 203 that mechanically holds the pipe clamp 208 is a second male screw 214 of the compression screw 202. It can be screwed on. By tightening the pipe clamp holder 203 to the compression screw 202, the pipe clamp 208 holds the pipe 209.
- the pipe 209 is structured to be movable in the axial direction, it is not necessary to turn the compression screw 202 while pressing the pipe 209 as in the conventional pipe connection, and the compression screw 202 is It can be used for various analytical column pipe insertion depths simply by mounting. Moreover, since the variation of the dead volume by the operator is reduced, the analysis accuracy can be improved. Further, a pipe clamp 208 fixed in advance to the pipe is provided at a position separated from the ferrule 201, and the pipe clamp holder 203 is attached to the compression screw 202 to press the pipe clamp 208, thereby realizing a high pressure pipe joint. be able to.
- the pipe clamp 208 is fixed in advance to a predetermined position of the pipe 209 with respect to various pipe insertion depths of the analytical column, and the structure is made by changing the mounting position of the pipe clamp holder 203.
- the pipe 209 is not damaged, and the pipe holding force is not impaired.
- the elastic body support portion 207 is structured to be screwed to the compression screw 202, but another fixing method such as press-fitting or caulking may be used.
- the elastic ring 205 is provided in the present embodiment, the elastic ring 205 can be omitted by changing the size of the elastic receiver 204 so that the elastic body 206 can be sufficiently received. it can.
- FIG. 3A, FIG. 3B, and FIG. 3C are diagrams showing an example of a connection sequence in the pipe connection joint structure shown in FIG. The connection sequence will be described below with reference to the drawings.
- the pipe clamp holder 203 Prior to connecting the pipes, as shown in FIG. 3A, the pipe clamp holder 203 is loosened to a position with a sufficient margin with respect to the pipe protrusion 211 from the ferrule 201 and separated from the ferrule 201. In this state, the pipe protrusion 211 can be inserted into the pipe insertion portion 301 of various types of analysis columns.
- the compression screw 202 is attached to the analysis column 302 from the state of FIG. 3A. This state is shown in FIG. 3B.
- the compression screw 202 When the compression screw 202 is attached while rotating in the direction of the analysis column 302, the end face of the pipe 209 comes into contact with the bottom face of the pipe insertion portion 301 of the analysis column 302. Thereafter, when the compression screw 202 is further rotated in the same direction, the pipe 209 moves in the axial direction and in the direction opposite to the analysis column 302. As the pipe 209 moves, the elastic body receiver 204 and the elastic body receiving ring 205 fixed in advance also move in the same direction as the pipe 209 to deform the elastic body 206.
- the reaction force due to the deformation of the elastic body 206 becomes a force pressing the end face of the pipe 209 against the bottom surface of the pipe insertion part 301 of the analysis column 302, and the dead volume between the analysis column 302 and the pipe insertion part 301 is reduced.
- the compression screw 202 is further rotated and tightened, the ferrule tip portion 210 formed in a wedge shape on the ferrule 201 comes into contact with the ferrule tip receiving portion 303.
- the pipe 209 is preliminarily formed based on the pipe protrusion 211 from the ferrule 201 and the elastic body deformation amount 401, that is, the strength of the support force of the pipe 209 by the elastic body 206.
- the pipe connection joint can be used a plurality of times as described above.
- FIG. 4A and FIG. 4B are diagrams showing the relationship between the length of the protruding pipe and the deformation amount of the elastic body.
- FIG. 4A shows a connection state between the pipe and the analytical column when the pipe protrusion 211 is long and FIG. 4B shows a case where the pipe protrusion 211 is short.
- the elastic body deformation amount 401 varies depending on the difference of the pipe protrusion 211. That is, the shorter the pipe protrusion 211 from the ferrule tip 210 when the pipe 209 is inserted into the pipe insertion section 301 of the analysis column 302, the larger the elastic body deformation amount 401, and the distance between the ferrule 201 and the pipe clamp 208 is It has a long relationship.
- the pressing force against the bottom surface of the pipe insertion portion 301 needs to generate a sufficient pressing force to reduce the dead volume.
- the distance between the ferrule 201 and the pipe clamp 208 is determined based on the pressing force generated by the pipe protrusion 211 and the elastic body deformation amount 401.
- FIG. 5 is a cross-sectional view showing another example of the pipe joint structure.
- a ferrule 201 for sealing a liquid has a ferrule tip 210 having a wedge-shaped cross section and another end 501 provided with a male reverse screw 506, and has a lumen into which a pipe 209 is inserted.
- the compression screw 202 has a ferrule receiving portion 502 formed to receive the ferrule 201.
- the ferrule receiving portion 502 is formed with a female reverse screw 507 coupled to a male reverse screw 506 provided at the other end portion 501 of the ferrule 201.
- the compression screw 202 has a hollow structure 215 formed by a lumen having a first diameter (x1) for inserting the pipe 209 and a lumen having a second diameter (x2) larger than the first diameter (x1). have.
- a pipe 209, a pipe clamp 208 previously fixed at a predetermined position of the pipe 209, a dish-shaped elastic body receiver 503, and a pipe clamp support portion 504 are arranged.
- the pipe clamp 208 is always pressed by the dish-shaped elastic body receiver 503 and the pipe clamp support member 504, and can hold the pipe 209 more firmly.
- the present invention is not limited to the configuration of the above-described embodiment, and any configuration can be used as long as the functions shown in the claims or the functions of the configuration of the present embodiment can be achieved. Applicable.
Abstract
Description
特に、分析メソッドの開発等に使用される場合においては、複数の分析カラムを頻繁に交換するため、配管連結継手を繰り返し使用する必要がある。
<実施例1>
また、作業者によるデッドボリュームのバラツキを低減するため、分析精度を向上することができる。
また、フェラル201から離間された位置に配管に予め固定された配管クランプ208を設け、配管クランプホルダ203を圧縮ねじ202に取りつけることで配管クランプ208を押圧し、高耐圧の配管連結継手を実現することができる。
<実施例2>
<実施例3>
<実施例4>
また、圧縮ねじ202は、配管209を挿入するための第一の径(x1)の内腔と、第一の径(x1)よりも大きい第二の径(x2)の内腔による中空構造215を有している。第二の径(x2)の内腔の中には、配管209と、予め配管209の所定の位置に固定された配管クランプ208と、皿型弾性体受け503と、配管クランプ支持部504が配置されている。配管クランプ208は皿型弾性体受け503と配管クランプ支持部材504によって常に押圧された状態となり、配管209をより強固に保持することができる。
さらに、配管クランプホルダ203が圧縮ねじ202に対して締付けていくことで、配管クランプホルダ203から与えられる力によって皿型弾性体505を変形させ、皿型弾性体受け503を押圧する。
このような構成とすることにより、分析中等に生じる温度変動による押圧力の低下を低減することができる。
102 オートサンプラ
103 分析カラム
104 カラムオーブン
105 検出器
201 フェラル
202 圧縮ねじ
203 配管クランプホルダ
204 弾性体受け(第1の弾性体支持部)
205 弾性体受けリング
206 弾性体
207 弾性体支持部(第2の弾性体支持部)
208 配管クランプ
209 配管
210 フェラル先端部
211 配管突き出し
212 フェラル受け部
213 第一の雄ねじ
214 第二の雄ねじ
215 中空構造
301 配管挿入部
302 分析カラム
303 フェラル先端受け部
401 弾性体変形量
501 フェラル他端部
502 圧縮ねじ先端部
503 皿型弾性体受け
504 配管クランプ支持部
505 皿型弾性体
506 雄逆ネジ
507 雌逆ネジ
x1 第一の径
x2 第二の径
Claims (6)
- 液体クロマトグラフ装置におけるカラムと配管とを接続する配管連結継手であって、
配管が挿入される内腔を備え、一端部が楔形に形成されたフェラルと、
前記配管が挿入される第一の径の内腔と、前記第一の径と大きさの異なる第二の径の内腔を備え、一端部に前記フェラルの他端部を受け入れるように凹部が形成された圧縮ねじと、
前記第二の径の内腔に挿入され、前記配管に予め固定された第1の弾性体支持部と、
前記第二の径の内腔に挿入され、前記配管を移動可能に支持する弾性体と、
前記配管が挿入される内腔を備え、前記圧縮ねじに固定されて当該圧縮ねじに挿入された弾性体を一端部で支持する第2の弾性体支持部と、
前記第1の弾性体支持部との間に、前記弾性体、及び前記第2の弾性体支持部を介在させるように、前記配管に予め固定された配管クランプと、
前記配管が挿入される内腔を備え、前記配管クランプの一端部を支持する配管クランプホルダと、を備えたことを特徴とする配管連結継手。 - 請求項1に記載された配管連結継手であって、
前記カラムと前記配管とを接続したときに、前記フェラルの一端部側の内腔から突き出した前記配管の長さに基づいて、
前記フェラルと前記配管クランプとの間の距離が変化することを特徴とする配管連結継手。 - 請求項2に記載された配管連結継手であって、
前記フェラルの一端部側の内腔から突き出した前記配管の長さが長くなるほど、
前記フェラルと前記配管クランプとの間の距離が短くなるように変化することを特徴とする配管連結継手。 - 請求項1に記載された配管連結継手であって、
前記圧縮ねじと、前記弾性体支持部とは、ねじ締めにより接続されることを特徴とする配管連結継手。 - 請求項1に記載された配管連結継手であって、
前記圧縮ねじと、前記弾性体支持部とは、圧入またはかしめにより接続されることを特徴とする配管連結継手。 - 請求項1に記載された配管連結継手であって、
前記カラムに前記配管が突き当たるように前記圧縮ねじを前記カラムの方向に回転させながら取り付けて、前記弾性体の反力により前記配管を前記カラムに押し付けるとともに、前記フェラルによる液体シール面を形成する第1の段階と、
前記配管クランプホルダを前記圧縮ねじに締め込んで前記配管クランプを保持する第2の段階の操作により、前記配管と前記カラムを接続する
ことを特徴とする配管連結継手。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
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JP2014548589A JP5967217B2 (ja) | 2012-11-21 | 2013-11-20 | 配管連結継手およびその連結方法 |
CN201380059258.2A CN104781665B (zh) | 2012-11-21 | 2013-11-20 | 配管连结接头 |
DE112013005106.0T DE112013005106B4 (de) | 2012-11-21 | 2013-11-20 | Rohrverbindungsanschluss |
US14/441,611 US9470346B2 (en) | 2012-11-21 | 2013-11-20 | Pipe connection joint |
Applications Claiming Priority (2)
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JP2012-254836 | 2012-11-21 | ||
JP2012254836 | 2012-11-21 |
Publications (1)
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WO2014080925A1 true WO2014080925A1 (ja) | 2014-05-30 |
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PCT/JP2013/081238 WO2014080925A1 (ja) | 2012-11-21 | 2013-11-20 | 配管連結継手 |
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US (1) | US9470346B2 (ja) |
JP (1) | JP5967217B2 (ja) |
CN (1) | CN104781665B (ja) |
DE (1) | DE112013005106B4 (ja) |
WO (1) | WO2014080925A1 (ja) |
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WO2018116432A1 (ja) * | 2016-12-22 | 2018-06-28 | 株式会社 日立ハイテクノロジーズ | カラム及び交換装置 |
JP2019080012A (ja) * | 2017-10-27 | 2019-05-23 | 京セラ株式会社 | 試料保持具 |
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WO2015177901A1 (ja) * | 2014-05-22 | 2015-11-26 | 株式会社島津製作所 | カラム取付装置及びフェルールセット |
DE102017012353B3 (de) | 2016-04-11 | 2023-01-05 | Micromass Uk Limited | Adapter zur Verbindung einer Ionisationsprobenanordnung mit einem Massen- und/oder Ionenmobilitätsspektrometer |
GB2564603B (en) * | 2016-05-17 | 2021-01-20 | Hitachi High Tech Corp | Separation column connection device, connection method, and analysis system |
JP7147594B2 (ja) * | 2019-01-28 | 2022-10-05 | 株式会社島津製作所 | クロマトグラフィ検出器 |
JPWO2020175651A1 (ja) * | 2019-02-27 | 2020-09-03 | ||
CN113339607A (zh) * | 2021-04-29 | 2021-09-03 | 北京明德正康医学研究有限公司 | 用于连接流体通路的组合装置 |
US11767938B2 (en) * | 2021-07-27 | 2023-09-26 | Thermo Finnigan Llc | Compression nut or fitting with removable plunger for easily dislodging stuck ferrules |
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- 2013-11-20 US US14/441,611 patent/US9470346B2/en active Active
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US9470346B2 (en) | 2016-10-18 |
CN104781665B (zh) | 2016-08-31 |
JPWO2014080925A1 (ja) | 2017-01-05 |
US20150285414A1 (en) | 2015-10-08 |
DE112013005106B4 (de) | 2021-03-18 |
DE112013005106T5 (de) | 2015-07-09 |
CN104781665A (zh) | 2015-07-15 |
JP5967217B2 (ja) | 2016-08-10 |
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