WO2020039521A1 - Flow channel switching valve - Google Patents
Flow channel switching valve Download PDFInfo
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- WO2020039521A1 WO2020039521A1 PCT/JP2018/030992 JP2018030992W WO2020039521A1 WO 2020039521 A1 WO2020039521 A1 WO 2020039521A1 JP 2018030992 W JP2018030992 W JP 2018030992W WO 2020039521 A1 WO2020039521 A1 WO 2020039521A1
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- WIPO (PCT)
- Prior art keywords
- housing
- rotor
- stator
- flow path
- switching valve
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- 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
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
- F16K11/02—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit
- F16K11/06—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements
- F16K11/065—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members
- F16K11/07—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members with cylindrical slides
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- 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
- G01N30/20—Injection using a sampling valve
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- 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
- G01N30/26—Conditioning of the fluid carrier; Flow patterns
Definitions
- the present invention relates to a rotary switching valve having a port for connecting a plurality of pipes and switching a connection state between the ports by rotation of a rotor.
- a rotary switching valve In an analyzer such as a high-performance liquid chromatograph (hereinafter, HPLC), a rotary switching valve is often used as a valve for switching a connection state of a flow path.
- the rotary switching valve switches a connection state between flow paths by sliding a rotor with a stator inside a housing.
- a general switching valve has a plurality of connection ports at an upper portion of a housing (housing top), and a pipe is fixed to each connection port by a fixing member.
- a flow path communicating with a pipe fixed to the connection port is provided inside the housing top, and the pipe fixed to the connection port communicates with the rotor via a flow path in the housing top (Patent) Reference 1).
- a substance for example, a phosphorylated peptide having an adsorptive property to a metal. May not be able to obtain accurate analysis results.
- a sample containing such a substance is to be analyzed under high pressure conditions, a switching valve with a high withstand pressure is required, but in order to make the switching valve with a high withstand pressure, the pipe is fixed by screwing screws.
- the housing top must be made of high hardness stainless steel or titanium. However, when doing so, the surface of the flow path provided inside the housing top becomes metal. Since the flow path inside the housing top is formed very thin, 0.1 to 0.5 mm, it is difficult to cover the inner surface of such a flow path with a non-metallic film such as DLC.
- an object of the present invention is to realize a high-withstand-pressure switching valve in which a metal surface does not exist in a flow path of a liquid.
- the switching valve according to the present invention is provided with a groove that forms a flow path on one surface, the disk-shaped rotor in which the one surface including the inner surface of the groove is non-metal, A rotor drive unit for holding and rotating the rotor, and a housing accommodating the rotor therein, and having a plurality of pipe fixing units for fixing the pipe by a fixing member using screwing of screws.
- a housing having a housing top in a direction in which the one surface of the rotor faces, and being held by the housing in a state interposed between the rotor and the housing top, fixed to the housing top by the fixing member
- a non-metallic stator having a flow path that is in direct contact with the tip of the pipe and connects the pipe to the rotor.
- the pipe is fixed to the housing top of the housing, the flow path for flowing the liquid is not provided inside the housing top.
- the tip of the pipe fixed to the housing top is in direct contact with the stator interposed between the rotor and the housing top, and communicates with the groove of the rotor via a flow path provided in the stator. Therefore, the housing top does not come into contact with the liquid, the housing top can be made of a hard metal material, and pressure resistance can be secured. Since the stator is made of a nonmetallic material and the surface of the rotor on the stator side is nonmetallic, the liquid flowing in the switching valve does not come into contact with the metal surface.
- the housing has a cylindrical housing body to which the housing top is attached at a tip, and the stator has a peripheral portion between the housing body and the housing top. Is held by the housing by being sandwiched between the housings.
- the stator can be held in the housing by using a mechanism for attaching the housing top to the housing body.
- the housing body has a projection on a surface that supports a peripheral portion of the stator, the stator has a hole into which the projection is fitted, and the hole of the stator is formed in the hole of the stator. The position of the stator in the direction within the rotation plane of the rotor is fixed by fitting the projection.
- the rotor is, for example, a disk-shaped base material made of stainless steel or titanium with the DLC film formed on a surface thereof.
- the tip of the pipe fixed to the housing top directly contacts the non-metallic stator interposed between the rotor and the housing top, and the non-metallic via the flow path provided in the stator.
- a high-pressure switching valve having no metal surface in the flow path of the liquid.
- the flow path switching valve of this embodiment mainly includes the housing 2, the rotor 4, the stator 6, and the drive shaft 8 (rotor drive unit).
- the housing 2 includes a cylindrical housing body 2a, and a housing top 2b attached to the housing body 2a so as to close an opening on the distal end side (upper side in the figure) of the housing body 2a.
- the rotor 4 is a disc-shaped member provided with a groove 4a forming a flow path on one surface.
- the rotor 4 is held at the tip of the drive shaft 8 by the fixing pin 10 in a state where one surface on which the groove 4a is provided faces the housing top 2b side inside the housing 2.
- the base end of the drive shaft 8 extends to the opposite side (lower side in the figure) to the housing top 2b, protrudes outside the housing body 2a, is connected to a rotation shaft of a stepping motor (not shown), and is rotated by the stepping motor. .
- the stator 6 is a disk-shaped member interposed between the housing top 2b and the rotor 4.
- the stator 6 is held by the housing 2 by a peripheral portion being sandwiched between the housing body 2a and the housing top 2b.
- the housing top 2b is fixed to the housing body 2a by bolts not shown in the drawing.
- the periphery of the stator 6 is also provided with a through hole through which a bolt for fixing the housing top 2b to the housing body 2a passes.
- the housing body 2a has a protrusion 22 on a surface (upper surface in the figure) supporting the peripheral portion of the stator 6.
- a hole 24 for fitting a projection of the housing body 2a is provided in a peripheral portion of the stator 6, and the position of the stator 6 with respect to the housing body 2a is fixed by fitting the projection 22 into the hole 24.
- the projection 22 is illustrated integrally with the housing body 2a in the figure, the present invention is not limited to this, and the projection 22 is realized by a part of a pin fitted into a hole provided in the housing body 2a. Is also good.
- the drive shaft 8 is urged toward the housing top 2b (upward in the figure) by an elastic member 12 formed of a coil spring or the like, whereby one surface of the rotor 4 provided with the groove 4a is positioned with respect to the stator 6. It is imposed.
- the drive shaft 8 rotates, the rotor 6 and the stator 6 slide with each other.
- the housing top 2b is provided with pipe fixing portions 14 and 18 for fixing the pipe by a fixing member utilizing screwing of screws.
- the stator 6 is provided with flow paths 16 and 20 for connecting a pipe fixed to the housing top 2 b to the rotor 4.
- the tip of the pipe fixed to the housing top 2b by the fixing member directly contacts the stator 6, and is connected to the flow paths 16 and 20 while maintaining liquid tightness. That is, the housing top 2b is not provided with a flow path that contacts the liquid.
- the housing top 2b having the pipe fixing portions 14 and 18 is made of a highly rigid metal material such as stainless steel.
- the stator 6 having the flow paths 16 and 20 through which the liquid flows flows is made of a nonmetallic material such as polyetheretherketone (PEEK).
- PEEK polyetheretherketone
- the rotor 4 is made of a highly rigid metal material such as stainless steel or titanium, and a DLC film 26 is formed as a non-metal film on the surface of the stator 6 including the inner surface of the groove 4a.
- the fixing member when connecting the pipe to the switching valve, the fixing member can be fastened with a strong force to the housing top 2b having high rigidity. Can be pressed against the stator 6. Thereby, high pressure resistance performance can be realized. Further, since the stator 6 is made of a non-metallic material and the DLC film 26 is formed on the surface of the rotor 4 on the stator 6 side, the liquid flowing in the switching valve does not come into contact with the metal. Therefore, even when analyzing a sample containing a component having adsorbability to a metal, adsorption of the sample component in the switching valve can be prevented.
- the flow path switching valve of the present embodiment is used for a fluid chromatograph such as a liquid chromatograph, a supercritical fluid chromatograph, and an ion chromatograph.
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- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Multiple-Way Valves (AREA)
Abstract
This switching valve comprises: a discoid rotor in which a groove forming a flow channel is provided in one surface and in which the one surface including the inner surface of the groove is non-metal; a rotor drive unit for holding the rotor at a distal end thereof and causing the rotor to rotate; a housing that accommodates the rotor therein, the housing having, in a direction faced by the one surface of the rotor, a housing top that has a plurality of piping-securing parts for securing piping through use of a securing member that utilizes screwing of screws; and a non-metal stator that is retained in the housing in a state of being interposed between the rotor and the housing, is directly in contact with the distal end of piping secured to the housing top by the securing member, and has a flow path for allowing the piping to communicate with the rotor.
Description
本発明は、複数の配管を接続するためのポートを有し、それらのポート間の接続状態をロータの回転によって切り替えるロータリー式の切替バルブに関するものである。
The present invention relates to a rotary switching valve having a port for connecting a plurality of pipes and switching a connection state between the ports by rotation of a rotor.
高速液体クロマトグラフ（以下、ＨＰＬＣ）などの分析装置では、流路の接続状態を切り替えるためのバルブとしてロータリー式の切替バルブがよく用いられる。ロータリー式の切替バルブは、ハウジングの内部でロータをステータと摺動させて流路間の接続状態を切り替えるものである。一般的な切替バルブは、ハウジングの上部（ハウジングトップ）に複数の接続ポートをもち、それぞれの接続ポートに配管が固定部材によって固定される。ハウジングトップの内部には、接続ポートに固定された配管と連通される流路が設けられており、接続ポートに固定された配管はハウジングトップ内の流路を介してロータへ通じている（特許文献１参照。）。
(4) In an analyzer such as a high-performance liquid chromatograph (hereinafter, HPLC), a rotary switching valve is often used as a valve for switching a connection state of a flow path. The rotary switching valve switches a connection state between flow paths by sliding a rotor with a stator inside a housing. A general switching valve has a plurality of connection ports at an upper portion of a housing (housing top), and a pipe is fixed to each connection port by a fixing member. A flow path communicating with a pipe fixed to the connection port is provided inside the housing top, and the pipe fixed to the connection port communicates with the rotor via a flow path in the housing top (Patent) Reference 1).
上記のような切替バルブでは、長期間の使用によってロータとステータとの間の摺動面が摩耗し、ロータの回転トルクの増大、流体の漏洩、クロスコンタミネーションの増大などを引き起こすことが知られている。特に、１００ＭＰａといった高い圧力条件下で使用される高耐圧の切替バルブでは、ロータとステータの間の摺動面が摩耗しやすいため、ステータとロータの少なくともいずれか一方の摺動面に硬質のＤＬＣ（ダイヤモンドライクカーボン）膜を形成することが提案され、実施もなされている（特許文献２、３参照。）。
In the switching valve as described above, it is known that the sliding surface between the rotor and the stator wears out over a long period of time, causing an increase in the rotational torque of the rotor, leakage of fluid, an increase in cross contamination, and the like. ing. In particular, in a switching valve having a high withstand pressure used under a high pressure condition of 100 MPa, a sliding surface between the rotor and the stator is easily worn, so that at least one of the sliding surfaces of the stator and the rotor has a hard DLC. It has been proposed and practiced to form a (diamond-like carbon) film (see Patent Documents 2 and 3).
ＨＰＬＣで分析される試料成分の中には、金属に対して吸着性をもつ物質（例えば、リン酸化ペプチド）が存在し、試料の流れる流路の内面が金属であるとその物質が流路表面に吸着してしまい、正確な分析結果を得られなくなる虞がある。そのような物質を含む試料を高圧条件下で分析しようとした場合、高耐圧の切替バルブが必要となるが、切替バルブを高耐圧にするためには、ネジの螺合によって配管が固定されるハウジングトップを高硬度のステンレスやチタンなどで構成する必要がある。しかし、そうするとハウジングトップの内部に設けられている流路の表面が金属となってしまう。ハウジングトップの内部の流路は０．１～０．５ｍｍと非常に細く形成されているため、そのような流路の内面をＤＬＣ等の非金属製の膜で覆うことは困難である。
Among the sample components analyzed by HPLC, there is a substance (for example, a phosphorylated peptide) having an adsorptive property to a metal. May not be able to obtain accurate analysis results. If a sample containing such a substance is to be analyzed under high pressure conditions, a switching valve with a high withstand pressure is required, but in order to make the switching valve with a high withstand pressure, the pipe is fixed by screwing screws. The housing top must be made of high hardness stainless steel or titanium. However, when doing so, the surface of the flow path provided inside the housing top becomes metal. Since the flow path inside the housing top is formed very thin, 0.1 to 0.5 mm, it is difficult to cover the inner surface of such a flow path with a non-metallic film such as DLC.
そこで、本発明は、液の流れる経路に金属表面の存在しない高耐圧の切替バルブを実現することを目的とするものである。
Therefore, an object of the present invention is to realize a high-withstand-pressure switching valve in which a metal surface does not exist in a flow path of a liquid.
本発明に係る切替バルブは、一方の面に流路をなす溝が設けられており、前記溝の内面を含む前記一方の面が非金属である円板状のロータと、前記ロータを先端で保持して前記ロータを回転させるためのロータ駆動部と、前記ロータを内部に収容するハウジングであって、ネジの螺合を利用する固定部材によって配管を固定するための複数の配管固定部をもつハウジングトップを、前記ロータの前記一方の面が向く方向に有するハウジングと、前記ロータと前記ハウジングトップとの間に介在した状態で前記ハウジングに保持され、前記固定部材によって前記ハウジングトップに固定された配管の先端と直接的に接し、前記配管を前記ロータにまで連通させるための流路を有する非金属製のステータと、を備えている。
The switching valve according to the present invention is provided with a groove that forms a flow path on one surface, the disk-shaped rotor in which the one surface including the inner surface of the groove is non-metal, A rotor drive unit for holding and rotating the rotor, and a housing accommodating the rotor therein, and having a plurality of pipe fixing units for fixing the pipe by a fixing member using screwing of screws. A housing having a housing top in a direction in which the one surface of the rotor faces, and being held by the housing in a state interposed between the rotor and the housing top, fixed to the housing top by the fixing member A non-metallic stator having a flow path that is in direct contact with the tip of the pipe and connects the pipe to the rotor.
すなわち、本発明の切替バルブでは、ハウジングのハウジングトップに配管が固定されるものの、ハウジングトップの内部には液の流れる流路が設けられていない。ハウジングトップに固定された配管の先端はロータとハウジングトップとの間に介在するステータに直接的に接し、ステータに設けられた流路を介してロータの溝と連通する。したがって、ハウジングトップが液と接触することがなく、ハウジングトップを硬質の金属材料で構成することができ、耐圧性を確保することができる。ステータは非金属材料で構成され、ロータのステータ側の面は非金属であるので、切替バルブ内を流れる液が金属表面と接触することはない。
That is, in the switching valve of the present invention, although the pipe is fixed to the housing top of the housing, the flow path for flowing the liquid is not provided inside the housing top. The tip of the pipe fixed to the housing top is in direct contact with the stator interposed between the rotor and the housing top, and communicates with the groove of the rotor via a flow path provided in the stator. Therefore, the housing top does not come into contact with the liquid, the housing top can be made of a hard metal material, and pressure resistance can be secured. Since the stator is made of a nonmetallic material and the surface of the rotor on the stator side is nonmetallic, the liquid flowing in the switching valve does not come into contact with the metal surface.
本発明の切替バルブの好ましい実施形態では、前記ハウジングは前記ハウジングトップが先端に装着される筒状のハウジングボディを有し、前記ステータは、その周縁部が前記ハウジングボディと前記ハウジングトップとの間に挟み込まれることによって前記ハウジングに保持されている。このような構造を採用することにより、ハウジングボディへのハウジングトップの取付け機構を利用してステータをハウジングに保持させることができる。
In a preferred embodiment of the switching valve of the present invention, the housing has a cylindrical housing body to which the housing top is attached at a tip, and the stator has a peripheral portion between the housing body and the housing top. Is held by the housing by being sandwiched between the housings. By adopting such a structure, the stator can be held in the housing by using a mechanism for attaching the housing top to the housing body.
さらに好ましい実施形態では、前記ハウジングボディは前記ステータの周縁部を支持する面に突起を有し、前記ステータは前記突起が嵌め込まれる穴が形成されており、前記ステータの前記穴に前記ハウジングボディの前記突起が嵌め込まれることによって、前記ロータの回転平面内方向における前記ステータの位置が固定されるように構成されている。
In a further preferred embodiment, the housing body has a projection on a surface that supports a peripheral portion of the stator, the stator has a hole into which the projection is fitted, and the hole of the stator is formed in the hole of the stator. The position of the stator in the direction within the rotation plane of the rotor is fixed by fitting the projection.
前記ロータは、例えば、ステンレス又はチタンからなる円板状の母材の表面に前記ＤＬＣ膜が形成されたものである。
The rotor is, for example, a disk-shaped base material made of stainless steel or titanium with the DLC film formed on a surface thereof.
本発明の切替バルブは、ハウジングトップに固定された配管の先端がロータとハウジングトップとの間に介在する非金属製のステータに直接的に接し、ステータに設けられた流路を介して非金属のロータ溝と連通するようになっているので、液の流れる経路に金属表面の存在しない高耐圧の切替バルブが実現される。
According to the switching valve of the present invention, the tip of the pipe fixed to the housing top directly contacts the non-metallic stator interposed between the rotor and the housing top, and the non-metallic via the flow path provided in the stator. And a high-pressure switching valve having no metal surface in the flow path of the liquid.
以下に、本発明に係る流路切替バルブの一実施例について、図１の断面図を用いて説明する。
Hereinafter, an embodiment of the flow path switching valve according to the present invention will be described with reference to the cross-sectional view of FIG.
この実施例の流路切替バルブは、主として、ハウジング２、ロータ４、ステータ６及び駆動軸８（ロータ駆動部）を備えている。ハウジング２は、円筒形状のハウジングボディ２ａ、及びハウジングボディ２ａの先端側（図において上側）の開口を塞ぐようにハウジングボディ２ａに装着されたハウジングトップ２ｂによって構成されている。
The flow path switching valve of this embodiment mainly includes the housing 2, the rotor 4, the stator 6, and the drive shaft 8 (rotor drive unit). The housing 2 includes a cylindrical housing body 2a, and a housing top 2b attached to the housing body 2a so as to close an opening on the distal end side (upper side in the figure) of the housing body 2a.
ロータ４は一方の面に流路をなす溝４ａが設けられた円板状の部材である。ロータ４は、ハウジング２の内部において、溝４ａが設けられている一方の面がハウジングトップ２ｂ側を向いた状態で、固定ピン１０によって駆動軸８の先端に保持されている。駆動軸８の基端はハウジングトップ２ｂとは反対側（図において下側）へ延び、ハウジングボディ２ａの外側へ突き出して図示されていないステッピングモータの回転軸と連結され、ステッピングモータによって回転させられる。
The rotor 4 is a disc-shaped member provided with a groove 4a forming a flow path on one surface. The rotor 4 is held at the tip of the drive shaft 8 by the fixing pin 10 in a state where one surface on which the groove 4a is provided faces the housing top 2b side inside the housing 2. The base end of the drive shaft 8 extends to the opposite side (lower side in the figure) to the housing top 2b, protrudes outside the housing body 2a, is connected to a rotation shaft of a stepping motor (not shown), and is rotated by the stepping motor. .
ステータ６はハウジングトップ２ｂとロータ４との間に介在する円板状の部材である。ステータ６は、周縁部がハウジングボディ２ａとハウジングトップ２ｂとの間に挟み込まれることによってハウジング２に保持されている。ハウジングトップ２ｂは、図では現れていないボルトによってハウジングボディ２ａに対して固定される。ステータ６の周縁部には、ハウジングトップ２ｂをハウジングボディ２ａに固定するボルトを貫通させる貫通孔も設けられている。
The stator 6 is a disk-shaped member interposed between the housing top 2b and the rotor 4. The stator 6 is held by the housing 2 by a peripheral portion being sandwiched between the housing body 2a and the housing top 2b. The housing top 2b is fixed to the housing body 2a by bolts not shown in the drawing. The periphery of the stator 6 is also provided with a through hole through which a bolt for fixing the housing top 2b to the housing body 2a passes.
ハウジングボディ２ａは、ステータ６の周縁部を支持する面（図において上面）に突起２２を備えている。ステータ６の周縁部にはハウジングボディ２ａの突起を嵌め込むための穴２４が設けられており、穴２４に突起２２が嵌め込まれることによってハウジングボディ２ａに対するステータ６の位置が固定される。図では、突起２２がハウジングボディ２ａと一体的に描かれているが、本発明はこれに限らず、ハウジングボディ２ａに設けられた穴に嵌め込まれたピンの一部によって突起２２を実現してもよい。
The housing body 2a has a protrusion 22 on a surface (upper surface in the figure) supporting the peripheral portion of the stator 6. A hole 24 for fitting a projection of the housing body 2a is provided in a peripheral portion of the stator 6, and the position of the stator 6 with respect to the housing body 2a is fixed by fitting the projection 22 into the hole 24. Although the projection 22 is illustrated integrally with the housing body 2a in the figure, the present invention is not limited to this, and the projection 22 is realized by a part of a pin fitted into a hole provided in the housing body 2a. Is also good.
駆動軸８はコイルバネなどからなる弾性部材１２によってハウジングトップ２ｂ側（図において上側）へ付勢されており、それによって、溝４ａが設けられているロータ４の一方の面がステータ６に対して押し付けられている。駆動軸８が回転すると、ロータ６とステータ６とが互いに摺動する。
The drive shaft 8 is urged toward the housing top 2b (upward in the figure) by an elastic member 12 formed of a coil spring or the like, whereby one surface of the rotor 4 provided with the groove 4a is positioned with respect to the stator 6. It is imposed. When the drive shaft 8 rotates, the rotor 6 and the stator 6 slide with each other.
ハウジングトップ２ｂには、ネジの螺合を利用する固定部材によって配管を固定するための配管固定部１４、１８が設けられている。ステータ６には、ハウジングトップ２ｂに固定された配管をロータ４にまで連通させるための流路１６、２０が設けられている。固定部材によってハウジングトップ２ｂに固定された配管の先端はステータ６に直接的に接触し、液密を保って流路１６、２０と接続される。すなわち、ハウジングトップ２ｂには、液を接触する流路が設けられていない。
The housing top 2b is provided with pipe fixing portions 14 and 18 for fixing the pipe by a fixing member utilizing screwing of screws. The stator 6 is provided with flow paths 16 and 20 for connecting a pipe fixed to the housing top 2 b to the rotor 4. The tip of the pipe fixed to the housing top 2b by the fixing member directly contacts the stator 6, and is connected to the flow paths 16 and 20 while maintaining liquid tightness. That is, the housing top 2b is not provided with a flow path that contacts the liquid.
配管固定部１４、１８を有するハウジングトップ２ｂは、ステンレスなど剛性の高い金属材料により構成されている。
The housing top 2b having the pipe fixing portions 14 and 18 is made of a highly rigid metal material such as stainless steel.
液の流れる流路１６、２０を有するステータ６は、ポリエーテルエーテルケトン（ＰＥＥＫ）などの非金属材料で構成されている。
The stator 6 having the flow paths 16 and 20 through which the liquid flows flows is made of a nonmetallic material such as polyetheretherketone (PEEK).
ロータ４は、ステンレスやチタンなど剛性の高い金属材料で構成されており、溝４ａの内面を含むステータ６側の面に、非金属膜としてＤＬＣ膜２６が形成されている。
The rotor 4 is made of a highly rigid metal material such as stainless steel or titanium, and a DLC film 26 is formed as a non-metal film on the surface of the stator 6 including the inner surface of the groove 4a.
以上の構成により、まず、この切替バルブに対して配管を接続する際に、剛性の高いハウジングトップ２ｂに対して強い力で固定部材を締結することができ、それによって、配管の先端を強い力でステータ６に押し付けることができる。それにより、高い耐圧性能を実現できる。さらに、ステータ６は非金属材料で構成され、ロータ４のステータ６側の面にＤＬＣ膜２６が形成されているため、切替バルブ内を流れる液が金属と接触することがない。したがって、金属に対して吸着性をもつ成分を含む試料の分析を行なう場合にも、切替バルブ内での試料成分の吸着を防止することができる。
With the above configuration, first, when connecting the pipe to the switching valve, the fixing member can be fastened with a strong force to the housing top 2b having high rigidity. Can be pressed against the stator 6. Thereby, high pressure resistance performance can be realized. Further, since the stator 6 is made of a non-metallic material and the DLC film 26 is formed on the surface of the rotor 4 on the stator 6 side, the liquid flowing in the switching valve does not come into contact with the metal. Therefore, even when analyzing a sample containing a component having adsorbability to a metal, adsorption of the sample component in the switching valve can be prevented.
本実施形態の流路切替バルブは、液体クロマトグラフ、超臨界流体クロマトグラフ、イオンクロマトグラフ等の流体クロマトグラフに使用される。
The flow path switching valve of the present embodiment is used for a fluid chromatograph such as a liquid chromatograph, a supercritical fluid chromatograph, and an ion chromatograph.
２ ハウジング
２ａ ハウジングボディ
２ｂ ハウジングトップ
４ ロータ
４ａ 溝
６ ステータ
８ 駆動軸（ロータ駆動部）
１０ ピン
１２ 弾性部材
１４，１８ 配管固定部
１６，２０ 流路
２２ 突起
２４ 穴
２６ ＤＬＣ膜 2Housing 2a Housing body 2b Housing top 4 Rotor 4a Groove 6 Stator 8 Drive shaft (rotor drive unit)
10pin 12 elastic member 14, 18 pipe fixing part 16, 20 flow path 22 protrusion 24 hole 26 DLC film
２ａ ハウジングボディ
２ｂ ハウジングトップ
４ ロータ
４ａ 溝
６ ステータ
８ 駆動軸（ロータ駆動部）
１０ ピン
１２ 弾性部材
１４，１８ 配管固定部
１６，２０ 流路
２２ 突起
２４ 穴
２６ ＤＬＣ膜 2
10
Claims (7)
- 一方の面に流路をなす溝が設けられており、前記溝の内面を含む前記一方の面が非金属である円板状のロータと、
前記ロータを先端で保持して前記ロータを回転させるためのロータ駆動部と、
前記ロータを内部に収容するハウジングであって、ネジの螺合を利用する固定部材によって配管を固定するための複数の配管固定部をもつハウジングトップを、前記ロータの前記一方の面が向く方向に有するハウジングと、
前記ロータと前記ハウジングトップとの間に介在した状態で前記ハウジングに保持され、前記固定部材によって前記ハウジングトップに固定された配管の先端と直接的に接し、前記配管を前記ロータにまで連通させるための流路を有する非金属製のステータと、を備えている、流体クロマトグラフ用流路切替バルブ。 A groove forming a flow path is provided on one surface, and the one surface including the inner surface of the groove is a non-metallic disk-shaped rotor,
A rotor driving unit for rotating the rotor while holding the rotor at the tip,
A housing for housing the rotor therein, wherein a housing top having a plurality of pipe fixing portions for fixing pipes by a fixing member utilizing screwing of a screw is provided in a direction in which the one surface of the rotor faces. A housing having
To be held by the housing in a state interposed between the rotor and the housing top, to directly contact the tip of the pipe fixed to the housing top by the fixing member, and to communicate the pipe to the rotor. And a non-metallic stator having a flow path as described above. - 前記ハウジングトップは前記流路を有さない、請求項１に記載の流体クロマトグラフ用流路切替バルブ。 The flow path switching valve for a fluid chromatograph according to claim 1, wherein the housing top does not have the flow path.
- 前記ハウジングは前記ハウジングトップが先端に装着される筒状のハウジングボディを有し、
前記ステータは、その周縁部が前記ハウジングボディと前記ハウジングトップとの間に挟み込まれることによって前記ハウジングに保持されている、請求項１又は２に記載の流体クロマトグラフ用流路切替バルブ。 The housing has a cylindrical housing body to which the housing top is attached at a tip,
3. The flow path switching valve for a fluid chromatograph according to claim 1, wherein the stator is held by the housing by sandwiching a peripheral portion between the housing body and the housing top. 4. - 前記ハウジングボディは前記ステータの周縁部を支持する面に突起を有し、
前記ステータには前記突起が嵌め込まれる穴が形成されており、
前記ステータの前記穴に前記ハウジングボディの前記突起が嵌め込まれることによって、前記ロータの回転平面内方向における前記ステータの位置が固定されるように構成されている、請求項３に記載の流体クロマトグラフ用流路切替バルブ。 The housing body has a projection on a surface supporting a peripheral portion of the stator,
A hole into which the projection is fitted is formed in the stator,
4. The fluid chromatograph according to claim 3, wherein a position of the stator in a rotation plane direction of the rotor is fixed by fitting the protrusion of the housing body into the hole of the stator. 5. Flow switching valve. - 前記ロータは、ステンレス又はチタンからなる円板状の母材の表面にダイヤモンドライクカーボン膜が形成されたものである、請求項１から４のいずれか一項に記載の流体クロマトグラフ用流路切替バルブ。 5. The fluid chromatograph flow path switching according to claim 1, wherein the rotor is a disk-like base material made of stainless steel or titanium and a diamond-like carbon film formed on a surface thereof. 6. valve.
- 前記ステータは、ポリエーテルエーテルケトンで構成されている、請求項１から５のいずれか一項に記載の流体クロマトグラフ用流路切替バルブ。 The flow path switching valve for a fluid chromatograph according to any one of claims 1 to 5, wherein the stator is made of polyetheretherketone.
- 前記ハウジングトップは、金属材料で構成されている、請求項１から６のいずれか一項に記載の流体クロマトグラフ用流路切替バルブ。 The flow path switching valve for a fluid chromatograph according to any one of claims 1 to 6, wherein the housing top is made of a metal material.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2018/030992 WO2020039521A1 (en) | 2018-08-22 | 2018-08-22 | Flow channel switching valve |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2018/030992 WO2020039521A1 (en) | 2018-08-22 | 2018-08-22 | Flow channel switching valve |
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| JP2005009994A (en) * | 2003-06-18 | 2005-01-13 | Oji Paper Co Ltd | Liquid sample injection device |
| JP2014507646A (en) * | 2011-01-12 | 2014-03-27 | ディオネクス ゾフトロン ゲーエムベーハー | High pressure switching valve for high performance liquid chromatography |
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