WO2014141358A1 - 流路切換バルブ - Google Patents
流路切換バルブ Download PDFInfo
- Publication number
- WO2014141358A1 WO2014141358A1 PCT/JP2013/056574 JP2013056574W WO2014141358A1 WO 2014141358 A1 WO2014141358 A1 WO 2014141358A1 JP 2013056574 W JP2013056574 W JP 2013056574W WO 2014141358 A1 WO2014141358 A1 WO 2014141358A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- rotor
- flow path
- stator
- housing
- switching valve
- Prior art date
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Classifications
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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
- G01N30/28—Control of physical parameters of the fluid carrier
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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
- F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
- F16K3/02—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with flat sealing faces; Packings therefor
- F16K3/04—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with flat sealing faces; Packings therefor with pivoted closure members
- F16K3/06—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with flat sealing faces; Packings therefor with pivoted closure members in the form of closure plates arranged between supply and discharge passages
- F16K3/08—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with flat sealing faces; Packings therefor with pivoted closure members in the form of closure plates arranged between supply and discharge passages with circular plates rotatable around their centres
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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
- F16K11/072—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 pivoted closure members
- F16K11/074—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 pivoted closure members with flat sealing faces
- F16K11/0743—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 pivoted closure members with flat sealing faces with both the supply and the discharge passages being on one side of the closure plates
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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
- F16K11/072—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 pivoted closure members
- F16K11/074—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 pivoted closure members with flat sealing faces
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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
- F16K25/00—Details relating to contact between valve members and seat
- F16K25/005—Particular materials for seats or closure elements
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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
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/04—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor
- F16K31/041—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor for rotating valves
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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
- 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
- G01N35/1095—Devices for transferring samples or any liquids to, in, or from, the analysis apparatus, e.g. suction devices, injection devices for supplying the samples to flow-through analysers
- G01N35/1097—Devices for transferring samples or any liquids to, in, or from, the analysis apparatus, e.g. suction devices, injection devices for supplying the samples to flow-through analysers characterised by the valves
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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
- G01N2030/022—Column chromatography characterised by the kind of separation mechanism
- G01N2030/027—Liquid chromatography
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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
- G01N30/24—Automatic injection systems
Definitions
- the present invention relates to a flow path switching valve used in an autosampler that introduces a sample into an analysis flow path of a liquid chromatograph, for example.
- the sample loop is placed upstream of the separation column in the analysis flow path by switching the flow path switching valve. By connecting, the sample of the sample loop is transferred to the separation column side by the mobile phase flowing through the analysis flow path.
- a rotary switching valve As a flow path switching valve used for a liquid chromatograph, a rotary switching valve is generally used. A rotary type switching valve switches a flow path to be connected by rotating a rotor (rotor) (see, for example, Patent Document 1).
- the rotary switching valve is provided with a plurality of connection ports for connecting the flow pipes in the upper part of the housing, and a rotor and a stator (stator) are accommodated inside the housing.
- the rotor and the stator are in contact with each other in a plane that is liquid-tight, and the stator is fixed by pins or the like so as not to rotate toward the housing.
- a through hole is provided at a position corresponding to the hole at the end of the flow path leading to the connection port of the stator housing.
- a groove that communicates between the ends of the through holes of the stator is cut, and the position of the groove is changed when the rotor is driven to rotate while sliding on the stator, and the connection port The connection between is switched.
- a resin such as PEEK (polyetheretherketone) or polyimide is used as the material of the rotor, and ceramics or the like is used as the material of the stator.
- the stator may be integrated with the housing. In such a case, the surface of the stator may be coated with DLC (diamond-like carbon) having excellent chemical resistance and slidability. Many.
- the sliding surface of the rotor (resin) softer than the stator (ceramics or DLC) will wear, causing problems such as an increase in the rotational torque of the rotor and leakage of the mobile phase. In some cases, the mobile phase remains in the worn part, causing a problem of cross contamination.
- the rotor in order to prevent liquid leakage on the sliding surfaces of the rotor and the stator, the rotor is pressed against the stator with a strong force, so that the rotor rotates in that state, and the material of the rotor is resin. In some cases, the surface of the rotor is scraped off due to friction caused by rotation, and shavings are generated, causing deterioration of the analytical column connected to the rear stage side of the flow path switching valve. In addition, when the rotor is made of resin, the rotor is pressed against the stator with a strong force, so that the rotor groove is deformed, and it is difficult for liquid to flow through the rotor groove.
- the material of the rotor is made of a hard material such as ceramics, generation of shavings from the rotor surface can be reduced and deformation of the rotor groove can be prevented.
- an object of the present invention is to reduce the wear of the rotor and the stator without impairing the slidability and liquid tightness of the sliding surfaces of the rotor and the stator.
- the flow path switching valve has a housing having a plurality of connection ports for connecting flow path piping to the outer surface and having a space inside, and a connection port provided in the housing and constituting a part of the inner wall surface of the housing.
- a stator having a port end portion arrangement surface in which a plurality of holes leading to is disposed, and the stator is arranged in the housing and is in contact with the port end portion arrangement surface of the stator in a liquid-tight manner and arranged on the port end portion arrangement surface.
- the flow path switching valve of the present invention since at least one of the port end arrangement surface and the flow path connection surface is coated with a resin film having chemical resistance and slidability, it is provided between the stator and the rotor. Slidability is improved and wear of the stator or rotor is reduced. Further, since the resin film is interposed between the stator and the rotor, the elasticity of the resin film absorbs the stress applied to the rotor, and the deformation of the rotor groove is suppressed.
- the inventor made one of the rotor and the stator made of resin and coated the other contact surface with a chromium nitride film, thereby reducing the friction coefficient between the rotor and the stator. And it is proposed to suppress the wear of the stator.
- the present invention is an improvement of this, and the present invention can obtain the effect of suppressing the deformation of the groove of the rotor.
- the resin film when the resin film is formed only on one of the port end portion arrangement surface and the flow path connection surface, the other is coated with a film made of diamond-like carbon. It is preferable. Since diamond-like carbon is excellent in wear resistance and slidability, the slidability between the stator and the rotor is improved, and the wear of the stator and the rotor can be reduced.
- stator is also made of a hard member
- a resin film is formed on both the port end portion arrangement surface of the stator and the flow path connection surface of the rotor.
- the flatness of the surface of the resin film formed on the port end arrangement surface or the flow path connection surface is preferably 10 ⁇ m or less. By doing so, the liquid-tightness between the port edge part arrangement
- the flatness is 10 ⁇ m or less” means that the maximum value of the unevenness drop (the difference between the highest and the lowest) in the same plane is 10 ⁇ m or less.
- polyether ether ketone resin or polyamide resin can be mentioned.
- These resins may contain a fluororesin such as PTFE (polytetrafluoroethylene) or PFA (tetrafluoroethylene / perfluoroalkyl vinyl ether copolymer), graphite or carbon.
- PTFE polytetrafluoroethylene
- PFA tetrafluoroethylene / perfluoroalkyl vinyl ether copolymer
- graphite or carbon By including such a material, the friction coefficient on the surface of the resin film is further reduced, the slidability between the stator and the rotor is improved, and the wear of the stator and the rotor can be further reduced.
- the rotor may be composed of a hard member having a hardness higher than that of the resin. Then, deformation of the rotor due to the rotor being pressed against the stator with a strong force can be suppressed.
- ceramics such as alumina and zirconia can be cited in addition to metals such as stainless steel and titanium.
- the rotor 8 as a rotor and the stator 14 as a stator are accommodated in the internal space of the housing 2.
- the housing 2 has a circular planar shape and includes a plurality of connection ports 22 and 24 that connect the flow path pipes to the upper outer surface.
- a hole 3 is provided in the center of the lower surface of the housing 2, and a drive shaft 6 that forms a part of a rotor drive unit that rotationally drives the rotor 8 passes through the hole 3.
- the housing 2 includes a housing body 2a and a housing top 2b.
- the housing body 2a is cylindrical and has a hole 3 in the center of the seating surface. With the opening of the housing body 2a facing upward, a disc-shaped housing top 2b is placed on the opening.
- the housing body 2a forms the base of the housing 2, and the housing top 2b is detachably attached to the housing body 2a by bolts 5.
- the bolt 5 is fastened so as to reach the housing body 2a from the upper surface side of the housing top 2b.
- the housing top 2b is provided with a through hole through which the bolt 5 passes, and the housing body 2a is provided with a screw hole for fastening the bolt 5.
- the central portion 4 of the lower surface of the housing top 2b which is the inner wall surface of the housing 2 is a plane in which holes at the ends of the flow paths 23 and 25 leading to the connection ports 22 and 24 are arranged, and the periphery is surrounded by a ring-shaped recess 34. It is a broken circular plane area.
- the stator 14 is in contact with the lower surface central portion 4 of the housing top 2b via the packing 16.
- the stator 14 and the packing 16 are circular members having a planar shape larger than that of the lower surface central portion 4, and the central portion of the packing 16 is in contact with the lower surface central portion 4 of the housing top 2 b while maintaining liquid tightness.
- the recess 34 is provided around the lower surface central portion 4 of the housing top 2b, the portion where the housing top 2b contacts the packing 16 is limited to the flow path connecting portion 4, and the flow path connecting portion 4 and the center of the packing 16 are located.
- the surface pressure applied to the part is increased to improve the liquid tightness in this part.
- the stator 14 and the packing 16 are provided with through holes corresponding to the holes at the ends of the flow paths 23 and 25 arranged in the lower center portion 4 of the housing top 2b.
- the stator 14 and the packing 16 are fixed to the housing top 2b side by the stator fixing pin 20 in a state where these through holes are positioned in the end holes of the flow paths 23 and 25 of the housing top 2b.
- the housing top 2b is provided with a hole for inserting the stator fixing pin 20, and the stator 14 and the packing 16 are provided with through holes through which the stator fixing pin 20 passes.
- the rotor 8 is rotated in the housing 2 by the rotor drive shaft 6.
- the rotor drive shaft 6 is disposed in a direction perpendicular to the plane of the lower surface central portion 4 of the housing top 2b, and a rotor holding portion 6a is provided at the tip.
- the front end surface of the rotor holding portion 6a is a plane parallel to the lower surface central portion 4 of the housing top 2b, and the rotor 8 is held on the front end surface of the rotor holding portion 6a.
- the upper surface (flow path connection surface) of the rotor 8 is in contact with the lower surface (port end arrangement surface) of the stator 14.
- the base end portion of the rotor drive shaft 6 is drawn out of the housing 2 through the hole 3 of the housing 2 and rotated around its axis by a rotation mechanism (not shown) such as a motor outside the housing 2. .
- the rotor holding portion 6 a and the rotor 8 are fixed in the rotation direction by the rotor fixing pin 10, and the rotor 8 is rotated by the rotation of the rotor drive shaft 6.
- the rotor 8 is provided with a through hole for allowing the rotor fixing pin 10 to pass therethrough, and the rotor holding portion 6a is provided with a hole for inserting the rotor fixing pin 10 therein.
- the rotor drive shaft 6 has a rotor holding portion 6a at the distal end having a larger outer diameter than the shaft portion on the proximal end side.
- a compressed spring 7 is inserted between the bottom of the housing body 2a and the rotor holding portion 6a, and the rotor drive shaft 6 is urged toward the housing top 2b by the spring 7. As a result, the rotor 8 is pressed against the stator 14.
- On the surface of the rotor 8 on the stator 14 side there is provided a groove 12 that forms a flow path that connects any of the flow paths 23 and 25 of the housing top 2b. The position of the groove 12 is changed.
- the rotor 8 is made of a hard member having chemical resistance such as stainless steel or titanium, and the surface on the stator 14 side is coated with a resin film 30 having excellent chemical resistance and sliding property.
- the resin film 30 is formed, for example, by coating PEEK resin or polyimide resin on the surface of the rotor 8 with a thickness of about 100 ⁇ m.
- the PEEK resin or polyimide resin constituting the resin film 30 may contain about 10 to 30% of fluorine resin such as PTFE or PFA, graphite or carbon.
- the resin film 30 is formed by spraying powder and liquefied PEEK resin on the surface on the side of the stator 14 and heating it so that the PEEK is adhered and cured.
- vicote coating provided by victrex is a typical method.
- the coating of the resin film 30 on the surface of the rotor 8 in order to improve the adhesion of the resin to the surface of the rotor 8, fine irregularities are formed on the surface of the rotor 8 by blasting before the resin coating, and the resin is coated. After that, it is preferable to polish the surface of the rotor 8 so that the flatness is 10 ⁇ m or less. By setting the flatness of the surface of the rotor 8 to 10 ⁇ m or less by the polishing process, the liquid tightness on the sliding surface with the stator 14 can be improved.
- the stator 14 is made of a material having chemical resistance such as ceramics such as alumina and zirconia, PEEK resin, polyimide resin, in addition to metals such as stainless steel and titanium.
- the surface thereof is made of, for example, diamond abrasive grains (particle diameter of 1 to 3 ⁇ m) in order to improve the slidability and liquid tightness of the sliding surface with the rotor 8. It is preferable that it is mirror-finished by a polishing process. Furthermore, the slidability of the sliding surface with the rotor 8 can be further improved by applying a DLC coating having a thickness of, for example, about 2 ⁇ m to the mirror-finished surface of the stator 14.
- the surface of the rotor 8 on the stator 14 side is coated with the resin film 30, but as shown in FIG. 2, the surface of the stator 14 on the rotor 8 side is covered with the resin film 32. It may be coated.
- the resin film 32 is formed by coating the surface of the stator 14 with PEEK resin or polyimide resin with a thickness of about 100 ⁇ m.
- the stator 14 is composed of a hard member having chemical resistance such as stainless steel or titanium.
- the flatness is preferably 10 ⁇ m or less.
- the rotor 8 is made of a material having chemical resistance such as ceramics such as alumina or zirconia, PEEK resin, polyimide resin, in addition to metals such as stainless steel and titanium.
- the surface thereof is made of, for example, diamond abrasive grains (particle diameter of 1 to 3 ⁇ m) in order to improve the slidability and liquid tightness of the sliding surface with the stator 14. It is preferable that it is mirror-finished by a polishing process.
- the slidability of the sliding surface with the stator 14 can be further enhanced by applying a DLC coating having a thickness of, for example, about 2 ⁇ m to the mirror-finished surface of the rotor 8.
- the sliding surfaces of the rotor 8 and the stator 14 may be coated with resin films 30 and 32, respectively.
- both the rotor 8 and the stator 14 are made of stainless steel, titanium, or the like.
- the stator 14 is provided separately from the housing 2, but the present invention is not limited to such a configuration, and the stator is integrated with the housing. Can be applied.
- the flow path length inside the flow path switching valve is shortened, and the dead volume in the flow path switching valve is reduced.
- the dead volume in the flow path switching valve for example, when this flow path switching valve is used in a liquid chromatograph, diffusion of sample components in the flow path switching valve can be suppressed, and detection sensitivity is improved. Can be achieved.
- the housing 40 is constituted by a housing body 40a and a housing top 40b as in the embodiment described with reference to FIGS. 1 to 3, and the housing top 40b is placed on the housing body 40a and fixed by a bolt 48. Yes.
- the connection ports 42 and 44 are provided in the housing top 40 b, and the end portions of the flow paths 43 and 45 communicating with the connection ports 42 and 44 reach the lower surface central portion 46 of the housing top 40 b that forms the inner wall surface of the housing 40.
- the lower surface central portion 46 of the housing top 40b forms a sliding surface (port end arrangement surface) with the rotor 8, and a stator that slides with the rotor 8 is integrated with the housing top 40b.
- the base end portion of the rotor drive shaft 6 is drawn out of the housing 40 through a hole 41 provided in the bottom portion of the housing body 40b, and the shaft core is rotated by a rotation mechanism (not shown) such as a motor outside the housing 40. Can be rotated around.
- the rotor 8 rotated by the rotor drive shaft 6 is composed of a hard member having chemical resistance such as stainless steel and titanium, and the surface on the stator 14 side is coated with a resin film 30 having excellent chemical resistance and sliding property. ing.
- the resin film 30 is the same as the resin film 30 described in the embodiment of FIGS.
- the material of the housing top 40b is a metal such as stainless steel or titanium, or a ceramic such as alumina or zirconia. Since the lower surface central portion 46 of the housing top 40b is a sliding surface with the rotor 8, it is preferable that the surface thereof is mirror-finished by a polishing process using, for example, diamond abrasive grains (particle diameter: 1 to 3 ⁇ m). Furthermore, the slidability with the rotor 8 can be further enhanced by applying a DLC coating having a thickness of, for example, about 2 ⁇ m to the surface of the lower surface central portion 46 of the mirror-finished housing top 40b.
- the lower surface of the housing top 40b may be coated with a resin film 50 as shown in FIG. Similar to the resin film 30, the resin film 50 is formed by coating PEEK resin or polyimide resin on the lower surface of the housing top 40 b with a thickness of about 100 ⁇ m.
- the housing top 40b is made of, for example, stainless steel or titanium.
- the resin film 50 is coated on the lower surface of the housing top 40b, fine irregularities are formed on the lower surface of the housing top 40b (excluding the contact portion with the housing body 40a) by blasting, and after coating the resin, It is preferable that the surface is polished to have a flatness of 10 ⁇ m or less.
- the rotor 8 is made of a material having chemical resistance such as ceramics such as alumina or zirconia, PEEK resin, polyimide resin, in addition to metals such as stainless steel and titanium.
- the surface thereof is made of, for example, diamond abrasive grains (particle diameter of 1 to 3 ⁇ m) in order to improve the slidability and liquid tightness of the sliding surface with the housing top 40b. It is preferable that it is mirror-finished by a polishing process.
- the slidability of the sliding surface with the stator 14 can be further enhanced by applying a DLC coating having a thickness of, for example, about 2 ⁇ m to the mirror-finished surface of the rotor 8.
- both the rotor 8 and the housing top 40b are made of stainless steel, titanium, or the like.
Abstract
Description
ここで、「平坦度が10μm以下である」とは、同一平面内における凹凸の落差の最大値(最も高いところと最も低いところの差)が10μm以下であることを意味する。
2a,40a ハウジングボディ
2b,40b ハウジングトップ
3,41 ロータ駆動軸用の貫通穴
4,46 ハウジングトップの下面中央部(ポート端部配置面)
5,48 ボルト
6 ロータ駆動軸
6a ロータ保持部
7 バネ
8 ロータ
10 ロータ固定ピン
12 溝
14 ステータ
16 パッキン
20 ステータ固定ピン
22,24,42,44 接続ポート
23,25,43,45 流路
30,32,50 樹脂膜
34 窪み
Claims (7)
- 外面に流路配管を接続する複数の接続ポートを有するとともに内部に空間を有するハウジングと、
前記ハウジング内に設けられ、前記ハウジングの内壁面の一部をなし前記接続ポートへ通じる複数の穴が配置されているポート端部配置面を有するステータと、
前記ハウジング内に配置され、前記ステータの前記ポート端部配置面と液密を保って接し前記ポート端部配置面に配置されている前記穴の間を選択的に接続する溝が形成されている流路接続面を有するロータと、
前記ロータを回転させるロータ駆動部と、を備え、
前記ポート端部配置面と前記流路接続面の少なくともいずれか一方が耐薬品性及び摺動性を有する樹脂膜により被膜されている流路切換バルブ。 - 前記ポート端部配置面と前記流路接続面のいずれか一方のみが前記樹脂膜により被膜されており、他方はダイヤモンドライクカーボンにより被膜されている請求項1に記載の流路切換バルブ。
- 前記ポート端部配置面と前記流路接続面の両方が前記樹脂膜により被膜されている請求項1に記載の流路切換バルブ。
- 前記樹脂膜の表面の平坦度は10μm以下である請求項1から3のいずれか一項に記載の流路切換バルブ。
- 前記樹脂膜の主成分はポリエーテルエーテルケトン樹脂又はポリアミド樹脂である請求項1から4のいずれか一項に記載の流路切換バルブ。
- 前記ロータは樹脂よりも高い硬度を有する硬質部材により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路切換バルブ。
- 前記硬質部材の材質は金属又はセラミックスである請求項6に記載の流路切換バルブ。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US14/774,456 US20160025690A1 (en) | 2013-03-11 | 2013-03-11 | Flow path switching valve |
JP2015505101A JP5999252B2 (ja) | 2013-03-11 | 2013-03-11 | 流路切換バルブ |
CN201380074270.0A CN105026810A (zh) | 2013-03-11 | 2013-03-11 | 流路切换阀 |
PCT/JP2013/056574 WO2014141358A1 (ja) | 2013-03-11 | 2013-03-11 | 流路切換バルブ |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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PCT/JP2013/056574 WO2014141358A1 (ja) | 2013-03-11 | 2013-03-11 | 流路切換バルブ |
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US (1) | US20160025690A1 (ja) |
JP (1) | JP5999252B2 (ja) |
CN (1) | CN105026810A (ja) |
WO (1) | WO2014141358A1 (ja) |
Cited By (2)
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CN109237075A (zh) * | 2018-09-29 | 2019-01-18 | 成都凯天电子股份有限公司 | 多通道旋转切换阀 |
CN109406594A (zh) * | 2018-11-16 | 2019-03-01 | 苏州赛谱仪器有限公司 | 能够进行流路切换的pH流通池装置 |
Families Citing this family (3)
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ITUA20161724A1 (it) * | 2016-03-16 | 2017-09-16 | Seko Spa | Dispositivo selettore |
DE102017101629A1 (de) * | 2017-01-27 | 2018-08-02 | Agilent Technologies, Inc. - A Delaware Corporation - | Fluidventil mit goldhaltiger und/oder platinhaltiger Beschichtung |
WO2019186690A1 (ja) * | 2018-03-27 | 2019-10-03 | 株式会社島津製作所 | 水質分析計用マルチポートバルブ |
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CN109406594A (zh) * | 2018-11-16 | 2019-03-01 | 苏州赛谱仪器有限公司 | 能够进行流路切换的pH流通池装置 |
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Also Published As
Publication number | Publication date |
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CN105026810A (zh) | 2015-11-04 |
JPWO2014141358A1 (ja) | 2017-02-16 |
JP5999252B2 (ja) | 2016-09-28 |
US20160025690A1 (en) | 2016-01-28 |
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