WO2017022412A1 - 分注装置 - Google Patents
分注装置 Download PDFInfo
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- WO2017022412A1 WO2017022412A1 PCT/JP2016/070360 JP2016070360W WO2017022412A1 WO 2017022412 A1 WO2017022412 A1 WO 2017022412A1 JP 2016070360 W JP2016070360 W JP 2016070360W WO 2017022412 A1 WO2017022412 A1 WO 2017022412A1
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- WIPO (PCT)
- Prior art keywords
- fluid control
- control valve
- flow path
- reagent
- dispensing
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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
- G01N35/1002—Reagent dispensers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
- B01L3/00—Containers or dishes for laboratory use, e.g. laboratory glassware; Droppers
- B01L3/02—Burettes; Pipettes
- B01L3/0241—Drop counters; Drop formers
- B01L3/0265—Drop counters; Drop formers using valves to interrupt or meter fluid flow, e.g. using solenoids or metering valves
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
- B01L3/00—Containers or dishes for laboratory use, e.g. laboratory glassware; Droppers
- B01L3/52—Containers specially adapted for storing or dispensing a reagent
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
- B01L3/00—Containers or dishes for laboratory use, e.g. laboratory glassware; Droppers
- B01L3/56—Labware specially adapted for transferring fluids
- B01L3/567—Valves, taps or stop-cocks
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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
- F16K7/00—Diaphragm valves or cut-off apparatus, e.g. with a member deformed, but not moved bodily, to close the passage ; Pinch valves
- F16K7/12—Diaphragm valves or cut-off apparatus, e.g. with a member deformed, but not moved bodily, to close the passage ; Pinch valves with flat, dished, or bowl-shaped diaphragm
- F16K7/14—Diaphragm valves or cut-off apparatus, e.g. with a member deformed, but not moved bodily, to close the passage ; Pinch valves with flat, dished, or bowl-shaped diaphragm arranged to be deformed against a flat seat
-
- 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
-
- 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
- G01N35/1009—Characterised by arrangements for controlling the aspiration or dispense of liquids
- G01N35/1016—Control of the volume dispensed or introduced
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
- B01L2200/00—Solutions for specific problems relating to chemical or physical laboratory apparatus
- B01L2200/06—Fluid handling related problems
- B01L2200/0684—Venting, avoiding backpressure, avoid gas bubbles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
- B01L2200/00—Solutions for specific problems relating to chemical or physical laboratory apparatus
- B01L2200/16—Reagents, handling or storing thereof
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
- B01L2400/00—Moving or stopping fluids
- B01L2400/04—Moving fluids with specific forces or mechanical means
- B01L2400/0475—Moving fluids with specific forces or mechanical means specific mechanical means and fluid pressure
- B01L2400/0478—Moving fluids with specific forces or mechanical means specific mechanical means and fluid pressure pistons
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
- B01L2400/00—Moving or stopping fluids
- B01L2400/06—Valves, specific forms thereof
- B01L2400/0633—Valves, specific forms thereof with moving parts
- B01L2400/0638—Valves, specific forms thereof with moving parts membrane valves, flap valves
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
- B01L2400/00—Moving or stopping fluids
- B01L2400/06—Valves, specific forms thereof
- B01L2400/0633—Valves, specific forms thereof with moving parts
- B01L2400/0666—Solenoid valves
-
- 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
- G01N35/1009—Characterised by arrangements for controlling the aspiration or dispense of liquids
- G01N35/1016—Control of the volume dispensed or introduced
- G01N2035/1018—Detecting inhomogeneities, e.g. foam, bubbles, clots
Definitions
- the present invention relates to a high-precision micro-dispensing technique by removing bubbles in a fluid control valve in a dispensing mechanism such as an automatic analyzer.
- the dispensing device is often provided with a valve for controlling the direction of the fluid between the nozzle that discharges the liquid and the syringe pump, and this fluid control valve enables a complicated flow path configuration.
- bubbles may adhere to the inner wall of the fluid control that contains the liquid or the uneven portion of the connection of the flow path during the dispensing operation in which the liquid is repeatedly sucked. If a minute amount of liquid is dispensed with bubbles attached, the internal pressure in the flow path fluctuates due to changes in the volume of the bubbles, causing variations in the amount of liquid to be dispensed, resulting in a decrease in dispensing accuracy. It was.
- the present invention can reduce the gas remaining in the fluid control valve very easily by devising the fixing method of the fluid control valve, and can realize high precision micro-dispensing accuracy by removing the gas easily.
- An object is to provide an ordering device.
- This invention relates to the arrangement of a fluid control valve that opens and closes a flow path for sucking or discharging a trace amount of liquid in an automatic analyzer, and a flow path structure connected to the fluid control valve, a center, a fixing sheet metal, and a syringe pump operation.
- the present invention solves this problem by adopting an apparatus configuration having the following features.
- the present invention provides a discharge nozzle, a reagent bottle in which a reagent is stored, and a discharge pipe arranged to connect the discharge nozzle, forming a flow path for the reagent, the reagent bottle, and the discharge nozzle.
- a fluid control valve disposed on a path of the connecting liquid supply pipe, and the fluid control valve is provided in the middle of the flow path of the reagent having a liquid introduction port and a drain port
- a diaphragm valve, and the fluid control valve is disposed in a direction in which the diaphragm valve is disposed below the flow path of the fluid control valve.
- the fluid control valve arrangement direction is rotated by 180 ° and is arranged obliquely so that the drive direction of the fluid control valve is positioned in an oblique direction with respect to the flow path and the gravity line direction.
- it is composed of a fluid control valve, liquid feed pump, piping, discharge port, liquid supply source and liquid, and is disposed with an inclination so that the drain port of the fluid control valve is higher than the liquid introduction port,
- the valve chamber side surface of the diaphragm of the fluid control valve faces upward.
- a system diagram of the dispensing mechanism of the biochemical automatic analyzer is shown.
- the attachment position of the bubbles when the diaphragm is arranged at the upper part is shown.
- the schematic diagram of the cross section of the diaphragm type two-way solenoid valve the attachment position of the bubbles when the diaphragm is disposed in the lower part is shown.
- a schematic diagram of a cross section when a diaphragm type two-way solenoid valve is disposed obliquely a state in which the diaphragm is disposed at the lower portion and fluid flows from IN to OUT and from bottom to top is shown.
- the figure explaining the definition of the attachment angle of a fluid control valve is shown.
- positioning of each structure are shown.
- the schematic diagram of a diaphragm type two-way solenoid valve cross section is shown.
- the schematic diagram at the time of valve opening of a diaphragm type two-way solenoid valve (normally closed) is shown.
- the schematic diagram at the time of valve closing of a diaphragm type two-way solenoid valve (normally closed) is shown.
- movement of the fluid control valve fixed to the movable sheet metal is shown.
- the figure at the time of the maintenance of the fluid control valve fixed to the movable sheet metal is shown.
- movement of the fluid control valve using an attachment sheet metal is shown.
- positioning at the time of the maintenance of the fluid control valve using a mounting sheet metal is shown.
- a bubble drop comparison table with an inclination angle ⁇ z is shown.
- a bubble drop comparison table with an inclination angle ⁇ r is shown.
- the biochemical automatic analyzer has a dispensing mechanism as shown in FIG.
- the dispensing mechanism includes a discharge nozzle 100, a syringe pump 101, a fluid control valve (discharge nozzle side) 102, a fluid control valve (reagent bottle side) 103, and a liquid feeding pipe 104, and is stored in the reagent bottle 105. Dispense the retained reagent into the reaction vessel.
- the liquid feeding tube 104 is disposed so as to connect the reagent bottle and the discharge nozzle, and forms a reagent flow path.
- the fluid control valve (discharge nozzle side) 102 and the fluid control valve (reagent bottle side) 103 are disposed on the path of the liquid feeding pipe 104 that connects the reagent bottle and the discharge nozzle.
- the components of the dispensing mechanism are preferably the following members, but the configuration of the present invention is not limited to the following members.
- the trace amount is defined as 0.2 ml or less, and the effect on dispensing in the range of 4 ul to 120 ul will be described.
- the discharge nozzle 100 be made of a metal such as stainless steel with an inner diameter of about 0.5 mm or less so that the direction and speed of the fluid at the time of discharging the solution are uniform, and the solution is further drained.
- the syringe pump 101 preferably has a cylinder made of an acrylic resin and a plunger made of a fluorinated polymer, and is preferably driven to discharge and suck by a ball screw and a stepping motor.
- the fluid control valve (discharge nozzle side) 102 and the fluid control valve (reagent bottle side) 103 have a high opening / closing speed and a small pumping amount when the valve is closed, it is desirable to use a diaphragm type electromagnetic valve.
- the above configuration is generally distributed as a commercial product, and has an advantage in terms of easy availability and price.
- the liquid feeding pipe 104 is desirably made of a fluoropolymer having low wettability as a material in order to reduce pressure loss due to flow path resistance, and further has an inner diameter of 1 mm or less in order to reduce dead volume and increase liquid feeding efficiency. It is desirable that the reagent bottle 105 be opened and installed under atmospheric pressure so that it can be easily replaced.
- the discharge nozzle 100 is connected to a fluid control valve (discharge nozzle side) 102 by a liquid feed pipe 104, and further connected to a syringe pump 101 and a fluid control valve (reagent bottle side) 103 through a branch 106.
- the fluid control valve (reagent bottle side) 103 is connected to the reagent bottle through the liquid feeding pipe 104.
- the suction operation of the syringe pump 101 ends, then the fluid control valve (reagent bottle side) 103 is closed, and then the fluid control valve (discharge nozzle side) 102 is opened.
- the syringe pump 101 operates in the discharge direction, and a predetermined amount of reagent is discharged from the discharge nozzle 100. Accordingly, liquid feeding is always performed from the reagent bottle 105 toward the discharge nozzle 100.
- a liquid feed tube having an inner diameter of 1 mm and a length of 1 m, it corresponds to an amount of bubbles of about 4 ul at atmospheric pressure. .
- oxygen is not saturated and does not elute 100%, so the amount of elution of bubbles is less than 1 ul.
- 1 to 3 bubbles with a diameter of about 1 mm were mixed in the liquid feeding tube at a frequency of about once every 20 times, and about 1 for 120 ul of quantitative dispensing. A phenomenon in which a discharge amount of up to 5 ul was insufficient was confirmed.
- FIG. 2 shows the structure of the fluid control valve.
- the fluid control valve in FIG. 2 includes a liquid inlet (IN in FIG. 2), a drain outlet (OUT in FIG. 2), a flow path divided by a valve chamber, and a disk-shaped diaphragm.
- the valve chamber refers to a space having one side surface of the diaphragm of FIG.
- the valve chamber has a cylindrical shape, and the diaphragm can reciprocate in the cylinder axis direction within the valve chamber.
- the liquid introduction port and the liquid discharge port are connected by a tube-shaped flow path, and the flow path from the liquid introduction port passes through the valve chamber inlet provided in the central axis of the valve chamber (center axis of the diaphragm). Connected to the valve chamber. And the flow path is connected to the drainage port from the outlet of the valve chamber provided at the end of the valve chamber. From the liquid introduction port to the drainage port is a flow path for the reagent in the fluid control valve, and the diaphragm is disposed in the middle of the flow path for the reagent.
- the central portion of the diaphragm has a thickness, and when the flow is interrupted, the diaphragm operates in the direction of the liquid introduction port and closes the flow passage by closely contacting the connection portion with the liquid introduction port.
- the inlet side of the flow path is IN and the outlet side is OUT.
- the eluting fine bubbles are integrated in the valve to become bubbles of about 1 mm, and when they become large to some extent, they are released along the flow. Further, the internal volume of the valve chamber of the fluid control valve used in this study is about 30 uL. When the liquid that has passed through the 1.5 mm-diameter liquid feeding tube enters the valve chamber with a large volume, the pressure is reduced, and the pressure during reagent aspiration becomes unstable due to the expansion of the bubbles.
- the member characteristics of the diaphragm 108 can be cited as a cause of bubbles growing in the fluid control valve.
- the diaphragm 108 used in this experiment is a molded product of polytetrafluoroethylene (PTFE).
- PTFE polytetrafluoroethylene
- PTFE has very strong water repellency, so it is excellent as a sealing material for the coil portion of the solenoid valve, and also has high flexibility and durability. Further, strong water repellency can reduce pressure loss and prevent contamination by proteins. On the other hand, it is considered that bubbles are likely to adhere due to strong water repellency and promote the growth of bubbles.
- the two-way diaphragm type solenoid valve used in this experiment is desirable.
- the head, seal, and diaphragm member of the fluid control valve are PTFE, FKM, NBR, EPR, EPDM, PEEK, PPS, PSU, SUS304, SUS316, PFA, FFKM, FKMPC, TFE, POM, HPVC, ALM203 , FPA, silicon rubber, or a combination of two or more.
- the dead volume in the fluid control valve chamber is 50 uL or less. The inventors have intensively studied and studied the following measures for preventing bubble formation and accumulation in the solenoid valve.
- the fluid control valve so that the side facing the flow path of the diaphragm 108 faces vertically upward as another measure for preventing bubble generation and accumulation.
- the fluid control valve is disposed in such an orientation that the diaphragm is disposed under the flow path of the reagent in the fluid control valve.
- “below” the flow path is not limited to the vertically lower side, but means to allow a certain angle range, and includes at least the angle range described below.
- the fluid control valve obliquely so that the water introduction side (IN) of the fluid control valve is on the lower side and the drain port side (OUT) is on the upper side.
- the reagent is fed from the lower side to the upper side.
- the fluid control valve is disposed in such a direction that the liquid introduction port of the fluid control valve is positioned lower than the drainage port.
- “low position” means that the height in the vertical direction is low.
- the diaphragm 108 is disposed so that the side facing the flow path faces upward. With this arrangement, even if bubbles are generated, they immediately rise to the drain outlet and are discharged.
- changing the direction of the first diaphragm 108 significantly shortened the time taken to remove the bubbles.
- the bubble removal time can be further shortened, and accumulation of large bubbles can be prevented.
- the angle of the fluid control valve will be described with reference to FIG.
- the direction from the liquid introduction port 204 (IN side) to the liquid discharge port 203 (OUT side) is taken as the x axis.
- the central axis P of the solenoid valve is perpendicular to the x-axis. This direction is taken as the z-axis.
- P 'axis Direction of central axis of solenoid valve z-axis: vertical direction
- ⁇ r rotation angle of the straight line connecting IN and OUT of the solenoid valve with respect to the x-axis
- ⁇ z defined as an angle formed by the P ′ axis and the horizontal plane.
- the present embodiment is particularly effective when used in combination with the arrangement of the fluid control valve of the first embodiment.
- description of the same parts as those in the first embodiment will be omitted.
- the bubbles mixed in the solenoid valve may be derived from dissolved gas or the bubbles remaining at the end of the liquid supply pipe when the reagent bottle is replaced.
- the size of bubbles remaining at the end of the liquid feeding pipe is not only relatively large but less than 1 mm, but also has a volume exceeding 5 ul for segmenting the liquid in the liquid feeding pipe having an inner diameter of 1.5 mm. If even one bubble of such a volume exceeds the fluid control valve (bottle side) and enters the dispensing flow path, the dispensing accuracy deteriorates.
- an operation that sucks a reagent that is more than the total integral of the flow path from the reagent bottle 305 and discharges it from the discharge nozzle 300, the flow path on the syringe pump side that could not be prevented by the first back flow operation Remove mixed air bubbles.
- a third mechanism and operation by attaching a bubble detector 308 between the flow path from the reagent bottle 305 to the fluid control valve (bottle side) 303, the presence / absence and amount of bubbles entering from the bottle are determined, It is determined whether to perform the first backflow operation or the second solution discharge operation or to perform the bubble removal process as described above.
- the above three operations or mechanisms may be performed independently or in combination. By combining these methods, the effect is further increased.
- the control unit 307 After the reagent bottle 305 is replaced, information indicating that the operation has been performed is transmitted as a signal to the control unit 307 through the lead 311.
- the control unit 307 recognizes that the reagent bottle 305 has been replaced, the control unit 307 starts an operation of causing the solution in the reagent bottle side pipe 309 to flow backward to the reagent bottle 305 side in order to prevent bubbles from entering the empty reagent bottle 305. To control.
- the suction operation from the newly replaced reagent bottle 305 is started.
- the bubble detector 308 between the reagent bottle 305 and the fluid control valve (bottle side) 303 detects the bubbles and the amount of bubbles. If the value is equal to or greater than the predetermined value, the suction operation is stopped, and if it is less than the predetermined value, the discharge operation for removing the bubbles that have entered the flow path without stopping is performed.
- Diaphragm type solenoid valves are commercially available from several manufacturers.
- solenoid valves with an orifice diameter of 3 mm or less which are often used in analyzer applications, are available in various orifice diameters, dead volumes, and materials, but these internal structures have almost the same shape.
- FIG. 7 shows a simplified internal structure of a typical two-way solenoid valve that is commercially available.
- solenoid valves There are two types of solenoid valves: a normally closed type that opens when energized and a normally open type that closes when energized.
- FIGS. 8 and 9 show a normally closed type.
- the normal open type is different from the normal closed type in the arrangement of springs, but the basic structure other than that is almost the same.
- the electromagnetic valve is composed of a liquid feeding pipe 414 that forms a flow path for flowing a solution and a head 415 portion that closes the flow path, a plunger 411 for moving the diaphragm valve 416, a coil 410, A spring 412 and a conductor 413 connected to the coil 410 are separated into a body 409 portion.
- the head 415 portion constituting the flow path is made of a resin material such as polyether ether ketone (PEEK), polytetrafluoroethylene (PTFE), polyphenylene sulfide (PPS), and the diaphragm is similarly PTFE or FKM of fluorine rubber, Alternatively, acrylonitrile butadiene rubber (NBR) is used.
- PEEK polyether ether ketone
- PTFE polytetrafluoroethylene
- PPS polyphenylene sulfide
- NBR acrylonitrile butadiene rubber
- KPF perflo rubber
- Various other resin materials are also used, but they are selected from materials having strong hydrophobicity, which are basically less contaminated and can reduce pressure loss due to solution resistance. Therefore, it is a material having the property that bubbles are likely to remain.
- the plunger 411, the coil 410, the spring 412, and the conducting wire 413 are mostly made of metal.
- the solenoid valve is arranged such that the head portion is at the bottom and the body 409 portion is at the top. This is to prevent the body 409 from getting wet when water leaks from the head of the solenoid valve. In many cases, water leakage is liable to occur when the nipple 401 portion connecting the electromagnetic valve and the liquid feeding pipe 414 is removed.
- the body portion is made of metal, there is a risk that the plunger 411 and the inner wall portion will rust if liquid spilled from the liquid feeding tube 402 enters from the joint between the body 409 and the head 415. Furthermore, if the coil 410 or the conductive wire 413 is covered with water, it will cause electric leakage, leading to failure of the solenoid valve or the apparatus main body.
- the solenoid valve is turned upside down and fixed to the sheet metal with an inclination with respect to the central axis direction of the solenoid valve. Therefore, compared with the case where the electromagnetic valve is used in a normal posture, the leaked liquid is likely to be applied to the metal body 409 part. Therefore, the risk of water exposure was avoided by making the metal plate 403 for fixing the electromagnetic valve movable. An example of this will be described with reference to FIGS.
- FIG. 10 is a schematic view from the direction in which the solenoid valve is fixed to the fixing metal plate 403 (fixing member) so that the body 404 is positioned downward, and the body 404 liquid introduction port side is located on the right and the drainage port is located on the left. .
- the screw 400 is fixed to the fixing metal plate 403 so as to be suspended.
- the solenoid valve is fixed so that the straight line connecting the liquid introduction port and the drain port is 65 ° with respect to the vertical line, and the central axis 408 of the solenoid valve is 65 ° with respect to the horizontal line.
- the fixing sheet metal 403 has a rectangular shape that is long in the vertical direction.
- the fixing metal plate 403 has an angle switching mechanism capable of changing the angle between a straight line connecting the liquid introduction port and the liquid discharge port of the fluid control valve and the horizontal plane.
- the angle switching mechanism has, for example, a fulcrum on the lower side, and can be arbitrarily moved until the angle ⁇ z formed by the central axis of the electromagnetic valve and the horizontal line reaches 0 ° with the fulcrum as the rotation axis 406.
- FIG. 10 shows a state in which the fixing sheet metal 403 is upright about the rotating shaft 406, and FIG. 11 shows a state in which the fixing sheet metal 403 is tilted about the rotating shaft 406.
- the fixing sheet metal 403 is in an upright state (at least inclined to the horizontal plane as described above), and when the liquid feeding pipe 402 is removed for maintenance or the like, the apparatus is turned to the front as shown in FIG. Then, the fixing metal plate 403 is tilted toward the front side.
- a straight line connecting the liquid introduction port and the drainage port of the fluid control valve is at an angle that is perpendicular to the horizontal plane.
- the solenoid valve falls down sideways and the accessibility to the nipple is improved. Further, even if water leaks from the liquid feeding pipe 402, it is possible to avoid water exposure without reaching the body 409 of the electromagnetic valve.
- each fixing arrangement can be made using the mounting sheet metal 408.
- the mounting sheet metal 408 is detachably fixed to the fixing sheet metal 403.
- the mounting sheet metal 408 includes a first mounting portion at an angle at which the fluid control valve can be held inclined with respect to the fixing sheet metal 403, and an angle at which the flow path of the fluid control valve is in a vertical direction.
- the mounting sheet metal 408 also functions as an angle switching mechanism. As shown in FIG. 12, the dispensing plate is screwed obliquely to the fixing metal plate 403 by the first mounting portion, and during maintenance, the bent portion (holding portion) of the mounting metal plate 408 is hooked on the fixing metal plate 403 as shown in FIG. The work of removing the nipple 401 can be performed.
- the mounting method may be selected in consideration of the space in the device and accessibility.
- this invention is not limited to the above-mentioned Example, Various modifications are included.
- the above-described embodiments have been described in detail for easy understanding of the present invention, and are not necessarily limited to those having all the configurations described.
- a part of the configuration of one embodiment can be replaced with the configuration of another embodiment, and the configuration of another embodiment can be added to the configuration of one embodiment.
- Each of the above-described configurations, functions, processing units, processing means, and the like may be realized by hardware by designing a part or all of them with, for example, an integrated circuit.
- Each of the above-described configurations, functions, and the like may be realized by software by interpreting and executing a program that realizes each function by the processor.
- Information such as programs, tables, and files for realizing each function can be stored in a recording device such as a memory, a hard disk, an SSD (Solid State Drive), or a recording medium such as an IC card, an SD card, or an optical disk.
- a recording device such as a memory, a hard disk, an SSD (Solid State Drive), or a recording medium such as an IC card, an SD card, or an optical disk.
- control lines and information lines indicate what is considered necessary for the explanation, and not all the control lines and information lines on the product are necessarily shown. Actually, it may be considered that almost all the components are connected to each other.
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Abstract
Description
P’軸:電磁弁の中心軸の向き、
z軸:鉛直方向、
x軸:流体制御弁をP’軸=z軸にして配置したときのある特定の一状態におけるINとOUTを結ぶ直線の向き、
θr:電磁弁のINとOUTを結ぶ直線のx軸に対する回転角度、
θz:P’軸と水平面とのなす角
と定義する。このときに、θz=90°、65°、45°、30°、0°となるそれぞれの条件で一度弁室内を空気で満たしてから送液を行い、気泡が完全に抜けきるまでの時間を計測した。その結果、θz=65°の時に最も気泡抜けが早く、弁室に液体が満たされてから5秒以内に気泡が完全に除去された。またθz=90°、45°、30°では10秒以上の時間を要するものの完全な気泡抜けが見られた。θz=0°では完全に気泡が抜ける場合もあったが、複数回の試行で1mm程度の気泡が電磁弁のボディ、あるいはボディとダイヤフラム弁の隙間に気泡が捕捉され1分以上経過しても抜けきらなかった。したがって、30°≦θz≦90°に配置することで気泡を除去する効果を確認した。特に、65°にすることで最も迅速に気泡を除去することが可能となる(図14)。
分注実験を1000テスト実施し、気泡混入の際に見られる平均分注量に対して1~5uL程度の低値が一度も発生しないことを確認した。
200:ダイヤフラム、201:弁室、202:ヘッド、203:排出口、204:導液口、
300:吐出ノズル、301:シリンジポンプ、302:流体制御弁(吐出ノズル側)、303:流体制御弁(試薬ボトル側)、304:送液管、305:試薬ボトル、306:分岐、307:制御部、308:気泡検知器、309:試薬ボトル側配管、310:試薬ボトル底面、311:導線、
400:ネジ、401:ニップル、402:送液管、403:固定用板金、404:ボディ、405:導線、406:回転軸、407:中心軸、408:取付け板金、409:ボディ、410:コイル、411:プランジャ、412:スプリング、413:導線、414:送液管、415:ヘッド、416:ダイヤフラム弁、417:止水栓
Claims (9)
- 吐出ノズルと、
試薬が格納された試薬ボトルと前記吐出ノズルを接続するように配置され、前記試薬の流路を形成する送液管と、
前記試薬ボトルと前記吐出ノズルをつなぐ送液管の経路上に配置された流体制御弁と、を備え、
前記流体制御弁は、導液口と排液口を有する前記試薬の流路と、前記流路の途中に設けられたダイヤフラム弁とを備え、
前記ダイヤフラム弁が前記流体制御弁の流路の下に配置される向きで前記流体制御弁が配置されることを特徴とする分注装置。 - 請求項1に記載の分注装置において、
前記ダイヤフラム弁の中心軸が水平面からなす角は30°以上90度以下であることを特徴とする分注装置。 - 請求項1に記載の分注装置において、
前記ダイヤフラム弁の流路は、前記導液口が前記排液口より低い位置になる向きで、前記ダイヤフラム弁が配置されることを特徴とする分注装置。 - 請求項1に記載の分注装置において、
前記ダイヤフラム弁が親水化処理されていることを特徴とする分注装置。 - 請求項1に記載の分注装置において、
前記試薬ボトルから前記流体制御弁までの前記試薬の流路に配置される気泡検知器と、
前記気泡検知器で検知された気泡の量に応じて、前記試薬の分注処理を行うか気泡除去処理を行うかを決定する制御部とを有することを特徴とする分注装置。 - 請求項1に記載の分注装置において、
前記流体制御弁が固定される固定用部材と、
前記流体制御弁の前記導液口と前記排液口を結ぶ直線と水平面との角度を可変とする角度切替機構とを有することを特徴とする分注装置。 - 請求項6に記載の分注装置において、
前記角度切替機構は、分注動作が行われるときは前記前記導液口と前記排液口を結ぶ直線が前記水平面に対して傾斜する角度になり、メンテナンスが行われるときは前記前記導液口と前記排液口を結ぶ直線が前記水平面に対して垂直となる角度に切替可能であることを特徴とする分注装置。 - 請求項6に記載の分注装置において、
前記角度切替機構は前記固定用部材の回転軸であることを特徴とする分注装置。 - 請求項6に記載の分注装置において、
前記角度切替機構は前記固定用部材に取り付けられる取付け部材であって、
前記取付け部材は、前記流体制御弁を前記固定用部材に対して傾斜して保持することができる角度にある第一取付け部と、前記流体制御弁の流路が鉛直方向になるような角度に前記流体制御弁を保持する保持部と、前記流体制御弁に固定される第2取付け部と、を有することを特徴とする分注装置。
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CN110734851A (zh) * | 2018-07-19 | 2020-01-31 | 深圳华大生命科学研究院 | 换液装置、基因测序仪 |
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US10544770B2 (en) * | 2017-06-29 | 2020-01-28 | Woodward, Inc. | Mecha-hydraulic actuated inlet control valve |
US11346334B2 (en) | 2018-12-20 | 2022-05-31 | Halliburton Energy Services, Inc. | Method for repeatable and accurate dispensing of fluids containing solids |
WO2021024527A1 (ja) * | 2019-08-05 | 2021-02-11 | 株式会社日立ハイテク | 脱気装置及び電解質測定システム |
CN114435722B (zh) * | 2021-12-07 | 2024-05-14 | 佛山迪安医学检验实验室有限公司 | 一种防菌滴取式检测用试剂盒 |
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