WO2006024203A1 - A multiple channel pipetting device - Google Patents

A multiple channel pipetting device Download PDF

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Publication number
WO2006024203A1
WO2006024203A1 PCT/CN2004/001343 CN2004001343W WO2006024203A1 WO 2006024203 A1 WO2006024203 A1 WO 2006024203A1 CN 2004001343 W CN2004001343 W CN 2004001343W WO 2006024203 A1 WO2006024203 A1 WO 2006024203A1
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WO
WIPO (PCT)
Prior art keywords
frame
push rod
syringe
plate
fixing plate
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2004/001343
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English (en)
French (fr)
Inventor
Dong Wang
Renyuan Chen
Kun Zou
Jing Cheng
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tsinghua University
CapitalBio Corp
Original Assignee
Tsinghua University
CapitalBio Corp
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Filing date
Publication date
Application filed by Tsinghua University, CapitalBio Corp filed Critical Tsinghua University
Publication of WO2006024203A1 publication Critical patent/WO2006024203A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01LCHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
    • B01L9/00Supporting devices; Holding devices
    • B01L9/54Supports specially adapted for pipettes and burettes
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N35/00Automatic analysis not limited to methods or materials provided for in any single one of groups G01N1/00 - G01N33/00; Handling materials therefor
    • G01N35/10Devices for transferring samples or any liquids to, in, or from, the analysis apparatus, e.g. suction devices, injection devices
    • G01N35/1065Multiple transfer devices
    • G01N35/1074Multiple transfer devices arranged in a two-dimensional array
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01LCHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
    • B01L3/00Containers or dishes for laboratory use, e.g. laboratory glassware; Droppers
    • B01L3/02Burettes; Pipettes
    • B01L3/021Pipettes, i.e. with only one conduit for withdrawing and redistributing liquids
    • B01L3/0217Pipettes, i.e. with only one conduit for withdrawing and redistributing liquids of the plunger pump type

Definitions

  • the present invention relates to a pipetting device, and more particularly to a multi-channel pipette that can be used with a robot.
  • Pipettes typically use a disposable tip that is attached to the pipette prior to operation.
  • the pipette has a knob to adjust the amount of sample to be taken; after setting the sample volume, press the button at the end of the pipette to discharge the air; put the pipette into the liquid to release the button, the set volume can be set.
  • the liquid is sucked up; then the pipette is placed in the drain position and the liquid is discharged by pressing the button.
  • the pipette is easy to operate, but it has at least three disadvantages: The accuracy is not high; manual operation is required, and human error is easy to introduce; the flux is small, and only a few samples can be transferred at a time.
  • the automatic pipetting device consists of an automatic pipette and a robot, which work together to achieve a pipetting operation.
  • the robot carries an automatic pipette to realize the spatial movement of the pipette between the liquid source position, the target position, and the cleaning position; and the automatic pipette realizes sampling at the source position, suction at the target position under the control of the circuit, Cleaning operation at the cleaning location.
  • Automatic pipettes typically operate simultaneously on multiple channels, such as 4, 8, 12, 24, 96 channels. Automatic pipettes work in many different ways, but most can be divided into two categories: volumetric and temporal. The volumetric method is based on the principle of a syringe pump.
  • the volumetric method is simple in quantification, relatively low in cost, and can be multi-channel simultaneously. jobs.
  • the time rule is easy to achieve a small amount of liquid transfer, but the cost is higher, generally using 4/8/16 channels; at the same time, transferring the same volume of liquid, when the liquid viscosity and density are different, it needs to be determined experimentally.
  • W09926723 discloses an automatic pipette consisting of a pump chamber containing a pump hole of the same number of channels and a plurality of piston push rods, one for each pump hole, and each piston simultaneously moving to achieve Multiple channels simultaneously perform aspiration and nesting operations.
  • the disadvantages of this type of pipette are: To prevent air leakage when the piston moves in the pump hole and to reduce the wear of the piston and the inner wall of the pump, each piston and pump hole must have a good fit and coaxiality. . At the same time, in order to ensure the consistency between the channels, there must be good consistency between the pump holes and between the pistons. This high-precision requirement increases the difficulty of processing and greatly increases the cost. At the same time, once a pump hole is broken, the entire pump cavity has to be replaced, and the maintenance cost is high.
  • the multi-channel pipette comprises a plurality of pipetting devices and a frame for fixing the pipetting device, the pipetting device comprising a needle, a syringe and a push rod, the needle and the syringe
  • the push rod is sleeved in the barrel; the top of the frame is provided with a pressure plate that can move up and down, and the head of the push rod is connected to the bottom surface of the pressure plate.
  • the frame includes a frame and a syringe fixing plate fixedly connected to the frame and having a plurality of through holes; the port of the syringe away from the needle is provided with an outwardly extending positioning ring, and the positioning ring is located at the Between the frame and the syringe fixing plate, the push rod is sleeved in the through hole of the syringe fixing plate.
  • a rubber pad I is usually disposed between the top surface of the frame and the syringe fixing plate, so as to have a certain buffering effect between the end surface of the syringe and the fixing plate of the syringe.
  • the bottom surface of the frame is a guide plate provided with a plurality of through holes, and the needle or the syringe is inserted through the through hole of the guide plate for controlling the direction of the needle.
  • the pressure plate includes a bottom plate and a push rod fixing plate provided with a plurality of through holes, and the bottom plate and the push rod fixing plate press the eccentric shaft to rotate the eccentric shaft to press the two plates to fix the push rod.
  • a rubber mat II is also usually provided between the bottom plate and the push rod fixing plate.
  • the platen is further provided with a platen clamp connected to the pressure plate, through which the pressure plate and the w-axis slider of the manipulator are And a frame clamp connected to the side of the frame, the frame clamp is connected with the W-axis base of the robot, and the frame body and the pressure plate are moved relative to each other by controlling the movement of the slider of the robot, thereby realizing suction and pushing Liquid handling.
  • the number of pipette pipetting devices of the present invention can be adjusted according to actual needs, and can be selected 4 8 12 24 96 and the like.
  • Figure 1 is a schematic view showing the structure of a multi-channel pipette
  • FIG. 2 is a schematic structural view of a pipetting device of a multi-channel pipette
  • 3A is a schematic structural view of a frame of a multi-channel pipette
  • Figure 3B is an overall view of the frame of the multi-channel pipette
  • Figure 4 is a structural view of a pressure plate of a multi-channel pipette
  • Figure 5 is a mounting view between the pressure plate and the platen clamp
  • Figure 6 is a mounting diagram between the frame and the frame fixture
  • Figure 7 is a diagram showing the positional relationship between the frame body and the pressure plate when the multi-channel pipette is aspirated
  • Figure 8 is a diagram showing the movement and connection of various parts of a multi-channel pipette mounted on a robot. The best way to implement the invention
  • the 96-channel pipette of this embodiment is arranged in an array of 12 rows and 8 columns and a pitch of 9.
  • the pipette is composed of a pressure plate 16, a frame 17, and a plate clamp 18 and a frame clamp 19, and the like. It consists of four parts that can be attached to the robot by two clamps.
  • each pipetting device of the pipette is composed of a syringe 1, a needle 15 fixed to the barrel 1, and a pusher 2, and a positioning ring at the end of the syringe away from the needle. 14, to facilitate the fixation of the syringe.
  • the pipetting device can also be obtained by simple processing of a common micro-sampler, for example, grinding the hand-held end of the end of the micro-injector, and then bonding a stainless steel positioning ring 14, which is The outer diameter is greater than the respective mounting apertures on the frame 5, and each syringe and its push rod form a pipetting channel for the pipette.
  • FIG. 3A is a schematic structural view of a frame
  • FIG. 3B is an overall view of the frame.
  • the frame body 17 of the present embodiment is composed of a frame 5, a guide plate 6, a syringe fixing plate 3, a rubber pad 14, and the like, a top surface of the frame 5, a guide plate 6, a syringe fixing plate 3, and
  • the rubber pad 14 has 96 through holes, and the syringes 1 are mounted side by side in the through holes of the upper surface of the frame 5, and the upper end faces thereof are covered with a rubber pad 14 and a syringe fixing plate 3. Cover, fixed.
  • the rubber pad 14 and the syringe fixing plate 3 are also provided with mounting holes for the screws 7, which can be fixed to the frame 5 by screws to form a frame.
  • the pressure plate is composed of a push rod fixing plate 8, a rubber pad 119 having a through hole, a bottom plate 10, and a pressing knob 111 having an eccentric shaft.
  • the push rod 2 passes through the bottom plate 10 and the rubber pad 119, and the head is located between the push rod fixing plate 8 and the bottom plate 10.
  • the eccentric shaft is driven by the tightening knob 111 to generate a pressing force between the two plates to fix the push rod 2 to the push rod 2 Press on the plate.
  • the platen clamp 18 is located on the surface of the platen, and the two are screwed through the mounting holes in the bottom plate of the clamp.
  • the mounting holes on the vertical plate of the platen clamp 18 are used to connect with the W-axis slider of the robot.
  • the frame jig 19 is attached to the side of the frame, the frame is placed in the jig, and the knob 1113 is rotated and tightened, and the frame can be fixed by the pressing force between the knob and the frame.
  • the back of the frame clamp has mounting holes for connection to the W-axis base of the robot.
  • Figure 7 is a diagram showing the positional relationship between the pressure plate and the frame when the pipette is aspirated, showing that the liquid is sucked by the relative movement of the push rod and the syringe.
  • Example 2 Assembly and operation of 96-channel pipette and robot
  • the robot carrying the multi-channel pipette of the present invention for pipetting operation is composed of four moving shaft units.
  • the X and Y axes move in a horizontal plane, the moving directions are 90 degrees with each other; the Z axis moves in a vertical direction; the W axis is connected to the Z axis slider, and the Z axis base is driven by the Z axis slider.
  • the seat is moved up and down relative to each other; the frame and the pressure plate of the pipette are respectively connected with the base and the slider of the W-axis, and the platen moves up and down with respect to the frame by the W-axis slider, thereby realizing the pipetting operation.
  • Figure 8 is a diagram showing the movement and connection relationship of various parts of the multi-channel pipette mounted on the manipulator of the present invention.
  • Example 1 The 96-channel pipette described in Example 1 can be assembled as follows:
  • each push rod moves upward relative to each syringe to draw liquid into the channel; move the robot ⁇ , ⁇ and ⁇ axes, move the pipette to the target plate position, and move the W-axis slider downward, each push rod is opposite
  • the syringe moves downward, the liquid can be discharged from the channel into the target hole; then the pipette is moved to the cleaning position, and the W-axis slider is repeatedly moved up and down to allow the cleaning liquid to continuously enter and exit the channel, thereby cleaning the pipetting.
  • Each channel of the device Repeat the above steps to achieve multiple pipetting operations.
  • the liquid sucked from the source plate can be discharged to a set of positions of one target plate, or can be discharged to a plurality of target plates or a plurality of positions of one target plate.
  • the multi-channel pipettes provided by the invention are independent of each other and can be separately taken out from the pipette. Once a pipetting device fails, it can be easily replaced without replacing other pipetting.
  • the device is convenient to disassemble and assemble, and is easy to maintain, which can greatly reduce the maintenance cost.
  • the pipetting device used is simple to process, and can avoid the use of pump holes with relatively high processing precision, which can greatly reduce the processing difficulty and cost of the pipette; Simple comparison and screening can be performed for each pipetting device, and the pipetting device with large difference in the amount of pipetting is removed, thereby ensuring the consistency of the pipetting amount between the channels.
  • the invention can be conveniently connected to the manipulator during use, and the manipulator can be controlled to control the liquid absorption, drainage and displacement of the pipette, thereby realizing simultaneous and automatic operation of the multi-channel pipette.
  • the multi-channel pipette of the invention has the advantages of convenient assembly, low processing difficulty, low maintenance cost and high pipetting precision, and the single channel is used multiple times when the processed 100 ⁇ ⁇ micro sampler is used as the pipetting device. Transfer of 10 ⁇ l of 50% DMS0 can achieve ⁇ 6% accuracy and 4% cv value.

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  • Analytical Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Clinical Laboratory Science (AREA)
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Description

一种多通道移液器 技术领域
本发明涉及一种移液装置, 特别是涉及一种可与机械手配合使用的多通 道移液器。
背景技术 、
目前, 用于微量液体转移、 分配的工具有手动操作和机器人自动操作两 类。 液体转移应用场合有两种, 第一种是将一定体积的液体从源位置取出并 全部转移到目标位置, 另外一种是将从源位置取得的液体等量地分配到多个 目标位置。
手动操作的有移液枪等, 一般每支移液枪只有一个通道, 即每次操作只 能转移一种液体; 多通道的移液枪被称为排枪。 移液枪一般都使用一次性枪 头, 进行操作前将枪头装在移液枪上。 移液枪上有旋钮可以调节要吸取的样 品量; 设定吸样量后, 按动移液器末端的按钮排出空气; 将移液枪放到液体 里松开按钮, 即可将设定体积的液体吸取上来; 然后将移液器放到排液位置, 按下按钮, 即可将液体排出。 移液枪操作便捷, 但其至少有三个缺点: 精度 不高; 需要手工操作, 容易引入人为误差; 通量小, 每次只能转移几种样品。
自动移液设备由自动移液器与机械手组成, 两者相互配合以实现移液操 作。 机械手携带自动移液器实现移液器在液体源位置、 目标位置、 清洗位置 间的空间运动; 而自动移液器则在电路的控制下, 实现在源位置的取样、 目 标位置的吸样、 清洗位置的清洗操作。 自动移液器一般是多个通道同时工作, 如 4、 8、 12、 24、 96通道。 自动移液器的工作原理有很多种, 但大都可以分 为两类: 体积法和时间法。 体积法基于注射泵原理。 吸取液体时, 随着泵内 活塞被拉出, 液体在泵腔内负压的作用下被吸入泵腔, 活塞运动的距离乘以 泵腔截面面积即为吸样量; 同理, 推动活塞, 即可将与活塞移动所经过空间 同样体积大小的液体推出来。 时间法移液技术通过通道内的压力和位于液体 管道中间的阀门实现液体的定量分配。 压力用来将液体吸入移液器或喷出, 阀门的开关用来控制是否将压力施加在液体上; 通过控制压力的大小和阀门 打开时间的长短可以控制转移液体的量。 这两种技术都可以实现上述一对一 和一对多的移液操作。 但体积法定量简单, 成本相对较低, 可以多通道同时 工作。 时间法则易于实现小的液体转移量, 但成本较高, 一般采用 4/8/16通 道; 同时, 转移相同体积的液体, 当液体的粘度和密度等性质不同时需要通 过实验确定。
W09926723公开了一种自动移液器, 该自动移液器由包含与通道数数量 相同的泵孔的泵腔和多个活塞推杆组成, 每个活塞对应一个泵孔, 各个活塞 同时运动以实现多通道同时进行吸样和排样操作。 这种移液器的缺点在于: 为防止活塞在泵孔内移动时产生漏气现象和减小活塞和泵体内壁的磨损, 每 个活塞和泵孔都必须有很好的配合、 同轴度。 同时, 为保证各通道间的一致 性, 各个泵孔间以及各个活塞间都必须有很好的一致性。 这种高精度要求一 方面提高了加工难度, 同时也大大加大成本; 同时, 一旦某个泵孔坏掉, 整 个泵腔都得换掉, 维修成本很高。
发明公开
本发明的目的是提供一种加工方便、 维修简便的可以多通道同时工作的 移液器。
本发明所提供的多通道移液器, 包括若干个移液装置和用于固定所述移 液装置的框体, 所述移液装置包括针头、 针筒及推杆, 所述针头与针筒紧密 连接, 所述推杆套设于所述针筒内; 所述框体的顶部设有可上下移动的压板, 所述推杆的头部与压板的底面相连。
其中, 所述框体包括框架及固定连接于框架上的设有若干通孔的针筒固 定板; 所述针筒远离针头的端口设有向外延伸的定位圈, 所述定位圈位于所 述框架和针筒固定板之间, 所述推杆套设在所述针筒固定板的通孔中。
为了便于固定针筒, 所述框架的顶面与所述针筒固定板之间还通常设有 橡胶垫 I, 使针筒端面与针筒固定板之间有一定的缓冲作用。
所述框架的底面为设有若千通孔的导向板, 所述针头或针筒穿设在导向 板的通孔中, 用于控制针头的方向。
所述压板包括设有若干通孔的底板和推杆固定板, 所述底板和推杆固定 板通过旋紧旋钮带动偏心轴转动将两块板压紧, 从而固定推杆。 在所述底板 和推杆固定板之间还通常设有橡胶垫 II。
为了能够与机械手配合使用, 便于移液器的取液和移液操作, 在所述压 板上还设有与压板连接的压板夹具, 通过该夹具将压板与机械手的 w轴滑块 相连接; 以及连接于框体侧面的框体夹具, 该框体夹具与机械手的 W轴基座 相连接, 通过控制机械手滑块的运动使框体和压板作相对运动, 从而实现吸 取液体和推出液体的操作。 '
本发明移液器移液装置的数量可以根据实际需要进行调整, 可以选择 4 8 12 24 96等。
附图说明
图 1为多通道移液器的结构示意图;
图 2为多通道移液器的移液装置结构示意图;
图 3A为多通道移液器的框体的结构示意图;
图 3B为多通道移液器的框体的整体图;
图 4为多通道移液器的压板的结构图;
图 5为压板和压板夹具之间的安装图;
图 6为框体和框体夹具之间的安装图; .
图 7为多通道移液器吸液时框体和压板间的位置关系图;
图 8为多通道移液器安装在机械手上各部分的运动和连接关系图。 实施发明的最佳方式
实施例 1 96通道移液器
如图 1所示, 本实施例的 96通道移液器按 12行 8列, 间距为 9 的阵 列排列, 该移液器由压板 16, 框体 17, 和压板夹具 18与框体夹具 19等四个 部分组成, 通过两个夹具可以将该移液器连接到机械手上。
如图 2所示, 移液器的每个移液装置由针筒 1, 固定于针筒 1上的针头 15, 和推杆 2三部分构成, 在针筒远离针头的端面还有一个定位圈 14, 以方 便针筒的固定。 另外, 该移液装置也能通过对普通微量进样器进行简单加工 得到, 例如, 将微量进样器末端的手持端磨掉, 然后粘接上一个不锈钢定位 圈 14即可, 该定位圈的外径大于框架 5上的各个安装孔径, 每个针筒和其推 杆构成移液器的一个移液通道。
图 3A是框体的结构示意图, 图 3B是框体的整体图。 如图 3所示, 本实 施例框体 17由框架 5、 导向板 6、 针筒固定板 3、 橡胶垫 14等几部分组成, 框架 5的顶面、 导向板 6、针筒固定板 3和橡胶垫 14上都有 96个通孔, 针筒 1并排安装在框架 5上表面通孔中, 其上端面用橡胶垫 14和针筒固定板 3覆 盖、 固定。 另外, 橡胶垫 14和针筒固定板 3还设有螺钉 7的安装孔, 可用螺 钉使之固定在框架 5上组成框体。
如图 4所示, 在本实施例中, 压板由推杆固定板 8, 设有通孔的橡胶垫 119和底板 10, 以及带有偏心轴的压紧旋钮 111组成。 推杆 2穿过底板 10和 橡胶垫 119, 其头部位于推杆固定板 8和底板 10之间, 通过旋紧旋钮 111带 动偏心轴使两块板间产生压紧力将推杆 2固定于压板上。
如图 5所示, 压板夹具 18位于压板上表面, 两者通过夹具底板上的安装 孔用螺钉连接, 压板夹具 18立板上的安装孔用来和机械手 W轴滑块连接。
如图 6所示, 框体夹具 19装于框体侧面, 将框体放入夹具中, 旋转旋紧 旋钮 1113, 通过旋钮和框架间的压紧力即可将框体固定。 框体夹具的背面有 安装孔, 用于和机械手 W轴基座相连。
图 7为移液器吸液时压板和框体间的位置关系图, 显示通过推杆与针筒 的相对运动吸取液体。
实施例 2、 96通道移液器与机械手的组装及操作
携带本发明多通道移液器实现移液操作的机械手由四个运动轴单元组 成。 其中, X和 Y轴在水平面内运动, 运动方向互成 90度; Z轴沿竖直方向 运动; W轴连接在 Z轴的滑块上, 在 Z轴滑块的带动下, 相对 Z轴基座作上下 相对运动; 移液器的框体和压板分别与 W轴的基座和滑块相连, 在 W轴滑块 的带动下, 压板相对于框体上下运动, 从而实现移液操作。
图 8为本发明多通道移液器装在机械手上各部分的运动和连接关系图。 通过控制机械手滑块上下滑动, 使压板中的 96个推杆 2相对于框体中的 96 个针筒 1分别作相对运动, 从而实现吸取液体和推出液体操作。
实施例 1中所描述的 96通道移液器可以按如下过程进行组装:
1 )先将压板夹具 18和框体夹具 19分别固定在机械手 W轴的滑块和基座 上, 调整各自安装面的水平;
2 ) 将导向板 6固定在框架 5下端面, 然后, 将 96个针筒 1分别放在框 架 5的 96个孔内, 接着将针筒固定板 3和橡胶垫 14放于框架 5上, 并使其 上各自 96个孔分别和各个针筒的内孔对应, 通过螺钉 7将针筒固定板 3、 橡 胶垫 14固定在框架 5上, 形成框体。将组装好的框体放入到框体夹具 19中, 旋动旋钮 1113将其固定; 3 )将底板 10和橡胶垫 119放到针筒固定板 3上, 并使各自的 96个孔互 相对应; 将 96个推杆 2穿过底板 10和橡胶垫 119放入针筒 1的内孔中, 抬 高底板 10和橡胶垫 119, 以使 96个推杆 2在 96个针筒 1中保持自由的竖直 状态; 然后, 将推杆固定板 8安装进来, 使底板 10和橡胶垫 119穿过推杆固 定板 8的槽, 旋转旋钮 111将 96个推杆的头部压紧固定组成压板;
4 ) 最后, 将压板和压板夹具 18用螺钉连接起来, 并使推杆固定板 8处 于水平状态。
进行移液操作时, 在运动程序控制下, 通过机械手 X, Υ, Ζ轴运动将移 液器移动到源板位置, 并将各移液通道的针头插入到液面中, 向上移动 W轴 滑块, 各推杆相对各针筒向上运动, 将液体吸入通道中; 移动机械手 Χ,Υ和 Ζ 轴, 将移液器移动到目标板位置, 向下移动 W轴滑块, 各推杆相对各针筒向 下运动, 即可将液体从通道排出到目标孔中; 之后将移液器移动到清洗位置, 反复向上、 向下移动 W轴滑块, 使清洗液不断进出通道, 从而清洗移液器各 通道; 重复上述步骤即可实现多次移液操作。
进行移液操作时,可以将从源板吸取的液体排到一个目标板的一组位置, 也可以排到多个目标板或者一个目标板的多个位置。
工业应用
本发明所提供的多通道移液器各移液装置相互独立, 可以单独从移液器 上取出, 一旦某一移液装置发生故障, 可以很方便的将其替换, 而不需要更 换其他移液装置, 拆装方便, 便于维修, 能大大降低维护成本; 所采用的移 液装置加工简单, 能避免使用加工精度要求相当高的泵孔, 能大大降低移液 器的加工难度和成本; 另外, 对各移液装置可以进行简单的比较筛选, 去掉 移液量差异大的移液装置, 从而保证各通道间移液量的一致性。 在使用时可 以很方便地将本发明与机械手连接, 通过操纵机械手来控制移液器的吸液、 排液以及位移等动作, 从而实现移液器多通道同时、 自动工作。 本发明多通 道移液器组装便捷, 加工难度低, 维护成本低廉, 同时还具有移液精度高的 优点, 采用经加工后的 100 μ ΐ微量进样器作为移液装置时, 单通道多次转移 10 μ 1的 50%DMS0可以达到 ±6%的准确度和 4%的 cv值。

Claims

权 利 要 求 书
1、一种多通道移液器, 包括若干个移液装置和用于固定所述移液装置的 框体, 其特征在于: 所述移液装置包括针头、 针筒及推杆, 所述针头与针筒 紧密连接, 所述推杆套设于所述针筒内; 所述框体的顶部设有可上下移动的 压板, 所述推杆的头部与压板的底面相连。
2、根据权利要求 1所述的多通道移液器, 其特征在于: 所述框体包括框 架及固定连接于框架上的设有若干通孔的针筒固定板; 所述针筒远离针头的 端口设有向外延伸的定位圈, 所述定位圈位于所述框架和针筒固定板之间, 所述推杆套设在所述针筒固定板的通孔中。
3、根据权利要求 2所述的多通道移液器, 其特征在于: 所述框架的顶面 与所述针筒固定板之间还设有橡胶垫 I。
4、根据权利要求 2或 3所述的多通道移液器, 其特征在于: 所述框架的 底面为设有若干通孔的导向板, 所述针头或针筒穿设在导向板的通孔中。
5、 根据权利要求 1或 2或 3所述的多通道移液器, 其特征在于: 所述压 板包括设有若干通孔的底板和推杆固定板, 所述底板和推杆固定板籍带偏心 轴的旋紧旋钮连接。
6、根据权利要求 4所述的多通道移液器, 其特征在于: 所述压板包括设 有若千通孔的底板和推杆固定板, 所述底板和推杆固定板籍带偏心轴的旋紧 旋钮连接。
7、根据权利要求 5所述的多通道移液器, 其特征在于: 所述底板和推杆 固定板之间还有橡胶垫 II。
8、根据权利要求 1或 2或 3所述的多通道移液器, 其特征在于: 所述压 板上部还设有压板夹具。
9、 根据权利要求 1或 2或 3所述的多通道移液器, 其特征在于: 所述框 体的侧面设有框体夹具。
10、 根据权利要求 8所述的多通道移液器, 其特征在于: 所述框体的侧 面设有框体夹具。
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