CN102597748A - 带有气动驱动的多腔蠕动泵的水分析装置 - Google Patents

带有气动驱动的多腔蠕动泵的水分析装置 Download PDF

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CN102597748A
CN102597748A CN2010800480117A CN201080048011A CN102597748A CN 102597748 A CN102597748 A CN 102597748A CN 2010800480117 A CN2010800480117 A CN 2010800480117A CN 201080048011 A CN201080048011 A CN 201080048011A CN 102597748 A CN102597748 A CN 102597748A
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A.法杰姆
R.尤思曼
K.伯戈尔德
U.伦德格林
B.德海杰
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Abstract

本发明涉及一种水分析装置(10)，该水分析装置带有气动操纵的多腔室蠕动泵(18)。蠕动泵(18)具有基板(40)，在所述基板(40)的近侧带有多个近侧开口的泵腔室(41-43)；在所述基板(40)的近侧上封闭泵腔室(41-43)的、流体密封并且弹性的泵膜(46)，以及在所述泵膜(46)上的盖板(48)，其中，所述盖板(48)在各泵腔室(41-43)的区域中分别具有一个气动的促动通道(51-53)，所述促动通道可为了操纵泵膜(46)而连接在过压源(30)上。两个泵腔室(41，42；42，43)之间设有分别一个连接通道(71，73)，所述连接通道在基板(40)的远侧构造为槽(70，72)，其中，在所述基板(40)的远侧在连接通道-槽(70，72)的区域中设置单独的槽覆盖件(80)，该槽覆盖件封闭所述连接通道-槽(70，72)远侧的开口侧。

Description

带有气动驱动的多腔蠕动泵的水分析装置
技术领域
本发明涉及一种水分析装置，该水分析装置带有气动操纵的多腔室蠕动泵。
背景技术
流体(例如水样、液态的透析液、液态的分析物、喷淋液体等)通过泵输送到水分析装置中。如果分析装置微流路地构造，则蠕动泵是尤其适合的泵类型。这种蠕动泵具有分别多个，优选三个泵腔室，这些腔室被连续填充和排空，以便通过这种方式产生单向的蠕动泵送过程。
由US5593290A已知一种微流路的多腔蠕动泵，其具有三个泵腔室，所述腔室构造在基板近侧上并且分别由弹性的泵膜封闭。相邻的泵腔室分别通过连接通道相互连接，该连接通道以在近侧开口的槽的形式构造在基板中，所述槽由中间板封闭。中间板在泵腔室的区域中具有相应的通孔。在中间板的近侧设置有弹性的泵膜，在该泵膜上又固定有盖板，该盖板对于每个泵腔室具有一个气动的促动通道。
这种蠕动泵的制造及其要求严格，因为基板和中间板必须以小于0.1mm的精度相互对齐。为了确保三个泵腔室分别尽可能一致的总容积，中间板由薄膜构成。在薄膜中精确制造通孔在技术上要求苛刻。
发明内容
本发明所要解决的技术问题是，创造一种水分析装置，带有可容易制造的气动操纵的多腔蠕动泵。
按照本发明，该技术问题通过具有权利要求1所述的特征的水分析装置解决。
在按本发明的水分析装置中，两个泵腔室之间的连接通道以槽的形式构造在基板的远侧。在连接通道-槽的区域内，在基板的远侧设置单独的槽覆盖件，该槽覆盖件封闭连接通道-槽远侧的开口侧。现在，槽被置于基板背对泵腔室的侧面上。槽可以通过简单的槽覆盖件封闭。不再需要包括凹槽或孔的中间板。槽覆盖件例如可以是大面积的物体，其覆盖基板的整个远侧。不需要精确定位槽覆盖件，这明显简化了组装。
泵由唯一一个泵膜封闭，但当然也可以通过单独的泵膜封闭。
按照一种优选的设计构造，基板是塑料注塑件，该基板既具有所有的泵腔室，也具有构造为槽的连接通道。因为基板仅仅在基板的远侧和近侧具有凹槽，所以可以毫无问题地脱模。
按照一种优选的设计构造，槽覆盖件是柔性的盖膜。盖膜具有有限的弹性，因此盖膜能够与基板远侧上的不平度相适应。由此避免了由于不平度造成的不密封性，这本来在刚性的槽覆盖件时几乎是不可避免的。通过为槽覆盖件使用柔性的盖膜可以在基板的远侧舍弃高的平坦性。
按照一种优选的设计构造，盖膜设计为透明的。盖膜相对激光辐射而言透明，该激光辐射用于焊接盖膜和基板。因此，盖膜的透明性使得盖膜能够通过激光焊接与基板焊接。因此，能够通过自动并因此廉价的制造方法实现盖膜的可靠地流体密封的固定。
按照一种优选的设计构造，基板和盖膜由相同的塑料制成，因此具有相同的熔化温度。因此简化了盖膜与基板通过激光焊接的焊接。
优选在基板远侧的连接通道和泵腔室之间分别设置有垂直通道，该垂直通道垂直于连接通道并且分别将泵腔室与连接通道连通。因为垂直通道具有与基板近侧的泵腔室和基板远侧的连接通道-槽相同的脱模方向，基板可以毫无困难地通过塑料注塑制造。
按照一种优选的设计构造，蠕动泵是微流路的蠕动泵，其中泵腔室的泵容积小于10μl。尤其在微流路的蠕动泵中，保持允许的公差在技术上非常苛刻，因此本发明尤其在微流路的蠕动泵中在制造带有这种蠕动泵的水分析装置时导致特别的简化。
水分析装置优选由具有所有电部件的基础模块和可更换的筒模块组成，该筒模块具有包含蠕动泵在内的全部流体系统。筒模块可以是一次性用品，其在用完或损坏后被更换并抛弃。
附图说明
以下参照附图详细说明本发明的实施例。
在附图中示出：
图1是水分析装置的示意图，所述水分析装置由基础模块和可更换的筒模块构成，在筒模块中布置有气动操纵的多腔蠕动泵，以及
图2是图1中的蠕动泵的纵向剖视图。
具体实施方式
在图1中以示意概略图示出了过程水分析装置10，其用于几乎连续地定量检测水11中的待检物质。水分析装置10当前完全插入要检查的水11中，因此构造为所谓的浸入式探测器。水分析装置10模块化地构造，并且由具有所有电气部件的基础模块12和可更换的筒模块14组成，该筒模块具有全部流体系统，所述流体系统当前构造为微流路的。筒模块14仅一次性使用，并且在用完或损坏后被更换并处理。
筒模块14具有载流容器16，其通过流体导管与气动驱动的多腔蠕动泵18的泵入口连通。蠕动泵18的泵出口通过流体导管与透析元件20连接，待检物在该透析元件中从水11中迁移到载流中。
透析元件20通过流体导管与测量路径22连通，其中，在该流体导管的延伸范围中加入试剂，该试剂与要确定的待检物例如发生颜色变化的反应。测量路径22配属于基础模块侧的分析装置24，该分析装置例如可以构造为光度计，并判定在测量路径22中流体的消失。接着将流体泵入到废料容器25中。
蠕动泵18的筒模块侧的部分由泵系统(Pumpmimik)构成，该泵系统的促动机构布置在基础装置12中。促动机构由过压存储器30和负压存储器32、未示出的气动泵和三个电连接的切换阀34构成，所述气动泵与过压存储器30和负压存储器32连通，并且产生所需的过压或负压，所述切换阀或者将过压存储器30，或者将负压存储器32与蠕动泵18的对应配设的泵膜连接。
在图2中详细示出了蠕动泵18。蠕动泵18具有塑料基板10，该塑料基板在其近侧具有三个球形凹槽形式的泵腔室41，42，43，所述泵腔室在近侧具有开口。在基板40的近侧44设置有流体密封并且弹性的泵膜46，该泵膜封闭三个泵腔室41，42，43的开口。泵膜46由氟化或部分氟化的弹性体制成，例如由名称为Viton的材料制成，并且具有0.1至0.4mm的厚度。泵腔室21，42，43也可以备选地分别由一个单独的单个泵膜封闭。这可以由带有边缘侧环形凸起的圆形膜形成。
在泵膜46的近端，在泵膜46上设置有盖板48，其中，盖板48具有三个气动的促动通道51，52，53，所述促动通道大致垂直于基板40的基面，分别与相关的泵腔室41，42，43对齐并且大致终止在泵腔室开口的中心。
从每个泵腔室41，42，43横向于基板40的基面分别伸出两个垂直通道60-65直至基板40的远侧。每个泵腔室41-43分别具有一个垂直流入通道60，62，64和一个垂直流出通道61，63，65。第一泵腔室41的垂直流出通道61通过水平连接通道71与第二泵腔室42的垂直流入通道42连接。第二泵腔室42的垂直流出通道63通过另一水平连接通道73与第三泵腔室42的垂直流入通道64连接。两个连接通道71，73分别作为远侧开口的槽70，72构造在基板40的远侧上。基板40的远侧在连接通道71，73的区域内由单独的槽覆盖件80覆盖，该槽覆盖件由柔性的透明盖膜80形成，并且该盖膜在远侧封闭两个连接通道-槽70，72。
基板40和盖膜80由相同的塑料制成，因此其具有相同的熔点，并且通过激光焊接或超声波焊接流体密封地相互焊接。作为备选，也可以考虑热封或热连接(Thermoboden)。
第一泵腔室41中的垂直流入通道60形成泵入口，而第三泵腔室43的垂直流出通道65形成泵出口。
通过促动通道51，52，53可以通过相应地接通对应配设的切换阀34将气动过压施加在泵膜46的近端背面上，使得相关泵腔室41，42，43的内含物被排空。通过切换切换阀34可以将来自负压存储器32的负压施加到泵膜46的近端背面上，使得其回到在图2所示的初始位置，因此相关的泵腔室41，42，43被填充。
通过填充第一泵腔室41，接着在填充第二泵腔室42的同时排空第一泵腔室41并且接着在填充第三泵腔室43的同时排空第二泵腔室42，实现流体从泵入口到泵出口的蠕动泵送。
过压存储器30中的绝对压力大约在2.0bar，而负压存储器32中的绝对压力大约为0.5bar。
泵腔室41-43的最大直径为1.0至5.0mm，垂直高度为0.1至2.0mm，因此泵腔室41-43具有分别约1.0至10μl的容积。

Claims (8)

1.一种水分析装置(10)，该水分析装置带有气动操纵的多腔室蠕动泵(18)，该多腔室蠕动泵具有：
基板(40)，在所述基板(40)的近侧带有多个近侧开口的泵腔室(41-43)；
在所述基板(40)的近侧上封闭泵腔室(41-43)的、流体密封并且弹性的泵膜(46)，以及
在所述泵膜(46)上的盖板(48)，其中，所述盖板(48)在泵腔室(41-43)的区域中分别具有一个气动的促动通道(51-53)，所述促动通道可为了操纵泵膜(46)连接在过压源(30)上，其特征在于，
两个泵腔室(41，42；42，43)之间的连接通道(71，73)在基板(40)的远侧构造为槽(70，72)，其中，在所述基板(40)的远侧在连接通道-槽(70，72)的区域中设置单独的槽覆盖件(80)，该槽覆盖件封闭所述连接通道-槽(70，72)远侧的开口侧。
2.如权利要求1所述的水分析装置(10)，其中，所述基板(40)是塑料注塑件。
3.如权利要求1或2所述的水分析装置(10)，其中，所述槽覆盖件(80)是柔性的盖膜。
4.如权利要求3所述的水分析装置(10)，其中，所述盖膜是透明的。
5.如权利要求1至4之一所述的水分析装置(10)，其中，所述基板(40)和所述盖膜(80)由相同的塑料制成并且具有相同的熔点。
6.如权利要求1至5之一所述的水分析装置(10)，其中，在所述连接通道(71，73)和泵腔室(41，43)之间分别设置有垂直通道(61-64)，所述垂直通道垂直于所述连接通道(71，73)。
7.如权利要求1至6之一所述的水分析装置(10)，其中，所述蠕动泵(18)是微流路的蠕动泵(18)，并且泵腔室(41-43)的泵容积小于10μl。
8.如权利要求1至7之一所述的水分析装置(10)，其中，所述水分析装置(10)由具有所有电部件的基础模块(12)和可更换的筒模块(14)组成，该筒模块具有包含蠕动泵(18)在内的全部流体系统。
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