CN103269731B - 用于基于管材料性能来提高蠕动泵系统的精确度的方法 - Google Patents

用于基于管材料性能来提高蠕动泵系统的精确度的方法 Download PDF

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CN103269731B
CN103269731B CN201180053512.9A CN201180053512A CN103269731B CN 103269731 B CN103269731 B CN 103269731B CN 201180053512 A CN201180053512 A CN 201180053512A CN 103269731 B CN103269731 B CN 103269731B
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P·埃格斯
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C13/00—Adaptations of machines or pumps for special use, e.g. for extremely high pressures
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
    • A61M5/142—Pressure infusion, e.g. using pumps
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M39/00—Tubes, tube connectors, tube couplings, valves, access sites or the like, specially adapted for medical use
    • A61M39/08—Tubes; Storage means specially adapted therefor
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
    • A61M5/142—Pressure infusion, e.g. using pumps
    • A61M5/14212—Pumping with an aspiration and an expulsion action
    • A61M5/14228—Pumping with an aspiration and an expulsion action with linear peristaltic action, i.e. comprising at least three pressurising members or a helical member
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B43/00—Machines, pumps, or pumping installations having flexible working members
    • F04B43/0009—Special features
    • F04B43/0054—Special features particularities of the flexible members
    • F04B43/0072—Special features particularities of the flexible members of tubular flexible members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B43/00—Machines, pumps, or pumping installations having flexible working members
    • F04B43/12—Machines, pumps, or pumping installations having flexible working members having peristaltic action
    • F04B43/1253—Machines, pumps, or pumping installations having flexible working members having peristaltic action by using two or more rollers as squeezing elements, the rollers moving on an arc of a circle during squeezing
    • F04B43/1261—Machines, pumps, or pumping installations having flexible working members having peristaltic action by using two or more rollers as squeezing elements, the rollers moving on an arc of a circle during squeezing the rollers being placed at the outside of the tubular flexible member
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C11/00—Combinations of two or more machines or pumps, each being of rotary-piston or oscillating-piston type; Pumping installations
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2/00—Rotary-piston machines or pumps
    • F04C2/30—Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members
    • F04C2/34—Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in groups F04C2/08 or F04C2/22 and relative reciprocation between the co-operating members
    • F04C2/344—Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in groups F04C2/08 or F04C2/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C5/00—Rotary-piston machines or pumps with the working-chamber walls at least partly resiliently deformable
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D13/00—Pumping installations or systems
    • F04D13/02—Units comprising pumps and their driving means
    • F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
    • F04D13/08—Units comprising pumps and their driving means the pump being electrically driven for submerged use
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D13/00—Pumping installations or systems
    • F04D13/12—Combinations of two or more pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D3/00—Axial-flow pumps
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49229—Prime mover or fluid pump making
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49229—Prime mover or fluid pump making
    • Y10T29/49236—Fluid pump or compressor making
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49428—Gas and water specific plumbing component making
    • Y10T29/49435—Flexible conduit or fitting therefor
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49428—Gas and water specific plumbing component making
    • Y10T29/4944—Return connector device making

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Abstract

一种用于形成蠕动泵盒的方法，包括根据各个管段的物理特性将管段切割至不同长度。尺寸的差异抵消了管的物理参数差异并且提高在使用盒的蠕动泵中的精确度。

Description

用于基于管材料性能来提高蠕动泵系统的精确度的方法
技术领域
本发明涉及一种提高蠕动泵的精确度的方法。更具体地，本发明涉及一种用于降低因管的物理参数而导致泵输出变化的方法。
背景技术
蠕动泵由于其输送相对高精确度的给药剂量的能力而广泛用于各种设备中。蠕动泵通常使用具有壁的弹性管，壁限定出具有在特定承受范围内的直径的流体流动腔。管通常使用硅树脂或类似聚合物制成，这允许压缩并相对快速地恢复到管的原始形状。在流体输送过程中，管保持与泵构件接合，泵构件有选择地压缩管的一部分以从流体流动腔的一部分中排出液体，并推动流体穿过腔下游。一旦泵构件与管的部分脱开，管恢复到其原始形状，并且腔充满附加流体。
在线性或曲线蠕动泵中，大致如图1A中的10所示，管件14可围裹或拉伸绕过多个连接构件或泵爪18。连接构件18继而延伸进入管14以塌缩管并向下游推动流体。随着连接构件18缩回，弹性管14回到其正常横截面，以此允许腔盛满将在下一个循环中被推动的流体。由连接部件18塌缩的管14段提供相对已知的腔中的溶液体积。因此,连接部件的每个循环推动一定量的流体并且多次重复循环将输送所需的剂量。曲线泵的操作的更具体说明可见于美国专利6,164,921。
在转动式蠕动泵中，如图1B所示，管14通常锚固在泵体20的相对两端14a和14b。锚固可通过连接弹性管14至其它管的连接件24完成。（硅树脂管通常比其它类型的管更贵，所以仅在位于泵上的部分使用硅树脂管是经济的做法）。在相对端14a和14b之间，管被围绕在具有多个连接构件或辊子38、38a、38b的转子28周围。随着辊子绕着转子移动，辊子将挤压管并塌缩腔（如辊子38a所示的）。这导致相对已知的流体量被布置在辊子38a和38b之间的管部分14c的腔中。随着辊子38a继续移动进入辊子38所示的位置，辊子塌缩管并推动腔中的流体向前。因此每个转子28的第三次旋转都向下游输送大致已知量的流体。因此，使用者可通过简单地控制转子转动次数来获得所需剂量。转动式蠕动泵的更详细功能可见于美国专利5,720,721。
尽管蠕动泵是相对精确的，但是它们的精确度很大程度上取决于管的物理性能和沿着管的物理状态。例如，美国专利5,720,721中教导置于转子上游和下游的多个压力传感器42以探测管内的压力变化，压力变化可影响管每次转动推动的流体量。气泡探测器46也可被用于确保适量的液体被推动和/或不存在不期望的空气等等。
除了管中的压力和被泵出的流体内的材料之外，管自身的物理参数也对精确度有影响。这些物理参数可包括限定出腔的壁的厚度、腔的直径（即管的内径）、管的长度和管的材料性能，例如硬度计等级（总体与管的压缩性能相关）和杨氏模量（总体与管的拉伸性能相关）。
各个物理参数或性能能够影响泵输送的流体的精确度。例如，如果管具有比另一个管大的内径，由于更大的横截面区域，它将随着蠕动泵的每个循环运送较大体积的流体。同样地，管的塌缩性的变化将影响随着泵的每个循环通过管的溶液量。此外，长度是重要的，因为拉伸管将自然地减少管的内径，并且减少随着每个泵循环推动的流体量。然而，更易拉伸的管实际上可随着每个循环输送稍高的流体量。
因为管的物理参数对通过泵的实际流量有显著影响，常见的是对于制造用于医用泵或其它泵的蠕动泵盒或供给管路要求高度精确度以要求管原料在一定参数内。例如，制造场内饲喂泵盒或注射泵盒的公司可采购管并要求其被交付时具有长5英寸±0.040英寸、具有0.200英寸±0.003英寸的外径、0.120英寸±0.003英寸的内径并具有邵氏硬度50±5的硬度计等级。
在管规格中所允许的变化相对较小时，各个变化具有对泵的容积精确度的影响。例如，管壁厚度的不同可产生在输出值中2%的不同。同样地，管的硬度计等级或杨氏模量的不同可产生在输出值中2%的不同。当各个变化叠加时，管的差异可产生在泵的总输出流量中5-10%之间的不同。
需要理解的是泵的精确度可通过进一步减少管必须符合的公差而增加，这需要生产商提供更接近符合公差的管，这通常导致更高的管采购价格，因此对于终端用户增加了蠕动泵设备的价格。
因此，当对于在使用符合预定参数组的管时，提高了蠕动泵的精确度的方法的需要。
发明内容
根据本发明的主旨，已经发现可通过至少部分根据物理特性，而不是在环境状态下的一系列预定长度切割管，来实现在蠕动泵中流体输送中的精确度的提高。
根据本发明的一个方面，管受到预定或已知的力而拉伸。拉伸的管之后被切割至预定长度并释放。一旦释放，管回到非拉伸状态。具有各种不同直径和弹性的管将具有稍微不同的长度。然而，结合到饲喂盒的管提供更稳定的剂量，因为管的物理性能改变至少部分由长度的不同抵消。
根据本发明的一个方面，管被批量地提供。管被支撑，并且预定长度的管延伸超过支撑件。管之后被预定或已知力拉伸并切割（例如，在6英寸拉伸处切割），使得当管在环境状态下恢复其长度时，管的切割部分为所需长度（例如，5英寸±1英寸）。因为将拉伸更多，具有更强拉伸能力的管可在环境状态下为4.9英寸，而拉伸力较弱的管可在环境状态下为5.1英寸。然后管段与泵盒相连来使用，长度的不同抵消了管的其它物理参数的差异。需要理解的是，在此使用的泵盒可指代饲喂或注射设备的一部分，部分包括蠕动回路的泵管段、沿着泵机构安装的线形泵管段、或与蠕动泵接合的其它泵管段。
根据本发明的一个方面，管首先安装在泵盒的一端处。然后管在已知力下拉伸并在预定或已知长度处切割。在管回缩到其环境长度之前或之后，管的切割端与在泵盒上的另一个连接件相连。
根据本发明的另一个方面，管安装或支撑在一端处并且在由管的已知物理参数决定的预定力下拉伸，例如，管的杨氏模量或硬度计等级、精确的管尺寸等等。
根据本发明的另一个方面，管在变化的力下拉伸至预定长度。力需要实现所期望的拉伸，并且基于根据需要来得到所期望的长度的力切割管。切割管段然后装在泵盒上并在蠕动泵中使用。不同的管长度帮助抵消管中的差异。切割可在将管从原料中牵拉时进行，并且管在一端处被支撑，或管的一端可与泵盒的一部分相连，并且被拉伸并切割，并且然后安装至盒的相对一端。
根据本发明的另一个方面，管在变化的力下拉伸至预定长度。力需要实现所期望的拉伸度，并且结合根据管的至少一个已知物理参数的信息，例如管的杨氏模量或硬度计等级、精确的管尺寸等等，并且然后确定切割位置并切割管。
如下文结合附图所描述的那样，本发明的这些以及其它方面可在提高蠕动泵精确度的方法中实现。
附图说明
本发明的各种实施例将结合带有附图标记的附图进行说明，其中：
图1A示出了根据现有技术的教导形成的曲线形蠕动泵的侧视、部分剖视图；
图1B示出了根据现有技术的教导形成的转动式蠕动泵的俯视图；
图2示出了形成在蠕动泵中使用的管段的方法的流程图；
图3示出了批量管的原料和根据本发明原理所切割的管段；
图4A和4B分别示出了根据本发明原理被切割的管段和用于转动式蠕动泵和线形泵和曲线形泵的蠕动泵盒的其它部分；
图5示出了根据本发明原理的形成用于提高蠕动泵精确度的管段的方法的流程图；
图6示出了根据实现预定长度所需的压力在不同位置被切割的管；以及
图7A和7B示出了根据图6中所示的方法形成的蠕动泵部件。
需要理解的是，附图仅作说明使用而不限定本发明的范围，本发明的范围仅由附加权利要求限制。所示的实施例实现了本发明的各个方面和目标。需要理解的是，不可能在单一图中清晰示出本发明的每个部件和方面，并且因此多个图分别更清晰地展示本发明的不同细节。类似地，不是每个实施例都需要实现本发明的所有优点。
具体实施方式
现将结合附图标号讨论本发明及其附图，以使本领域技术人员可实施本发明。附图及描述是本发明的不同方面的实施例，并且不旨在局限权利要求中的范围。
现参考图2，如图所示为形成在蠕动泵中使用的管段的方法的流程图。方法的第一步是选择在总公差内的原料管。例如，肠内饲喂泵盒的生产商可订购具有0.200英寸±0.003英寸的外径和0.120英寸±0.003英寸的内径且具有邵氏硬度50±5硬度等级的管。
弹性管的选择原料可以成卷的形式或按规格裁切段的形式。无论何种，管应大致符合生产商规定的公差规格。在实施本发明的步骤之前将允许管在给定的准确范围内。
一旦原料被选定，管被支撑或锚固。这可以通过将管连接至支撑件或通过将管连接至连接件、例如蠕动泵盒的连接件或转接器来完成。
一旦管被支撑或锚固，管可受到预定力以拉伸管。例如，施加五磅力到约5.5英寸长的管段上使得管被拉伸至约6.5英寸。根据管的物理特性，拉伸管段的实际长度可为6.3英寸的一段管段和6.7英寸且具有不同物理特性的另一段管段。这类型的差异在内部大批量（inter-lotruns）中很常见，但甚至可由于不良的生产质量控制或特定环境因素而发生在内部大批量（intra-lotruns）中。
然后拉伸的管以预定长度切割。如果需要五英寸长的管，拉伸的管可在距离支撑处或锚固处或距离拉伸端起6英寸的位置处切割。（显然，如果切割从支撑端起进行，管也将在支撑处被切割以提供切割拉伸管段）。一旦切割，管可允许恢复到其非拉伸的取向。在环境状态下，比一般管段更能够拉伸的管段将稍小于五英寸（例如4.9-4.999），并且比一般更不容易拉伸的管段将稍大于五英寸（例如5.001至5.1英寸）。因此，由切割管段制成的饲喂或注射盒将具有稍微不同的管长度。然而，因为长度的不同与管的物理参数有关，盒具有更高的精确度，因为管长度的差异帮助抵消管的其它参数的差异。例如，如果上文确定的公差导致在流量精确度的百分之六的差异，根据本发明的方法形成饲喂盒可能具有百分之四点五的流量精确度差异。因此，精确度差异减少了百分之二十五而不需任何原料中的差异的降低。
作为对上述的替代，管可在已知力下被拉伸，已知力至少部分根据管的已知物理参数被选择，物理参数的例子例如管的杨氏模量或硬度计等级、管的准确尺寸等等。例如，如果管具有已知邵氏硬度80，管可在力A下被拉伸，而具有邵氏硬度70的管可在力B下被拉伸。可制作表格以提供根据实验检验的所需调整以提供用于已知物理参数的所需的力。
现参照图3，如图所示是批量管114的原料110。如前文提到的，管可以成卷形式或按规格裁切段的形式。管114可在管段114a的一端处与支撑件或锚固件118相连，并且在相反端处与力施加器122相连。力施加器122可以是任何类型的拉力（如箭头126所示）的机构以拉伸管段114a。这些可包括传动活塞、弹簧、或甚至简单重物。仅作为举例，施加在管段114a上的拉力可以为1-10磅，同时4-6磅的力是用于具有上述讨论的规格的管的肠内饲喂泵盒所需的范围。
管段114a被拉伸到长度L1，长度可能因为管物理特性的差异而在每个管段之间稍有不同。在一个样品组的管中的差异的范围在0.04英寸每英寸管的区域内。一旦管段114a被拉伸，切割设备130被用于在预定位置切割管。切割可在距与力施加器122相连的远端预定距离处，因此形成切割管段。在可选实施例中，管段可在距离支撑件或锚固件118预定长度处切割，如L2所示，并且也在支撑件或锚固件处切割。需要理解的是，如果管段114a仅被拉伸使得切割管段为所需长度，L1和L2可以是相等长度。
一旦管段114a被切割，施加在管段上的力可被移除，并且它们将恢复至环境状态，如114b所示。六英寸拉伸管段可为大约例如4.9至5.1英寸，并且被使用以形成饲喂泵盒，注射泵盒等等。管段在一般环境状态下（即没有纵向拉伸）通常安装在泵盒内，在有些应用中管段可在泵盒内被预拉伸。
如在此使用的那样，盒可包括用于转动式蠕动泵的管段，转动式蠕动泵通常包括安装在连接件上的管段114b的一端，连接件的位置彼此相邻，使得管段形成大体U形（至少当其安装在泵上时）。然而，对于线形泵，盒可简单地是管在每一端安装至一个连接件上。术语“盒”应被视为覆盖在蠕动泵中使用的这样结构及其它结构。
现参照图4A和4B，如图所示为被切割的管段114a和根据本发明的蠕动泵盒的其它部分，管段114a可在第一端114d与连接件140（图4A）、160（图4B）相连，由此分别形成饲喂泵盒144、164的一部分。连接件140、160的一部分通常延伸进入管段114a，并由虚线示出。
盒连接器140、160可被保持，并且管段114a可受到已知力,例如重物122。已知力可以是例如4至6磅之间。管段114可由切割机构130在距连接件140预定距离处切割。切割段114e可与另一连接件150相连，由此形成蠕动泵盒管环。
在盒144可作为转动式蠕动泵盒时，其它构造也可被制造。例如，对于线形或曲线形蠕动泵，连接件160、170通常被置于管段114a的相对端，如图4B所示。连接件160、170可安装在线形或曲线形泵机构的相对侧以牢固地保持管段114a，同时由泵机构在其上起作用。
图5所示是形成用于提高根据本发明的主旨的蠕动泵的管段的精确度的可替代方法。原料管可被支撑或锚固。这可以通过连接管的一端至连接件或通过支撑或锚固来自批量管的管段来进行。然后，管段在所需管段的适当相对端之外被抓取，并且施加力直到管段达到预定长度。测量器或应变计测量得到所需长度需要的力的大小。管接着在与得到预定长度所需的力的大小相关联的位置处被切割。
现参照图6，如图所示是根据达到预定长度的压力的不同位置处切割的管。原料110可被用于供给管114。原料可以是成卷的管，或者可以是笔直管件。在此的任何例子中的原料甚至可以是刚刚挤制的管。
管段114b可被支撑件或锚固件118捕获。如先前所述，这可在之后被切割的连续管件上进行，或管的一端可安装在锚固件上，例如蠕动泵盒的连接件。管段114a的自由端（或远点）由力施加器122固定，力施加器122施加的力由箭头126指代。管拉伸至预定长度L3，长度L3可以是例如5.5英寸。拉伸管段114a至所需长度需要的力可由测量器或应变计134监控。切割机构130的位置可根据拉伸管段114a至所需长度需要的力而调整，并且切割机构切割管段。如果管段的相对一端114a还没有被切割，比如装在支撑件或锚固件上的件，相对一端例如通过支撑件或锚固件118被切割。切割的管段114b可以先于连接到盒的连接件等之前恢复到它们的环境长度。
作为上述的替代，管可拉伸到至少部分根据管的物理特性被选择的已知长度，物理特性的例子如，管的杨氏模量或硬度计等级，精确的管尺寸等。例如，如果管具有已知邵氏硬度80，管可延伸至长度A，同时具有已知邵氏硬度70的管可延伸至长度B。可制作表格以提供根据实验检验的所需调整以提供用于已知物理参数的所需的力。
现参照图7A和7B，如图所示为用于转动式蠕动泵和线性或曲线蠕动泵的蠕动泵盒144、164。在每个构造中，管段114a的自由端114d可与被支撑或保持在所需位置上的连接器140、160相连。管段114a可被力施加器122拉伸，以拉伸管段至预定长度。用于拉伸管段114a所需要的力的大小由测量器或应变计134测量。
切割机构130然后被调整以在用于拉伸管至所需长度所需要的力相关的长度切割。因此，例如，管段可依靠仅4磅的拉力得到预定长度。切割机构130可被移动至位置A并进行切割。与此相反，另一个管段（来自另一批或者甚至内部批量）可能要求5磅的压力以拉伸管至所需长度。这可与被移动至距离管的端部稍远的位置并且之后进行切割的切割机构130有关。这导致管段114a的长度稍有不同。长度的不同帮助最小化在得到管的公差内的管之间的精确度差异。不同长度的管段114a减小泵盒144、164中的精确度差异。
需要理解的是，用于形成蠕动泵盒的方法可包括：施加预定力以拉伸管段；以预定长度切割管段；将管段连接到至少一个连接器以形成蠕动泵盒。方法也可能包括：使管段受到在4至6磅之间的力；切割管段使得在环境状态下管段在4.9英寸至5.1英寸之间；管段具有约为0.200英寸±0.003英寸的外径和约为0.120英寸±0.003英寸的内径；管段的一端在拉伸之前与连接件相连；管段从大批量原料中被拉制出；管段在拉伸之前在一端处被支撑或锚固；批量原料是在预定变化范围内的成卷的管；和/或管段在施加预定力之前与连接件相连，或任何它们的组合。
类似地，用于形成蠕动泵盒的方法可包括：向管段施加力以拉伸管段至预定长度；在与拉伸管段至预定长度所需的力相关的位置处切割管段；并且将管段连接至至少一个连接件以形成蠕动泵盒。方法也可包括：使管段受到在4至6磅之间的力；切割管段使得在环境状态下管段在4.9英寸至5.1英寸之间；管段具有约为0.200英寸±0.003英寸的外径和约为0.120英寸±0.003英寸的内径；管段的一端在拉伸之前与连接件相连；管段从批量原料中拉制出；管段在拉伸之前在一端处被支撑或锚固；批量原料是在预定变化范围内的成卷的管；和/或管段在施加预定力之前与连接件相连，或任何它们的组合。
类似地，一种提高泵盒的精确度的方法可包括：选择成批量的管；拉伸出管段；切割管段；并且将管段的至少一端连接至连接件以形成泵盒。方法还包括：在拉伸管段之前，将管段与泵盒的连接件相连；在预定力下拉伸管段；和/或管段拉伸至预定长度，或任何的它们组合。
因此，本发明公开了一种用于形成肠内饲喂和注射泵盒的改进方法。需要理解的是可对本发明进行许多改变而不偏离本发明的范围。

Claims (20)

1.一种用于形成蠕动泵盒的方法，所述方法包括：
将至少一个连接件连接到管段；
施加预定力以拉伸已连接的所述管段；
以预定长度切割已连接的所述管段；以及
将所述至少一个连接件和所述管段连接到蠕动泵盒。
2.根据权利要求1所述的方法，其特征在于，所述方法包括使所述管段受到在4磅至6磅之间的力的作用。
3.根据权利要求1所述的方法，其特征在于，所述方法包括切割所述管段，使得在周围环境状态下的所述管段在4.9英寸至5.1英寸之间。
4.根据权利要求1所述的方法，其特征在于，所述管段具有0.200英寸±0.003英寸的外部直径和0.120英寸±0.003英寸的内部直径。
5.根据权利要求1所述的方法，其特征在于，所述管段在管的一端处连接至所述至少一个连接件。
6.根据权利要求1所述的方法，其特征在于，从批量原料拉制出所述管段，并且其中所述管段在拉伸之前在一端处被支撑或锚固。
7.根据权利要求6所述的方法，其特征在于，所述批量原料是在预定变化范围内的成卷的管。
8.根据权利要求1所述的方法，其特征在于，所述预定长度至少部分地根据所述管段的物理特性。
9.一种用于形成蠕动泵盒的方法，所述方法包括：
将连接件连接到管段；
向已连接的所述管段施加力以将所述管段拉伸至预定长度；
在与将所述管段拉伸至所述预定长度所需的力相关联的位置处切割已连接的所述管段；以及
将所述连接件和所述管段连接至蠕动泵盒。
10.根据权利要求9所述的方法，其特征在于，所述方法包括使所述管段受到在4磅至6磅之间的力的作用。
11.根据权利要求9所述的方法，其特征在于，所述方法包括切割所述管段，使得在周围环境状态下的所述管段在4.9英寸至5.1英寸之间。
12.根据权利要求9所述的方法，其特征在于，所述管段具有0.200英寸±0.003英寸的外部直径和0.120英寸±0.003英寸的内部直径。
13.根据权利要求9所述的方法，其特征在于，在拉伸之前将所述管段在管的一端处连接到连接件。
14.根据权利要求9所述的方法，其特征在于，从批量原料拉制出所述管段，并且其中所述管段在拉伸之前在一端处被支撑或锚固。
15.根据权利要求14所述的方法，其特征在于，通过支撑件或锚固件来将所述管段连接到所述连接件。
16.根据权利要求14所述的方法，其特征在于，所述批量原料是在预定范围变化内的成卷的管。
17.一种用于提高泵盒中的精确度的方法，方法包括：
选择批量的管；
将第一连接器连接至所述管的第一端；
拉伸已附接的所述管的一管段；
切割已附接的所述管段；以及
通过将所述管的第二端与第二连接件相连以形成所述泵盒。
18.根据权利要求17所述的方法，其特征在于，在预定力下拉伸所述管段。
19.根据权利要求17所述的方法，其特征在于，将所述管段拉伸至预定长度。
20.根据权利要求1所述的方法，其特征在于，所述预定长度至少部分地根据所述管段的物理特性。
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