WO2015143809A1 - 一种稀释设备及方法 - Google Patents

一种稀释设备及方法 Download PDF

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Publication number
WO2015143809A1
WO2015143809A1 PCT/CN2014/083209 CN2014083209W WO2015143809A1 WO 2015143809 A1 WO2015143809 A1 WO 2015143809A1 CN 2014083209 W CN2014083209 W CN 2014083209W WO 2015143809 A1 WO2015143809 A1 WO 2015143809A1
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peristaltic pump
dilution
pump
bottle
tube
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PCT/CN2014/083209
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English (en)
French (fr)
Inventor
黄晓平
郑俭锋
高丹
钟笑颜
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深圳市清时捷科技有限公司
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Publication of WO2015143809A1 publication Critical patent/WO2015143809A1/zh

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00—Sampling; Preparing specimens for investigation
    • G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
    • G01N1/38—Diluting, dispersing or mixing samples
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D11/00—Control of flow ratio
    • G05D11/02—Controlling ratio of two or more flows of fluid or fluent material
    • G05D11/13—Controlling ratio of two or more flows of fluid or fluent material characterised by the use of electric means
    • G05D11/131—Controlling ratio of two or more flows of fluid or fluent material characterised by the use of electric means by measuring the values related to the quantity of the individual components
    • G05D11/132—Controlling ratio of two or more flows of fluid or fluent material characterised by the use of electric means by measuring the values related to the quantity of the individual components by controlling the flow of the individual components

Definitions

  • the present invention relates to a dilution apparatus, and more particularly to a peristaltic pump type dilution apparatus and method.
  • Accurate dilution refers to the process of adding a certain volume of solvent to a volume of stock solution to obtain an accurate target solution.
  • Some adopt manual dilution method professional chemical inspectors use the accurate measuring device such as pipette and volumetric flask to accurately dilute the original liquid to the target liquid. This process requires high requirements for the laboratory test of the laboratory technician, and has many operation steps and long consumption time. Manual calculations often result in unacceptable accuracy and accuracy of the dilution results.
  • the weight dilution method is mainly used on the market: the weight of the stock solution and the weight of the added solvent are measured by the balance, and the dilution factor is set. Dilute. This is a method of gravimetric analysis, but since the density of the stock solution and solvent is affected by concentration and temperature, the repeatability is 1%, and it is impossible to break through to higher precision.
  • the technical problem to be solved by the present invention is to provide a dilution device and method, which not only has higher dilution precision, but also has simple and convenient operation and low equipment cost.
  • the present invention provides a dilution device comprising a solvent bottle, a raw liquid bottle, a dilution bottle, a first peristaltic pump, a second peristaltic pump, a pump tube, and a control device, and the first peristaltic pump is filled with liquid.
  • the mouth is connected to the solvent bottle through the pump tube, and the liquid outlet of the first peristaltic pump is connected to the dilution bottle through the pump tube; the inlet of the second peristaltic pump is connected to the raw liquid bottle through the pump tube, and the outlet of the second peristaltic pump is passed through the pump tube
  • the first peristaltic pump and the second peristaltic pump are respectively electrically connected to the control output of the control device, and the control device is further provided with a temperature sensor for immersing in the solution for detecting the temperature of the solution.
  • a bracket is further provided, and the bracket is provided with a chuck, and an end of the pump tube and the connection end of the dilution bottle is fixed on the chuck.
  • a drain tube is disposed in the dilution bottle, and an upper end of the drain tube is connected to the pump tube.
  • an alarm device connected to the control device is further included.
  • the alarm device is a horn or an alarm light or a vibrator.
  • the present invention also proposes a dilution method, comprising the following steps:
  • Step 4 diluting, calculating the operating time T1 of the first peristaltic pump and the second peristaltic pump according to the concentration of the original solution, the concentration of the target liquid, the volume of the target liquid, the flow rate value q1 of the first peristaltic pump, and the flow rate value q2 of the second peristaltic pump.
  • the running time T2; the control device controls the first peristaltic pump working T1 time and the second peristaltic pump working T2 time respectively to achieve the purpose of automatic and continuous dilution.
  • the method further includes the step 1, the control device respectively controls the first peristaltic pump and the second peristaltic pump to work, so that the solvent and the original liquid fill the entire pump tube without generating bubbles, and ensure that the entire pump tube is filled with liquid. .
  • the method further includes the step 5, wherein the control device controls the alarm device to alert the alarm. .
  • the invention obtains the temperature information of the pure water in the solvent bottle and the original liquid bottle through the temperature sensor, accurately calibrates the flow rate of the first peristaltic pump and the second peristaltic pump, and then passes through the dilution work.
  • the control device controls the working state and operating parameters of the first peristaltic pump and the second peristaltic pump, because the repeatability deviation of the peristaltic pump in removing 50 ml of the solution is only ⁇ 0.08% It is better than the volume deviation ( ⁇ 0.1%) of the 50ml class A volumetric flask, so the dilution precision is higher, and the dilution operation can be continuously performed, which is not only simple and convenient to operate, but also low in equipment cost.
  • Figure 1 is a schematic view showing the structure of a dilution apparatus of the present invention.
  • the dilution apparatus of the embodiment of the present invention includes a solvent bottle 1, a raw liquid bottle 2, a dilution bottle 3, a first peristaltic pump 4, a second peristaltic pump 5, a pump tube 6, a control device 7, a support 9, and drainage.
  • the liquid inlet of the first peristaltic pump 4 is connected to the solvent bottle 1 through the pump tube 6, the liquid outlet of the first peristaltic pump 4 is connected to the dilution bottle 3 through the pump tube 6; the second peristaltic pump 5
  • the inlet is connected to the raw liquid bottle 2 through the pump tube 6, and the outlet of the second peristaltic pump 5 is connected to the dilution bottle 3 through the pump tube 6; the first peristaltic pump 4 and the second peristaltic pump 5 are electrically connected to the control output of the control device 7, respectively.
  • the control device 7 is further provided with a temperature sensor 8 for immersing in the solution for detecting the temperature of the solution.
  • the flow rates of the first peristaltic pump 4 and the second peristaltic pump 5 need to be calibrated.
  • pure water is poured into the solvent bottle 1 and detected by the temperature sensor 8.
  • the temperature of the pure water in the solvent bottle 1 and record the density ⁇ 1 of the pure water at the temperature, and then start the operation of the first peristaltic pump 4, record the operation time t1 of the first peristaltic pump 4, and accurately weigh the first peristalsis through the balance and the measuring cup.
  • the control device 7 can directly control the operating state and operating parameters of the first peristaltic pump 4 and the second peristaltic pump 5.
  • the bracket 9 is provided with a chuck 10, and the end of the connection end between the pump tube 6 and the dilution bottle 3 is fixed on the chuck 10, so that the pump tube 6 can be firmly fixed at the bottle mouth of the dilution bottle 3, so as to avoid being avoided during dilution.
  • the pump tube 6 is shaken due to the impact force generated when the fluid in the tube flows out, and even the fluid is spilled out of the dilution bottle 3, which affects the dilution precision.
  • the drainage tube 11 is disposed in the dilution bottle 3, and the upper end of the drainage tube 11 is connected with the pump tube 6, so that the fluid can be slowly drained into the dilution bottle 3 to prevent the fluid from impacting the liquid surface and splashing out of the dilution bottle 3, thereby affecting the dilution precision.
  • the length of the drainage tube 11 is about 5 cm, which makes it easy to remove the dilution bottle.
  • the alarm device is connected to the control device 7.
  • the alarm device is a horn, and may also be an alarm light or a vibrator. After the dilution is completed, the control device 7 controls the horn to sound an alarm to remind the staff that the dilution work is over.
  • the first peristaltic pump 4 and the second peristaltic pump 5 pump fluid by alternately squeezing and releasing the flexible delivery hose of the pump, the flow rate of the fluid depending on the rotational speed of the pump head and the size of the "pillow", the rotor
  • the product of the three parameters of the number of "pillows” produced per revolution, "pillow” refers to the “pillow” shaped fluid formed by a section of pump tube 6 between the two rollers.
  • the invention obtains the temperature information of the pure water in the solvent bottle 1 and the original liquid bottle 2 through the temperature sensor 8, and accurately calibrates the flow rates of the first peristaltic pump 4 and the second peristaltic pump 5, and then controls the control device 7 in the dilution operation.
  • the working state and operating parameters of the first peristaltic pump 4 and the second peristaltic pump 5 are only ⁇ 0.08% due to the repeatability deviation of the peristaltic pump in the removal of 50 ml of the solution. It is better than the volume deviation ( ⁇ 0.1%) of the 50ml class A volumetric flask, so the dilution precision is higher, and the dilution operation can be continuously performed, which is not only simple and convenient to operate, but also low in equipment cost.
  • Step 2 formulate and calibrate the first peristaltic pump 4: pour pure water into the solvent bottle 1, and use the temperature sensor 8 to detect the temperature of the pure water in the solvent bottle 1, and record the density ⁇ 1 of the pure water at the temperature, and then start the first
  • Step 3 formulating and calibrating the second peristaltic pump 5: pouring pure water into the original liquid bottle 2, detecting the temperature of the pure water in the original liquid bottle 2 with the temperature sensor 8, and recording the density ⁇ 2 of the pure water at the temperature, and then starting the first
  • Step 4 diluting, calculating the operation time T1 and the first operation of the first peristaltic pump 4 according to the stock solution concentration, the target liquid concentration, the target liquid volume, the flow rate value q1 of the first peristaltic pump 4, and the flow rate value q2 of the second peristaltic pump 5.
  • the operation time T2 of the peristaltic pump 5; the control device controls the first peristaltic pump 4 to operate the T1 time and the second peristaltic pump 5 to operate the T2 time, respectively, to achieve the purpose of automatic and continuous dilution.
  • the method further includes the step 1, the rinsing pipeline, and the control device 7 respectively controls the first peristaltic pump 4 and the second peristaltic pump 5 to work, so that the solvent and the original liquid fill the entire pump tube. 6 and no bubbles are generated, and the entire pump tube 6 is filled with liquid.
  • the rinsing pipeline can fully discharge the air bubbles and impurities in the pump tube 6, and does not pollute the fluid in the tube, and the precision is higher.
  • the method further includes the step 4, the control device 7 controls the alarm device alarm reminder, so that the staff member can be notified in time, the dilution work has ended, and the use is more convenient.

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Abstract

一种稀释设备，包括溶剂瓶、原液瓶、稀释瓶、第一蠕动泵、第二蠕动泵、泵管以及控制装置，第一蠕动泵的入液口通过泵管与溶剂瓶连通，第一蠕动泵的出液口通过泵管与稀释瓶连通；第二蠕动泵的入口通过泵管与原液瓶连通，第二蠕动泵的出口通过泵管与稀释瓶连通；第一蠕动泵、第二蠕动泵分别与控制装置的控制输出端电连接，控制装置上还设有用于浸入溶液中用于检测溶液温度的温度传感器。该装置不仅稀释精度更高，而且操作简单、方便、设备成本低。

Description

一种稀释设备及方法
技术领域
本发明涉及一种稀释设备，尤其涉及一种蠕动泵式的稀释设备及方法。
背景技术
准确稀释是指在一定体积原液中加入一定体积的溶剂，得到一准确目标液的过程。有的采用人工稀释的方法：专业化学检验人员使用移液管、容量瓶等准确量器将原液准确稀释至目标液，此过程对化验员的操作化验水平要求高，操作步骤多、消耗时间长、需人工计算，往往会导致稀释结果的准确度和精确度不如人意；目前市面上主要采用的是重量稀释法：利用天平称量显示原液的重量和加入溶剂的重量，设置好稀释倍数后，进行稀释。这是一种重量分析方法，但由于原液和溶剂的密度受浓度和温度的影响，其重复性为1%，无法向更高的精度突破。
发明内容
本发明所要解决的技术问题在于：提供一种稀释设备及方法，不仅稀释精度更高，而且操作简单、方便，设备成本低。
为解决上述技术问题，本发明提出了一种稀释设备，包括溶剂瓶、原液瓶、稀释瓶、第一蠕动泵、第二蠕动泵、泵管以及控制装置，所述第一蠕动泵的入液口通过泵管与溶剂瓶连通，第一蠕动泵的出液口通过泵管与稀释瓶连通；所述第二蠕动泵的入口通过泵管与原液瓶连通，第二蠕动泵的出口通过泵管与稀释瓶连通；所述第一蠕动泵、第二蠕动泵分别与控制装置的控制输出端电连接，所述控制装置上还设有用于浸入溶液中用于检测溶液温度的温度传感器。
进一步地，还包括支架，所述支架上设有夹头，所述泵管与稀释瓶连接端的端部固定在所述夹头上。
进一步地，所述稀释瓶内设有引流管，所述引流管的上端与泵管连接。
进一步地，还包括与所述控制装置连接的报警装置。
进一步地，所述报警装置为喇叭或者报警灯或者振动器。
为解决上述技术问题，本发明还提出了一种稀释方法，包括如下步骤：
步骤2，制定并校准第一蠕动泵：将纯水倒入溶剂瓶中，用温度传感器检测溶剂瓶中纯水的温度，并记录该温度下纯水的密度ρ1，然后启动第一蠕动泵工作，记录第一蠕动泵的运转时间t1，通过天平和量杯准确称量第一蠕动泵输出的溶剂重量m1，计算出第一蠕动泵的流量值q1=m1/(ρ1*t1)；
步骤3，制定并校准第二蠕动泵：将纯水倒入原液瓶中，用温度传感器检测原液瓶中纯水的温度，并记录该温度下纯水的密度ρ2，然后启动第二蠕动泵工作，记录第二蠕动泵的运转时间t2，通过天平和量杯准确称量第二蠕动泵输出的溶剂重量m2，计算出第二蠕动泵的流量值q2=m2/(ρ2*t2)；
步骤4，稀释，根据原液浓度、目标液浓度、目标液体积、第一蠕动泵的流量值q1以及第二蠕动泵的流量值q2，计算出第一蠕动泵的运转时间T1和第二蠕动泵的运转时间T2；控制装置分别控制第一蠕动泵工作T1时间和第二蠕动泵工作T2时间，实现自动及连续稀释的目的。
进一步地，在所述步骤2之前，还包括步骤1，控制装置分别控制第一蠕动泵和第二蠕动泵工作，让溶剂和原液充满整个泵管且不产生气泡，并确保整个泵管充满液体。
进一步地，还包括步骤5，控制装置控制报警装置报警提醒。。
上述技术方案至少具有如下有益效果：本发明通过温度传感器获取溶剂瓶和原液瓶中纯水的温度信息，对第一蠕动泵、第二蠕动泵的流量进行精确的校准，然后在稀释工作中通过控制装置控制第一蠕动泵、第二蠕动泵的工作状态和运行参数，由于蠕动泵在移取50ml溶液的重复性偏差仅为±0.08% ，优于50mlA级品容量瓶的体积偏差（±0.1%），所以稀释精度更高，而且可连续地进行稀释操作，不仅操作简单、方便，而且设备成本低。
附图说明
图1是本发明稀释设备的结构示意图。
具体实施方式
需要说明的是，在不冲突的情况下，本申请中的实施例及实施例中的特征可以相互组合。下面结合附图对本发明做进一步描述。
如图1所示，本发明实施例的稀释设备包括溶剂瓶1、原液瓶2、稀释瓶3、第一蠕动泵4、第二蠕动泵5、泵管6、控制装置7、支架9、引流管11以及报警装置，第一蠕动泵4的入液口通过泵管6与溶剂瓶1连通，第一蠕动泵4的出液口通过泵管6与稀释瓶3连通；第二蠕动泵5的入口通过泵管6与原液瓶2连通，第二蠕动泵5的出口通过泵管6与稀释瓶3连通；第一蠕动泵4、第二蠕动泵5分别与控制装置7的控制输出端电连接，控制装置7上还设有用于浸入溶液中用于检测溶液温度的温度传感器8。
在稀释之前，需要对第一蠕动泵4、第二蠕动泵5的流量进行校准，首先，在对第一蠕动泵4进行校准时，将纯水倒入溶剂瓶1中，用温度传感器8检测溶剂瓶1中纯水的温度，并记录该温度下纯水的密度ρ1，然后启动第一蠕动泵4工作，记录第一蠕动泵4的运转时间t1，通过天平和量杯准确称量第一蠕动泵4输出的溶剂重量m1，计算出第一蠕动泵4的流量值q1=m1/(ρ1*t1)；其次，对第二蠕动泵5进行校准时，将纯水倒入原液瓶2中，用温度传感器8检测原液瓶2中纯水的温度，并记录该温度下纯水的密度ρ2，然后启动第二蠕动泵5工作，记录第二蠕动泵5的运转时间t2，通过天平和量杯准确称量第二蠕动泵5输出的溶剂重量m2，计算出第二蠕动泵5的流量值q2=m2/(ρ2*t2)。在稀释工作中，控制装置7可以直接控制第一蠕动泵4和第二蠕动泵5的工作状态和运行参数。
支架9上设有夹头10，泵管6与稀释瓶3连接端的端部固定在夹头10上，这样泵管6可以牢固的固定在稀释瓶3的瓶口处，以免在稀释时，避免泵管6由于管内流体流出时产生的冲击力而产生晃动，甚至流体洒出稀释瓶3外，影响稀释精度。
引流管11设置在稀释瓶3内，引流管11的上端与泵管6衔接，这样流体可以缓慢的被引流到稀释瓶3内，避免流体冲击液面，溅出稀释瓶3外，影响稀释精度，而且引流管11的长度约为5公分，可方便的移出稀释瓶。
报警装置与控制装置7连接，报警装置为喇叭，也可以是报警灯或者振动器，这样稀释完成后，控制装置7控制喇叭发出报警声音，提醒工作人员稀释工作结束。
工作时，第一蠕动泵4、第二蠕动泵5通过对泵的弹性输送软管交替进行挤压和释放来泵送流体，流体的流量取决于泵头的转速与“枕”的尺寸、转子每转一圈产生的“枕”的个数这三项参数之乘积，“枕”指的是在两个转辊子之间的一段泵管6形成的“枕”形流体。
本发明通过温度传感器8获取溶剂瓶1和原液瓶2中纯水的温度信息，对第一蠕动泵4、第二蠕动泵5的流量进行精确的校准，然后在稀释工作中通过控制装置7控制第一蠕动泵4、第二蠕动泵5的工作状态和运行参数，由于蠕动泵在移取50ml溶液的重复性偏差仅为±0.08% ，优于50mlA级品容量瓶的体积偏差（±0.1%），所以稀释精度更高，而且可连续地进行稀释操作，不仅操作简单、方便，而且设备成本低。
本发明实施例的稀释方法，包括如下步骤：
步骤2，制定并校准第一蠕动泵4：将纯水倒入溶剂瓶1中，用温度传感器8检测溶剂瓶1中纯水的温度，并记录该温度下纯水的密度ρ1，然后启动第一蠕动泵4工作，记录第一蠕动泵4的运转时间t1，通过天平和量杯准确称量第一蠕动泵4输出的溶剂重量m1，计算出第一蠕动泵4的流量值q1=m1/(ρ1*t1)；
步骤3，制定并校准第二蠕动泵5：将纯水倒入原液瓶2中，用温度传感器8检测原液瓶2中纯水的温度，并记录该温度下纯水的密度ρ2，然后启动第二蠕动泵5工作，记录第二蠕动泵5的运转时间t2，通过天平和量杯准确称量第二蠕动泵5输出的溶剂重量m2，计算出第二蠕动泵5的流量值q2=m2/(ρ2*t2)；
步骤4，稀释，根据原液浓度、目标液浓度、目标液体积、第一蠕动泵4的流量值q1以及第二蠕动泵5的流量值q2，计算出第一蠕动泵4的运转时间T1和第二蠕动泵5的运转时间T2；控制装置分别控制第一蠕动泵4工作T1时间和第二蠕动泵5工作T2时间，实现自动及连续稀释的目的。
作为另一种实施方式，在所述步骤2之前，还包括步骤1，润洗管路，控制装置7分别控制第一蠕动泵4和第二蠕动泵5工作，让溶剂和原液充满整个泵管6且不产生气泡，并确保整个泵管6充满液体。润洗管路可以充分排出泵管6内的气泡、杂质，不会污染管内的流体，精度更高。
作为另一种实施方式，还包括步骤4，控制装置7控制报警装置报警提醒，这样可以及时通知工作人员，稀释工作已经结束，使用更方便。
以上所述是本发明的具体实施方式，应当指出，对于本技术领域的普通技术人员来说，在不脱离本发明原理的前提下，还可以做出若干改进和润饰，这些改进和润饰也视为本发明的保护范围。

Claims (8)

  1. 一种稀释设备，其特征在于，包括溶剂瓶、原液瓶、稀释瓶、第一蠕动泵、第二蠕动泵、泵管以及控制装置，所述第一蠕动泵的入液口通过泵管与溶剂瓶连通，第一蠕动泵的出液口通过泵管与稀释瓶连通；所述第二蠕动泵的入口通过泵管与原液瓶连通，第二蠕动泵的出口通过泵管与稀释瓶连通；所述第一蠕动泵、第二蠕动泵分别与控制装置的控制输出端电连接，所述控制装置上还设有用于浸入溶液中用于检测溶液温度的温度传感器。
  2. 如权利要求1所述的稀释设备，其特征在于，还包括支架，所述支架上设有夹头，所述泵管与稀释瓶连接端的端部固定在所述夹头上。
  3. 如权利要求1所述的稀释设备，其特征在于，所述稀释瓶内设有引流管，所述引流管的上端与泵管连接。
  4. 如权利要求1所述的稀释设备，其特征在于，还包括与所述控制装置连接的报警装置。
  5. 如权利要求4所述的稀释设备，其特征在于，所述报警装置为喇叭或者报警灯或者振动器。
  6. 一种稀释方法，其特征在于，包括如下步骤：
    步骤2，制定并校准第一蠕动泵：将纯水倒入溶剂瓶中，用温度传感器检测溶剂瓶中纯水的温度，并记录该温度下纯水的密度ρ1，然后启动第一蠕动泵工作，记录第一蠕动泵的运转时间t1，通过天平和量杯准确称量第一蠕动泵输出的溶剂重量m1，计算出第一蠕动泵的流量值q1=m1/(ρ1*t1)；
    步骤3，制定并校准第二蠕动泵：将纯水倒入原液瓶中，用温度传感器检测原液瓶中纯水的温度，并记录该温度下纯水的密度ρ2，然后启动第二蠕动泵工作，记录第二蠕动泵的运转时间t2，通过天平和量杯准确称量第二蠕动泵输出的溶剂重量m2，计算出第二蠕动泵的流量值q2=m2/(ρ2*t2)；
    步骤4，稀释，根据原液浓度、目标液浓度、目标液体积、第一蠕动泵的流量值q1以及第二蠕动泵的流量值q2，计算出第一蠕动泵的运转时间T1和第二蠕动泵的运转时间T2；控制装置分别控制第一蠕动泵工作T1时间和第二蠕动泵工作T2时间，实现自动及连续稀释的目的。
  7. 如权利要求6所述的稀释方法，其特征在于，在所述步骤2之前，还包括步骤1，控制装置分别控制第一蠕动泵和第二蠕动泵工作，让溶剂和原液充满整个泵管且不产生气泡，并确保整个泵管充满液体。
  8. 如权利要求6所述的稀释方法，其特征在于，还包括步骤5，控制装置控制报警装置报警提醒。
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