CN117249875A - 用于向计量装置进行连续供应的方法和设备 - Google Patents

用于向计量装置进行连续供应的方法和设备 Download PDF

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CN117249875A
CN117249875A CN202310713499.XA CN202310713499A CN117249875A CN 117249875 A CN117249875 A CN 117249875A CN 202310713499 A CN202310713499 A CN 202310713499A CN 117249875 A CN117249875 A CN 117249875A
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metering
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M·路透
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Marco Systemanalyse und Entwicklung GmbH
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01FMEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F23/00Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
    • G01F23/30Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats
    • G01F23/64Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats of the free float type without mechanical transmission elements
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01FMEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F13/00Apparatus for measuring by volume and delivering fluids or fluent solid materials, not provided for in the preceding groups
    • G01F13/006Apparatus for measuring by volume and delivering fluids or fluent solid materials, not provided for in the preceding groups measuring volume in function of time
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01FMIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/14Mixing drops, droplets or bodies of liquid which flow together or contact each other
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29BPREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B7/00Mixing; Kneading
    • B29B7/30Mixing; Kneading continuous, with mechanical mixing or kneading devices
    • B29B7/32Mixing; Kneading continuous, with mechanical mixing or kneading devices with non-movable mixing or kneading devices
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29BPREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B7/00Mixing; Kneading
    • B29B7/30Mixing; Kneading continuous, with mechanical mixing or kneading devices
    • B29B7/58Component parts, details or accessories; Auxiliary operations
    • B29B7/60Component parts, details or accessories; Auxiliary operations for feeding, e.g. end guides for the incoming material
    • B29B7/603Component parts, details or accessories; Auxiliary operations for feeding, e.g. end guides for the incoming material in measured doses, e.g. proportioning of several materials
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29BPREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B7/00Mixing; Kneading
    • B29B7/30Mixing; Kneading continuous, with mechanical mixing or kneading devices
    • B29B7/58Component parts, details or accessories; Auxiliary operations
    • B29B7/72Measuring, controlling or regulating
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01FMEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F13/00Apparatus for measuring by volume and delivering fluids or fluent solid materials, not provided for in the preceding groups
    • G01F13/008Apparatus for measuring by volume and delivering fluids or fluent solid materials, not provided for in the preceding groups taps comprising counting- and recording means
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01FMEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F15/00Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
    • G01F15/02Compensating or correcting for variations in pressure, density or temperature
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01FMEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F15/00Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
    • G01F15/07Integration to give total flow, e.g. using mechanically-operated integrating mechanism
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01FMEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F15/00Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
    • G01F15/18Supports or connecting means for meters
    • G01F15/185Connecting means, e.g. bypass conduits
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01FMEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F15/00Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
    • G01F15/001Means for regulating or setting the meter for a predetermined quantity
    • G01F15/003Means for regulating or setting the meter for a predetermined quantity using electromagnetic, electric or electronic means
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01FMEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F15/00Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
    • G01F15/005Valves
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01FMEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F15/00Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
    • G01F15/07Integration to give total flow, e.g. using mechanically-operated integrating mechanism
    • G01F15/075Integration to give total flow, e.g. using mechanically-operated integrating mechanism using electrically-operated integrating means
    • G01F15/0755Integration to give total flow, e.g. using mechanically-operated integrating mechanism using electrically-operated integrating means involving digital counting
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01FMEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F3/00Measuring the volume flow of fluids or fluent solid material wherein the fluid passes through the meter in successive and more or less isolated quantities, the meter being driven by the flow
    • G01F3/02Measuring the volume flow of fluids or fluent solid material wherein the fluid passes through the meter in successive and more or less isolated quantities, the meter being driven by the flow with measuring chambers which expand or contract during measurement
    • G01F3/04Measuring the volume flow of fluids or fluent solid material wherein the fluid passes through the meter in successive and more or less isolated quantities, the meter being driven by the flow with measuring chambers which expand or contract during measurement having rigid movable walls
    • G01F3/14Measuring the volume flow of fluids or fluent solid material wherein the fluid passes through the meter in successive and more or less isolated quantities, the meter being driven by the flow with measuring chambers which expand or contract during measurement having rigid movable walls comprising reciprocating pistons, e.g. reciprocating in a rotating body
    • G01F3/16Measuring the volume flow of fluids or fluent solid material wherein the fluid passes through the meter in successive and more or less isolated quantities, the meter being driven by the flow with measuring chambers which expand or contract during measurement having rigid movable walls comprising reciprocating pistons, e.g. reciprocating in a rotating body in stationary cylinders
    • G01F3/18Measuring the volume flow of fluids or fluent solid material wherein the fluid passes through the meter in successive and more or less isolated quantities, the meter being driven by the flow with measuring chambers which expand or contract during measurement having rigid movable walls comprising reciprocating pistons, e.g. reciprocating in a rotating body in stationary cylinders involving two or more cylinders
    • GPHYSICS
    • G05CONTROLLING; REGULATING
    • G05DSYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D11/00Control of flow ratio
    • G05D11/02Controlling ratio of two or more flows of fluid or fluent material
    • G05D11/13Controlling ratio of two or more flows of fluid or fluent material characterised by the use of electric means
    • G05D11/139Controlling ratio of two or more flows of fluid or fluent material characterised by the use of electric means by measuring a value related to the quantity of the individual components and sensing at least one property of the mixture

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  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Accessories For Mixers (AREA)

Abstract

在一种用于向计量装置连续供应不同批次的同一种液体介质的方法中,在批次变化期间逐步添加新批次的介质。

Description

用于向计量装置进行连续供应的方法和设备
背景技术
本发明涉及一种向计量装置连续供应不同批次的同一种液体介质的方法和设备。
在工业生产中,经常有这样的问题:不同批次的液体(例如粘合剂或铸造材料)在性能方面显著不同。然而,可以通过改变计量参数(诸如计量阀的开启时间、介质压力或者还有温度)来进行补偿,以便即使在介质参数改变的情况下(例如在粘度改变的情况下),也能达到相同的计量结果。如果在计量过程中对结果进行控制,则轻微且缓慢发生的变化可以通过调整计量参数进行补偿。然而,这里出现问题:待计量的介质的特性在批次变化期间变化很大,以至于重新调整计量参数不足以达到一致的计量结果。
为了解决这个问题,可以在批次变化期间清洗或更换引导所述介质的所有部件。然而在这种情况下,计量系统必须重新调整以适应后续批次的特性。另一方面,如果在不进行清洗的情况下进行批次变化,就会发生介质特性的突然变化,在所述变化期间,计量参数不可能自动重新调整。
发明内容
因此,本发明的目的是提供用于向计量装置进行连续供应的方法和设备,通过所述方法和设备,计量装置可以被连续供应不同的批次,而不需要清洗或更换部件,也不必对计量参数进行完全的重新调整。
该目的通过以下特征来实现。
为了满足该目的,根据第一方面,提供了向计量装置连续供应不同批次的同一种液体介质的方法,在所述方法中,在计量第一批次后,向所述计量装置供应新批次。在这方面,新批次的介质在这种批次变化期间借助于控制装置逐步添加到第一批次的介质。由于新批次的介质逐步添加(即逐渐增加添入)到旧批次的介质,可以实现两个批次之间的过渡是平滑的,并且计量装置的控制装置可以通过调整计量参数来连续适应两种介质的特性。因此,计量装置的调节可以仅补偿所添加介质的参数的微小变化,从而无中断生产是可能的。由于新批次的添加由控制装置控制,因此可以根据需要控制两种介质之间的转换,并且特别是使得供应到计量装置的介质的材料参数不发生突然的而只是微小的变化。
本发明的有利实施例在说明书、附图和以下特征中进行了描述。
根据第一有利实施例,第一批次和新批次的介质可以在供应到计量装置之前在管线中混合。由于这种共同供应管线,旧批次的介质和新批次的介质以特定的混合比例添加到所述共同供应管线中,混合可以在管线内进行,而不需要达到这个目的所必须的附加的混合部件,例如静态混合器等。
根据另一个有利实施例,每单位时间内添加的介质的量可以由控制装置预先确定。因此,所述量可以在控制装置中预先确定,例如,新批次的介质首先仅以少量添加到旧批次的介质,并随着时间的增加以增加的量添加到旧批次的介质,从而在两种介质混合后,添加到计量装置的介质仅发生微小变化。
根据另一个有利实施例,所述第一批次的所述介质可以从第一容器供应,并且所述第二批次的所述介质可以从第二容器供应,其中在所述计量装置被供应来自所述第一容器的介质时,所述第二容器中的所述介质被调节。这样做的好处是,当保持连续操作时,对新批次进行预处理是可能的,例如,混合、温度控制和/或排气。
根据另一个有利实施例,可以使用计量装置,在所述待计量的介质的粘度发生变化的情况下,利用所述计量装置自动调整计量参数。在这种情况下,在待计量的介质的材料特性仅发生微小的变化的情况下,也可以实现稳定的计量结果,而不必为此中断操作。
根据另一个有利实施例,可以提供用于执行上述那种方法的设备,所述设备具有第一容器和第二容器以及第一泵和第二泵,其中,利用所述泵,可以通过公共管线将介质供应到计量装置。此外,可以提供控制装置,所述控制装置被配置并适配成控制所述两个泵,使得来自所述第二容器的介质逐步添加到来自所述第一容器的所述介质。通过适当地控制两个泵,可以预先确定和设置由每个泵供应到公共管线中的量,其中特别是也可以预先确定由两个泵在单位时间内供应到公共管线中的量的比率。
例如,如果使用活塞泵,则可以借助于控制装置来预先确定每单位时间的活塞行程数和/或相应的活塞行程的长度。为了使新批次的介质与旧批次的介质逐步混合,一个泵可以例如首先执行九个泵行程,而另一个泵在单位时间内执行一个泵行程。然后,这个比例可以在预定的时间段内逐步改变,使得在过渡阶段结束时,只有新批次的泵在工作,而旧批次的泵关闭。在这方面,旧批次和新批次的两种介质的混合可以以有利的方式在公共管线中进行,所述管线的输入端与两个泵连接,并且其输出端与计量装置连接。
根据另一个有利实施例,两个容器可以设置有填充水平传感器,其中控制装置根据填充水平传感器的信号对两个泵进行控制。在这个实施例中,可以以自动化的方式进行连续操作,因为当容器中的批次的介质过低时可以借助于填充水平传感器来确定。然后,供应新批次的介质的泵可以被激活,以确保通过渐进式混合实现两个批次之间的平稳过渡。
附图说明
下面将参考有利的实施例和附图,仅通过示例的方式来描述本发明。附图示出为:
图1是用于连续介质供应的设备的示意图;
图2是穿过线的纵向剖面;并且
图3是说明在批次变化期间的供应量的图。
具体实施方式
图1示出向计量装置10连续供应不同批次A和B的同一种液体介质的设备。计量装置10仅被示意性地示出并且包括至少一个计量阀,例如喷射阀,使用所述计量阀可以非常少量地施加介质。此外,计量装置具有本身已知的调节装置,使用所述调节装置可以通过调整计量参数(诸如计量阀的开启时间、介质压力或温度),来补偿待计量的介质的材料特性的微小变化,以达到一致的计量结果。
图1所示的设备还具有两个基本相同的容器12和14,其中第一批次A的介质被装入容器12,并且第二批次B的介质被装入容器14。然而,两种介质都是相同的液体介质(例如粘合剂或铸造材料),然而由于批次不同,所述介质可以具有不同的材料参数。为了供应介质,容器12与泵16相通,并且容器14与泵18相通。通过两个泵16和18,存在于容器中的介质各自都可以从容器12和14中泵入公共管线20,所述公共管线通过供应管线22和24连接到两个泵16和18。因此,两个容器12和14的内容物可以经由公共管线20供应到计量装置10。
在所示的实施例中,两个泵16和18被设计成活塞泵,并分别具有磁性标记的活塞26和28,所述活塞的位置可以通过磁性测量系统(例如霍尔元件30、32)读出。在泵16的区域中的两个单向阀34和36和在泵18的区域中的两个单向阀38和40用于交替地将介质从容器12或容器14供应到公共管线20中。
在所示的实施例中,两个活塞泵16和18的控制通过各自的两个气动阀进行,所述气动阀以已知的方式连接到压力供应器P和压力返回装置R。
此外,在所示的实施例中,提供了控制装置50,其用于控制两个泵16和18,使得来自一个容器的介质可以逐步添加到来自另一个容器的介质。
为了自动识别这样的批次变化,两个容器12和14各自设置有填充水平传感器52和54,所述填充水平传感器通过浮子56和58检测容器12和14中各自的填充水平。例如,如果在容器12中,位于其中的批次A的介质已经达到剩余量,如图1所示,在泵16的全行程之后,可以触发泵18的小行程,使得只有少量的新批次B通过供应管线24被添加到公共管线20中。在这方面,控制装置50被编程为使得从容器12中输送的量不断减少,而从罐子14中输送的量不断增加。这样,两个批次A和B的介质之间发生逐步渐进的过渡。在这方面,两种介质的均匀混合以有利的方式在公共管线20内发生,两个批次的介质通过所述公共管线被供应到计量装置10。由于管线20内的层流,发生两个批次的混合,这在图2中进行了说明。它示出在管线20中,两种连续的介质如何被流动前锋分配并且混合。
图3示出从容器12中供应的批次A的介质的量减少和从容器14中供应的介质B的量同时增加。可以看出,每单位时间内供应到计量装置10或管线20的批次A的量减少,而每单位时间内供应的批次B的量增加,直到只供应批次B的介质。
最后,图1示出两个容器12和14可以各自设置有搅拌单元60、62,以调节一个容器中的介质,同时将来自另一个容器的介质供应到计量装置10。另外,容器可以设置有温度控制装置和/或排气装置。
可以理解的是,上面描述的实施例纯属示例性的。例如,泵16和18也可以由任何其他泵代替。在任何情况下,都可以通过预先定义每单位时间内由泵输送的泵送量来实现对所供应的介质量的调节。

Claims (9)

1.一种用于向计量装置(10)连续供应不同批次(A、B)的同一种液体介质的方法,在所述方法中,在对第一批次(A)进行计量后,向所述计量装置(10)供应新批次(B),其中所述新批次(B)的介质在批次变化期间借助于控制装置(50)被逐步添加到所述第一批次(A)的介质。
2.根据权利要求1所述的方法,
其特征在于,
所述第一批次和所述新批次的所述介质在管线(20)中混合。
3.根据权利要求1或权利要求2所述的方法,
其特征在于,
每单位时间内添加的介质的量由所述控制装置(50)预先确定。
4.根据前述权利要求中任一项所述的方法,
其特征在于,
从第一容器(12)供应所述第一批次(A)的介质,并且从第二容器(14)供应所述第二批次(B)的介质,并且在所述计量装置(10)被供应来自所述第一容器(12)的介质(A)同时,调节所述第二容器(14)中的介质。
5.根据权利要求4所述的方法,
其特征在于,
所述第二容器(14)中的所述介质被排气。
6.根据前述权利要求中任一项所述的方法,
其特征在于,
使用计量装置(10),在待计量的介质的粘度发生变化的情况下,利用所述计量装置调整计量参数。
7.一种用于执行根据前述权利要求中任一项所述的方法的设备,具有第一容器(12)和第二容器(14)以及第一泵(16)和第二泵(18),利用所述第一泵和所述第二泵将介质经由公共管线(20)供应到计量装置(10),并且所述设备具有控制装置(50),所述控制装置被配置并适配成控制两个泵(16、18),使得来自所述第二容器(14)的介质被逐步添加到来自所述第一容器(12)的介质。
8.根据权利要求7所述的设备,
其特征在于,
两个容器(12、14)设置有填充水平传感器(52、54),并且所述控制装置(50)根据所述填充水平传感器(52、54)的信号来执行对所述两个泵(16、18)的控制。
9.根据权利要求7或权利要求8所述的设备,
其特征在于,
两个容器(12、14)设置有搅拌装置(60、62)和/或温度控制装置。
CN202310713499.XA 2022-06-17 2023-06-15 用于向计量装置进行连续供应的方法和设备 Pending CN117249875A (zh)

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