CN107144325B - Mass flow meter calibration detection device - Google Patents
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Abstract
Description
技术领域technical field
本发明涉及检测领域，尤其涉及一种质量流量计标定检测装置。The invention relates to the detection field, in particular to a calibration detection device for a mass flow meter.
背景技术Background technique
质量流量计是测量管道内质量流量的流量测量仪表，现有的质量流量计标定管道，不论是质量流量的标定，还是密度的标定，均采用的是直型标定管道的方式，且在待质量流量计标定法兰的前端无恒流稳压装置。虽然采用直型标定管道进行质量流量计产品质量流量和密度的标定能够实现产品出厂标定检测的标准，但是该标准也是同类产品中较低档次的精度标准，一般为0.5％的精度。如果该精度下的质量流量计只是用于食品和医药等领域中检测部分，那么还能够满足客户需求且不会出现较大经济损失及生产问题。然而，大部分的质量流量计产品都是用于石油、石化、贸易结算等领域，这就要求质量流量计产品的精度要小于0.1％的精度。因此，对于质量流量计产品来讲，既要提高自身产品的精度，也要提高该产品标定装置的精度。The mass flowmeter is a flow measuring instrument for measuring the mass flow in the pipeline. The existing mass flowmeter calibration pipeline, whether it is the calibration of the mass flow or the calibration of the density, adopts the method of straight calibration pipeline, and the mass flowmeter There is no constant current and voltage stabilizing device at the front end of the flowmeter calibration flange. Although the calibration of the mass flow rate and density of mass flowmeter products using straight calibration pipes can achieve the standard of product factory calibration and testing, this standard is also a lower-grade accuracy standard among similar products, generally with an accuracy of 0.5%. If the mass flowmeter with this accuracy is only used for the detection part in the fields of food and medicine, it can still meet the needs of customers without large economic losses and production problems. However, most mass flowmeter products are used in petroleum, petrochemical, trade settlement and other fields, which requires the accuracy of mass flowmeter products to be less than 0.1%. Therefore, for mass flowmeter products, it is necessary to improve the accuracy of its own products and the accuracy of the calibration device of the product.
发明内容Contents of the invention
鉴于以上所述现有技术的缺点，本发明提供一种质量流量计标定检测装置，以解决上述技术问题。In view of the shortcomings of the prior art described above, the present invention provides a mass flow meter calibration detection device to solve the above technical problems.
本发明提供的质量流量计标定检测装置，至少包括：标定溶液输出单元、标定管道、计量单元和用于固定标定管道的固定基架，所述标定溶液输出单元与标定管道连接，所述标定管道与计量单元连接；The mass flowmeter calibration detection device provided by the present invention at least includes: a calibration solution output unit, a calibration pipeline, a metering unit and a fixed base frame for fixing the calibration pipeline, the calibration solution output unit is connected to the calibration pipeline, and the calibration pipeline Connect with the metering unit;
所述标定溶液输出单元包括标定溶液装置、溶液泵和恒压恒流罐，所述标定溶液装置与溶液泵连接，所述溶液泵与恒流恒压罐连接。The calibration solution output unit includes a calibration solution device, a solution pump and a constant pressure and constant flow tank, the calibration solution device is connected to the solution pump, and the solution pump is connected to the constant current and pressure tank.
进一步，待标定质量流量计与所述标定管道连接，所述标定管道与恒压恒流罐底部连接，所述待标定质量流量计设置于恒压恒流罐的内部的液体水平面以下。Further, the mass flowmeter to be calibrated is connected to the calibration pipeline, the calibration pipeline is connected to the bottom of the constant pressure and constant flow tank, and the mass flowmeter to be calibrated is arranged below the liquid level inside the constant pressure and constant flow tank.
进一步，所述标定管道设置有向下的转角，所述待标定质量流量计的安装位置的水平面低于标定管道与恒压恒流罐连接处的水平位置。Further, the calibration pipeline is provided with a downward corner, and the horizontal plane of the installation position of the mass flowmeter to be calibrated is lower than the horizontal position of the connection between the calibration pipeline and the constant pressure and constant flow tank.
进一步，所述标定管道为倒门型结构，待标定质量流量计设置于倒门型结构的门梁处的标定管道。Further, the calibration pipeline is an inverted door structure, and the mass flowmeter to be calibrated is arranged on the calibration pipeline at the door beam of the inverted door structure.
进一步，还包括执行器开关和与执行器开关连接的控制单元，所述执行器开关包括设置于恒压恒流罐与待标定质量流量计之间的标定管道的第一执行器开关，以及设置于待标定质量流量计与计量单元之间的标定管道的第二执行器开关。Further, it also includes an actuator switch and a control unit connected to the actuator switch, the actuator switch includes a first actuator switch arranged in the calibration pipeline between the constant pressure and constant flow tank and the mass flowmeter to be calibrated, and the setting The second actuator switch of the calibration pipeline between the mass flow meter to be calibrated and the metering unit.
进一步，所述计量单元为电子秤，所述电子秤设置有排水控制阀，所述排水控制阀与控制单元连接。Further, the metering unit is an electronic scale, and the electronic scale is provided with a drainage control valve, and the drainage control valve is connected to the control unit.
本发明的有益效果：本发明中的质量流量计标定检测装置，在标定质量流量计前端安装恒流稳压罐体，能提供出恒流稳压的标定介质溶液，实现质量流量计在标定计量过程中能够输出平稳的相位差信号，同时将标定的质量流量计安装在倒门型管道处进行标定，既能够提高质量流量计产品的标定计量精度，又能提高整套标定装置系统的计量精度，弥补了现有标定装置无法实现提升产品标定精度的缺陷。Beneficial effects of the present invention: The mass flowmeter calibration detection device in the present invention is equipped with a constant current and voltage stabilizing tank body at the front end of the calibration mass flowmeter, which can provide a constant current and voltage stabilization calibration medium solution, and realize the calibration and measurement of the mass flowmeter During the process, a stable phase difference signal can be output, and at the same time, the calibrated mass flowmeter is installed at the inverted door type pipeline for calibration, which can not only improve the calibration measurement accuracy of the mass flowmeter product, but also improve the measurement accuracy of the entire calibration device system. It makes up for the defect that the existing calibration device cannot improve the calibration accuracy of products.
附图说明Description of drawings
图1是本发明的结构示意图。Fig. 1 is a structural schematic diagram of the present invention.
图2是本发明的实施例中倒门型标定管道内气泡存在位置示意图。Fig. 2 is a schematic diagram of the positions where air bubbles exist in the inverted door-type calibration pipeline in an embodiment of the present invention.
图3是本发明的实施例的微流量质量流量计输出相位差波动数据曲线示意图。Fig. 3 is a schematic diagram of the output phase difference fluctuation data curve of the micro-flow mass flowmeter according to the embodiment of the present invention.
图4是本发明的实施例的大流量质量流量计输出相位差波动数据曲线示意图。Fig. 4 is a schematic diagram of the output phase difference fluctuation data curve of the large flow mass flowmeter according to the embodiment of the present invention.
具体实施方式Detailed ways
以下通过特定的具体实例说明本发明的实施方式，本领域技术人员可由本说明书所揭露的内容轻易地了解本发明的其他优点与功效。本发明还可以通过另外不同的具体实施方式加以实施或应用，本说明书中的各项细节也可以基于不同观点与应用，在没有背离本发明的精神下进行各种修饰或改变。需说明的是，在不冲突的情况下，以下实施例及实施例中的特征可以相互组合。Embodiments of the present invention are described below through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific implementation modes, and various modifications or changes can be made to the details in this specification based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that, in the case of no conflict, the following embodiments and features in the embodiments can be combined with each other.
需要说明的是，以下实施例中所提供的图示仅以示意方式说明本发明的基本构想，遂图式中仅显示与本发明中有关的组件而非按照实际实施时的组件数目、形状及尺寸绘制，其实际实施时各组件的型态、数量及比例可为一种随意的改变，且其组件布局型态也可能更为复杂。It should be noted that the diagrams provided in the following embodiments are only schematically illustrating the basic ideas of the present invention, and only the components related to the present invention are shown in the diagrams rather than the number, shape and shape of the components in actual implementation. Dimensional drawing, the type, quantity and proportion of each component can be changed arbitrarily during actual implementation, and the component layout type may also be more complicated.
如图1所示，本实施例中的质量流量计标定检测装置，至少包括：标定溶液输出单元、标定管道、计量单元和用于固定标定管道的固定基架，标定溶液输出单元与标定管道连接，标定管道与计量单元连接；As shown in Figure 1, the mass flowmeter calibration detection device in this embodiment at least includes: a calibration solution output unit, a calibration pipeline, a metering unit and a fixed base for fixing the calibration pipeline, and the calibration solution output unit is connected to the calibration pipeline , the calibration pipe is connected to the metering unit;
标定溶液输出单元包括标定溶液装置、溶液泵和恒压恒流罐，标定溶液装置与溶液泵连接，溶液泵与恒流恒压罐连接。The calibration solution output unit includes a calibration solution device, a solution pump and a constant pressure and constant flow tank, the calibration solution device is connected to the solution pump, and the solution pump is connected to the constant current and pressure tank.
在本实施例中，在待标定质量流量计法兰的前端安装恒流稳压罐，能提供出恒流稳压的标定介质溶液，实现质量流量计在标定计量过程中能够输出平稳的相位差信号，进而提升了整机质量流量计的标定计量精度和整套标定装置的精度。In this embodiment, a constant current and pressure tank is installed at the front end of the flange of the mass flowmeter to be calibrated, which can provide a constant current and stable pressure calibration medium solution, so that the mass flowmeter can output a stable phase difference during the calibration measurement process. Signal, thereby improving the calibration measurement accuracy of the mass flowmeter of the whole machine and the accuracy of the entire calibration device.
在本实施例中，标定管道水平设置，待标定质量流量计与所述标定管道连接，所述标定管道与恒压恒流罐底部连接，所述待标定质量流量计设置于恒压恒流罐的内部的液体水平面以下。优选地，标定管道设置有向下的转角，所述待标定质量流量计的安装位置的水平面低于标定管道与恒压恒流罐连接处的水平位置。本实施例中的标定管道为倒门型结构，待标定质量流量计设置于倒门型结构的门梁处的标定管道。在质量流量计质量流量标定的生产过程中，不论是设计何种形状的标定管道，在装置管道的内部都会因为溶液泵的存在，使管道内存在一定比例的气泡。因此，所设计的管道及走向能够最大限度的降低标定介质溶液中的气泡含量，或是通过某种装置将标定介质溶液中的气泡过滤掉，这样确保标定介质溶液平稳无气泡的状态通过待标定的质量流量计，提高整套装置系统及质量流量计产品的精度。本实施例采用倒门型标定管道，倒门型结构是指标定管道通过直角拐角连接装置使水平的标定管道形成向下的拐角，进而使标定管道整体形成一个“水平-向下垂直-水平-向上垂直-水平”的凹陷的形状，即为倒门型结构，如图1、2所示，本实施例采用这种结构，实际的质量流量标定生产流程中，将管道内的气泡极大限度的过滤至恒流稳压罐体内的上方空间内。In this embodiment, the calibration pipeline is arranged horizontally, the mass flowmeter to be calibrated is connected to the calibration pipeline, the calibration pipeline is connected to the bottom of the constant pressure and constant flow tank, and the mass flowmeter to be calibrated is arranged in the constant pressure and constant flow tank below the liquid level inside. Preferably, the calibration pipeline is provided with a downward corner, and the level of the installation position of the mass flowmeter to be calibrated is lower than the horizontal position of the connection between the calibration pipeline and the constant pressure and constant flow tank. The calibration pipeline in this embodiment is an inverted door structure, and the mass flowmeter to be calibrated is arranged on the calibration pipeline at the door beam of the inverted door structure. In the production process of the mass flow calibration of the mass flowmeter, no matter what shape of the calibration pipeline is designed, there will be a certain proportion of air bubbles in the pipeline due to the existence of the solution pump inside the pipeline of the device. Therefore, the designed pipeline and direction can minimize the bubble content in the calibration medium solution, or filter out the bubbles in the calibration medium solution through a certain device, so as to ensure that the calibration medium solution passes through the calibration medium in a stable and bubble-free state. The mass flowmeter can improve the accuracy of the whole device system and mass flowmeter products. This embodiment adopts an inverted door-type calibration pipeline. The inverted door-type structure means that the calibration pipeline forms a downward corner through a right-angled corner connection device, so that the calibration pipeline as a whole forms a "horizontal-downward vertical-horizontal- The upward vertical-horizontal concave shape is an inverted door structure, as shown in Figures 1 and 2. This embodiment adopts this structure. In the actual mass flow calibration production process, the air bubbles in the pipeline are minimized. Filtration to the upper space in the constant-current and pressure-stabilizing tank.
在本实施例中，不论是由于溶液泵工作产生的气泡，还是安装待标定质量流量计在安装法兰处产生的气泡都会通过标定管道回流至恒流稳压罐体中。通常在进行质量流量计产品质量流量标定前，首先进行的工作就是将待标定的质量流量计安装于如图1所示的装置系统内且无泄漏现象；其次是使标定介质溶液在标定管道内处于小流量且恒压稳流的通过待标定的质量流量计，其目的就是最大程度的排除进入质量流量计传感器内的气泡含量，最大程度的将标定溶液内气泡滞留于恒流稳压罐体内，并且在该状态下要工作一定的时间；最后，进行标定生产工作。为了验证基于倒门型和恒流稳压罐体的质量流量计质量流量标定装置系统的整体精度，将直管道式的标定装置中选取的DN25口径质量流量计安装新型的标定检测装置系统中。然后分别进行长达6小时的微流量计和最大流量输出信号的检测，观察两种状态下输出信号的波动状态，如图3所示，本实施例中的装置微流量状态下质量流量计实时输出相位差的记录数据曲线，可以看出本实施例中DN25口径的质量流量计，进行长达6小时的微流量测试，在该状态下质量流量计输出的相位差波动范围为0.03584°-0.036°，即有0.00016°波动。如图4所示，本实施例中的装置大流量状态下质量流量计实时输出相位差的记录数据曲线，可以看出本实施例中的DN25口径的质量流量计，进行长达6小时的大流量测试，在该状态下质量流量计输出的相位差波动范围为1.2455°-1.24657°，即有0.00107°波动。本实施例中的基于倒门型和恒流稳压罐体的质量流量计质量流量标定装置系统可以最大程度的消除标定介质溶液中的气泡含量，并能提供出恒流稳压的标定介质溶液，实现质量流量计在标定计量过程中能够输出平稳的相位差信号，进而提升了整机质量流量计的标定计量精度和整套标定装置的精度。DN25口径的质量流量计在新型的基于倒门型和恒流稳压罐体的质量流量计质量流量标定装置系统中的标定计量精度数据如表1所示：In this embodiment, no matter the air bubbles generated by the working of the solution pump or the air bubbles generated at the installation flange of the mass flowmeter to be calibrated will flow back into the constant-current and pressure-stabilized tank through the calibration pipeline. Usually, before the mass flow rate calibration of mass flowmeter products, the first work is to install the mass flowmeter to be calibrated in the device system shown in Figure 1 without leakage; the second is to make the calibration medium solution in the calibration pipeline The purpose of passing through the mass flowmeter to be calibrated at a small flow rate and constant pressure and steady flow is to eliminate the air bubble content entering the mass flowmeter sensor to the greatest extent, and to retain the air bubbles in the calibration solution in the constant flow and pressure stabilization tank to the greatest extent. , and work in this state for a certain period of time; finally, carry out calibration production work. In order to verify the overall accuracy of the mass flow meter mass flow calibration device system based on the inverted door type and constant-flow stabilized tank, the DN25 caliber mass flow meter selected from the straight-pipe calibration device was installed in a new calibration detection device system. Then carry out the detection of the micro flow meter and the maximum flow output signal respectively for up to 6 hours, observe the fluctuation state of the output signal under the two states, as shown in Figure 3, the mass flow meter in the device micro flow state in this embodiment real-time From the recorded data curve of the output phase difference, it can be seen that the DN25 caliber mass flowmeter in this embodiment has been tested for micro flow for up to 6 hours. In this state, the phase difference fluctuation range of the mass flowmeter output is 0.03584°-0.036° °, that is, there is a fluctuation of 0.00016°. As shown in Figure 4, the real-time output phase difference record data curve of the mass flowmeter in the device in this embodiment under the state of large flow, it can be seen that the mass flowmeter of DN25 caliber in this embodiment performs a large Flow test, in this state, the phase difference fluctuation range of the mass flowmeter output is 1.2455°-1.24657°, that is, there is a fluctuation of 0.00107°. In this embodiment, the mass flow meter mass flow calibration device system based on the inverted door type and constant-current and pressure-stabilized tank body can eliminate the bubble content in the calibration medium solution to the greatest extent, and can provide a constant-flow and stable-pressure calibration medium solution , to realize that the mass flowmeter can output a stable phase difference signal during the calibration measurement process, thereby improving the calibration measurement accuracy of the mass flowmeter of the whole machine and the accuracy of the entire calibration device. The calibrated measurement accuracy data of the DN25 caliber mass flowmeter in the new mass flowmeter mass flow calibration device system based on the inverted door type and constant current and pressure stabilized tank are shown in Table 1:
表1Table 1
从表1可以看出，DN25口径质量流量计应用本实施例的最好精度为0.075194％，当仪表进行微流量计量检测时其精度最差也不过为0.266756％，这样远低于0.5％的精度。在质量流量计产品实际的应用中，通常选择量程比为1:10的缩放比量程来作为仪表的使用量程范围，即用DN25口径的质量流量计仪表的最佳使用量程范围为12kg/M-120kg/M，所以DN25口径的质量流量计仪表应用在本实施例中标定完成的精度在0.1％左右。It can be seen from Table 1 that the best accuracy of the DN25 caliber mass flowmeter applied in this embodiment is 0.075194%, and the worst accuracy is no more than 0.266756% when the instrument is used for micro-flow measurement detection, which is far lower than the accuracy of 0.5%. . In the actual application of mass flowmeter products, the scaling ratio range with a turndown ratio of 1:10 is usually selected as the use range of the instrument, that is, the best use range of the DN25 caliber mass flowmeter instrument is 12kg/M- 120kg/M, so the DN25 caliber mass flow meter is used in this embodiment and the calibration accuracy is about 0.1%.
在本实施例中，还包括执行器开关和与执行器开关连接的控制单元，所述执行器开关包括设置于恒压恒流罐与待标定质量流量计之间的标定管道的第一执行器开关，以及设置于待标定质量流量计与计量单元之间的标定管道的第二执行器开关。本实施例中的计量单元为电子秤，电子秤连接有排水控制阀，排水控制阀与控制单元连接。本实施例中的控制单元可以采用单片机、CPU、ARM处理芯片等具有控制功能的元器件，本领域技术人员可以轻易的获取，在此不再赘述。In this embodiment, an actuator switch and a control unit connected to the actuator switch are also included, and the actuator switch includes a first actuator arranged in a calibration pipeline between the constant pressure and constant flow tank and the mass flowmeter to be calibrated switch, and a second actuator switch arranged in the calibration pipeline between the mass flowmeter to be calibrated and the metering unit. The metering unit in this embodiment is an electronic scale, and the electronic scale is connected with a drainage control valve, and the drainage control valve is connected with the control unit. The control unit in this embodiment can use components with control functions such as single-chip microcomputer, CPU, ARM processing chip, etc., which can be easily obtained by those skilled in the art, and will not be repeated here.
上述实施例仅例示性说明本发明的原理及其功效，而非用于限制本发明。任何熟悉此技术的人士皆可在不违背本发明的精神及范畴下，对上述实施例进行修饰或改变。因此，举凡所属技术领域中具有通常知识者在未脱离本发明所揭示的精神与技术思想下所完成的一切等效修饰或改变，仍应由本发明的权利要求所涵盖。The above-mentioned embodiments only illustrate the principles and effects of the present invention, but are not intended to limit the present invention. Anyone skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by those skilled in the art without departing from the spirit and technical ideas disclosed in the present invention shall still be covered by the claims of the present invention.
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