Metering calibration device for float fluid flowmeter

Abstract

The utility model relates to a metering calibration device for a float fluid flowmeter. The metering calibration device comprises a medium source; a pump body; the control assembly is used for controlling the flow of the fluid medium; a first interface of the commutator is connected with the flow regulating valve, a second interface is connected with the standard flowmeter through a first pipeline, and a third interface is connected with the measured flowmeter through a second pipeline; the calibration of any fluid medium can be obtained by calculating the flow value flowing through the standard flow meter and the flow value flowing through the measured flow meter under the same parameters; the standard flow meter and the measured flow meter are connected in parallel through the commutator, the measured flow meter can be prevented from making contact with the standard flow meter, pollution media in the polluted measured flow meter are prevented from making contact with the standard flow meter, and therefore the standard flow meter is prevented from being polluted.

Description

Technical Field

[0001] The utility model belongs to the technical field of flow meter calibration, and in particular relates to a measurement calibration device for a float liquid flow meter. Background Art

[0002] With the progress of science and technology and the country's emphasis on energy and environment, the status of flow measurement has become more prominent, and related technologies have also made great progress, such as a variety of new flow meters are constantly put into use.

[0003] The working principle of the float liquid flowmeter is that when the measured fluid flows through the float flowmeter, the fluid forms an upward force in the tapered tube, pushing the float up. As the flow rate increases, the flow rate through the annular gap slows down, and the static pressure difference decreases, but the upward force on the float is still balanced with gravity, etc., only the equilibrium position changes. Therefore, the height or displacement of the float is proportional to the flow rate of the measured medium. By reading the position or displacement of the float, the flow rate of the fluid can be known.

[0004] Float liquid flowmeters are widely used in many fields due to their high precision, high stability and easy maintenance. For example, they are used in the chemical industry to measure the flow of various non-pulsating fluids. In particular, corrosion-resistant float liquid flowmeters are used to detect the flow of corrosive media such as acids, alkalis, and oxidants. For example, they are used in the field of environmental protection to monitor flow during sewage treatment and discharge. In order to ensure the accuracy of detection, float liquid flowmeters also need to be regularly inspected and calibrated. As shown in the attached Figure 1 As shown, the current common calibration method is to calibrate the tested float liquid flow meter 91 and the standard device 92 in series. The detection medium flows through the tested float liquid flow meter 91 and then flows through the standard device 92. The pollutants remaining in the tested float liquid flow meter will flow through the standard device with the medium, causing contamination to the standard device and reducing the service life of the standard device. The cleaning of the standard device after calibration is also more troublesome, wasting the cleaning medium.

[0005] Therefore, it is necessary to improve the prior art to overcome the above defects in the prior art. Utility Model Content

[0006] In view of this, the embodiment of the present application provides a measurement and calibration device for a float liquid flow meter to solve at least one problem existing in the background technology, including:

[0007] A medium source storing a fluid medium;

[0008] A pump body, which is in communication with the medium source;

[0009] A control assembly, comprising a flow switch, a temperature sensor, a pressure sensor, a pressure regulating valve, and a flow regulating valve connected in sequence from the inlet end to the outlet end, wherein the inlet end of the flow switch is connected to the outlet end of the pump body;

[0010] The commutator comprises a first interface, a second interface and a third interface, wherein the first interface is connected to the flow regulating valve, the second interface is connected to a standard flow meter through a first pipeline, and the third interface is connected to a measured flow meter through a second pipeline;

[0011] The commutator has a first working state in which the first interface is connected to the second interface and a second working state in which the first interface is connected to the third interface; the standard flow meter is provided with a first preset threshold value, and when the flow value of the fluid medium flowing through the standard flow meter is less than the first preset threshold value, the commutator switches from the first working state to the second working state;

[0012] The first preset threshold is the fluctuation range of the flow rate flowing through the standard flow meter per unit time.

[0013] Optionally, in the above-mentioned measurement and calibration device for a float liquid flowmeter, the standard flowmeter is an electromagnetic flowmeter.

[0014] Optionally, in the above-mentioned measurement and calibration device for a float liquid flowmeter, the measurement range of the standard flowmeter is 80-8000 ml / min, and the allowable error is ±0.2% of the full scale.

[0015] Optionally, in the above-mentioned measurement and calibration device for a float liquid flowmeter, the measurement range of the temperature sensor is 0-100° C., and the allowable error is ±0.1% of the full scale.

[0016] Optionally, in the above-mentioned measurement and calibration device for a float liquid flowmeter, the measurement range of the pressure sensor is 0-10 kPa, and the allowable error is ±0.1% of the full scale.

[0017] Optionally, the above-mentioned measurement and calibration device for a float liquid flowmeter further includes a recovery component, including a first recovery container and a second recovery container, the first recovery container is connected to the standard flowmeter, and the second recovery container is connected to the measured flowmeter.

[0018] Optionally, the above-mentioned measurement and calibration device for a float liquid flowmeter further includes a liquid level detection component and a liquid replenishing structure disposed inside the medium source, and the liquid level detection component and the liquid replenishing structure are connected to a controller.

[0019] Compared with the prior art, the present application has the following beneficial effects: by providing a control component and a commutator, and the commutator includes a first interface, a second interface and a third interface, the first interface is connected to the control component, and the second interface and the third interface are separately connected to the standard flow meter and the measured flow meter through the first pipeline and the second pipeline respectively; by calculating the flow value flowing through the standard flow meter under the parameter and the flow value flowing through the measured flow meter, the calibration of any fluid medium can be obtained; and the standard flow meter is provided with a first preset threshold value, when the flow value of the fluid medium flowing through the standard flow meter is less than the first preset threshold value, the commutator switches from the first working state to the second working state, that is, when the fluctuation of the fluid medium passing through the standard flow meter is small, the commutator is switched from being connected with the standard flow meter to being connected with the measured flow meter, so as to make the detection of the fluid medium more accurate;

[0020] On the other hand, connecting the standard flowmeter and the measured flowmeter in parallel through a commutator can prevent the measured flowmeter from contacting the standard flowmeter, so as to prevent the contaminated medium in the contaminated measured flowmeter from contacting the standard flowmeter, thereby preventing the standard flowmeter from being contaminated. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 The present invention is a schematic diagram of the structure of a measuring and calibration device of a float liquid flow meter in the prior art.

[0022] Figure 2 This is a schematic diagram of a measurement and calibration device for a float liquid flow meter shown in this application. DETAILED DESCRIPTION

[0023] The exemplary embodiments disclosed in the present application will be described in more detail below. In the following description, a large number of specific details are given in order to provide a more thorough understanding of the present application. However, it is obvious to those skilled in the art that the present application can be implemented without one or more of these details. In other examples, in order to avoid confusion with the present application, some technical features well known in the art are not described; that is, all features of the actual embodiments are not described here, and known functions and structures are not described in detail.

[0024] It should be understood that when an element or layer is referred to as "on ...", "adjacent to ...", "connected to" or "coupled to" other elements or layers, it can be directly on, adjacent to, connected to or coupled to other elements or layers, or there can be intervening elements or layers. On the contrary, when an element is referred to as "directly on ...", "directly adjacent to ...", "directly connected to" or "directly coupled to" other elements or layers, there is no intervening element or layer. It should be understood that although the terms first, second, third, etc. can be used to describe various elements, components, regions, layers and / or parts, these elements, components, regions, layers and / or parts should not be limited by these terms. These terms are only used to distinguish one element, component, region, layer or part from another element, component, region, layer or part. Therefore, without departing from the teachings of the present application, the first element, component, region, layer or part discussed below can be represented as the second element, component, region, layer or part. And when the second element, component, region, layer or part is discussed, it does not indicate that the present application necessarily has the first element, component, region, layer or part.

[0025] Spatially relative terms such as "under", "beneath", "below", "under", "over", "above", etc., may be used herein for convenience of description to describe the relationship of one element or feature to other elements or features shown in the figures. It should be understood that the spatially relative terms are intended to encompass different orientations of the device in use and operation in addition to the orientation shown in the figures.

[0026] The purpose of the terms used herein is only to describe specific embodiments and is not intended to be limiting of the present application. When used herein, the singular forms "a", "an" and " / the" are also intended to include plural forms, unless the context clearly indicates another way. It should also be understood that the terms "consisting of" and / or "comprising", when used in this specification, determine the presence of features, integers, steps, operations, elements and / or parts, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, parts and / or groups. When used herein, the term "and / or" includes any and all combinations of the relevant listed items.

[0027] In order to thoroughly understand the present application, detailed steps and detailed structures will be presented in the following description to illustrate the technical solution of the present application. The preferred embodiments of the present application are described in detail below, but in addition to these detailed descriptions, the present application may also have other implementation methods.

[0028] Please refer to Figure 2As shown, the embodiment of the present application provides a measurement and calibration device for a float liquid flowmeter, including: a medium source 1, a pump body 2, a control component, a commutator 11 and a controller, and the above are connected in series in sequence. Among them, the medium source 1 stores a fluid medium, which can be water, air, physiological saline, methanol, or other mixed fluids; the pump body 2 is connected to the medium source 1, and is used to generate adsorption force on the fluid medium in the medium source 1; the control component is connected to the pump body 2, and is used to control the flow of the fluid medium, which includes a flow switch 3, a temperature sensor 4, a pressure sensor 5, a pressure regulating valve 6, and a flow regulating valve 7 connected in sequence from the inlet end to the outlet end, and the inlet end of the flow switch 3 is connected to the outlet end of the pump body 2; the commutator 11 includes a first interface, a second interface and a third interface, the first interface is connected to the control component, the second interface is connected to the standard flowmeter 9 through the first pipeline, and the third interface is connected to the measured flowmeter 8 through the second pipeline; the above pump body 2, flow switch 3, control component and commutator 11 can all be connected to the controller to execute the control signal sent by the controller. It should be noted that, in this embodiment, the control instructions and feedback issued by the controller are relatively mature technologies in the art and will not be described in detail here.

[0029] In an optional embodiment, the flow control valve 7 is connected to the first interface of the above-mentioned reversing device 11. In this embodiment, the flow control valve 7 is continuously adjustable to achieve the collection of different flow points of the same fluid medium.

[0030] In an optional embodiment, the standard flow meter 9 is an electromagnetic flow meter with a measuring range of 80-8000 ml / min, level 0.2, and an allowable error of ±0.2% of the full scale.

[0031] In an optional embodiment, the pressure regulating valve 6 can adjust the outlet pressure of the fluid medium as needed, thereby increasing or decreasing the pressure of the fluid medium passing through the valve, thereby achieving pressure regulation of the fluid system.

[0032] In an optional embodiment, the temperature sensor 4 and the pressure sensor 5 can be connected to the controller to feed back the temperature and pressure of the fluid medium detected by them to the controller for monitoring, so as to ensure that the fluid medium reaches the value required for the flow point detection. In this embodiment, the temperature sensor 4 has a measurement range of 0-100°C, ±0.1% FS, and an allowable error of ±0.1% of the full scale. The pressure transmitter has a measurement range of 0-10kPa, 0.1 level, and an allowable error of ±0.1% of the full scale.

[0033] In an optional embodiment, the commutator 11 has a first working state in which the first interface is connected to the second interface and a second working state in which the first interface is connected to the third interface; the standard flow meter 9 is provided with a first preset threshold value, and when the flow value of the fluid medium flowing through the standard flow meter 9 is less than the first preset threshold value, the commutator 11 switches from the first working state to the second working state. The first preset threshold value is the fluctuation range of the flow rate flowing through the standard flow meter 9 per unit time.

[0034] In an optional embodiment, the calibration device also includes a recovery component 10, which includes a first recovery container and a second recovery container. The first recovery container is connected to the standard flow meter 9 and is used to store the fluid medium after being detected by the standard flow meter 9. The second recovery container is connected to the measured flow meter 8 and is used to store the fluid medium passing through the measured flow meter 8.

[0035] The calibration device also includes a liquid level detection component and a liquid replenishing structure disposed inside the medium source 1, and the liquid level detection component and the liquid replenishing structure are connected to the controller. When the liquid level detection component detects that the liquid level inside the medium source 1 is not within a preset range, the detection information is transmitted to the controller, and the controller controls the liquid replenishing structure to replenish liquid into the medium source 1 to prevent the insufficient liquid level in the medium source 1 from affecting the flow rate of the fluid medium, thereby affecting its stability.

[0036] The calibration method of a measurement and calibration device for a float liquid flowmeter shown in this embodiment is as follows: the flow switch 3 is turned on, and the flow regulating valve 7 is opened to the first flow point, so that the commutator 11 is in the first working state, that is, the commutator 11 is connected to the standard flowmeter 9, so that the fluid medium at the first flow point flows through the commutator 11 through the standard flowmeter 9, and the standard flow at the first flow point is measured. Then, when the fluctuation of the fluid medium flowing through the standard flowmeter 9 is small, it means that the fluid medium is relatively stable at this time. At this time, the commutator 11 is switched from the first working state to the second working state, so that the commutator 11 is connected to the measured flowmeter 8, and the flow value flowing through the measured flowmeter 8 is recorded, and it is compared with the flow value flowing through the standard flowmeter 9 to achieve its calibration; in order to improve the detection accuracy, the flow regulating valve 7 can also be opened to the second flow point, the third flow point, the fourth flow point, and the fifth flow point respectively, and the above steps are repeated each time. The detection of each flow point is repeated at least three times, and the average value is taken as the calibration basis. Among them, the first flow point can be 100% of the flow through the standard flow meter 9, the second flow point can be 75% of the flow through the standard flow meter 9, the third flow point can be 50% of the flow through the standard flow meter 9, the fourth flow point can be 20% of the flow through the standard flow meter 9, and the fifth flow point can be 10% of the flow through the standard flow meter 9.

[0037] Among them, in the above, the standard flow meter 9 is provided with a first preset threshold value, and the first preset threshold value is the fluctuation range of the flow rate flowing through the standard flow meter 9 per unit time. When the flow value of the fluid medium flowing through the standard flow meter 9 is less than the first preset threshold value, the commutator 11 switches from the first working state to the second working state. It can be understood that when the fluctuation difference of the fluid medium flowing through the standard flow meter 9 within a certain period of time is small, the commutator 11 is connected to the measured flow meter 8 to improve the detection accuracy.

[0038] The above is only a specific implementation of the present application, and any other improvements made based on the concept of the present application are deemed to be within the protection scope of the present application.

Claims

1. A measuring and calibration device for a float liquid flowmeter, characterized in that: include: A medium source storing a fluid medium; A pump body, which is in communication with the medium source; A control assembly, comprising a flow switch, a temperature sensor, a pressure sensor, a pressure regulating valve, and a flow regulating valve connected in sequence from the inlet end to the outlet end, wherein the inlet end of the flow switch is connected to the outlet end of the pump body; The commutator comprises a first interface, a second interface and a third interface, wherein the first interface is connected to the flow regulating valve, the second interface is connected to a standard flow meter through a first pipeline, and the third interface is connected to a measured flow meter through a second pipeline; The commutator has a first working state in which the first interface is connected to the second interface and a second working state in which the first interface is connected to the third interface; the standard flow meter is provided with a first preset threshold value, and when the flow value of the fluid medium flowing through the standard flow meter is less than the first preset threshold value, the commutator switches from the first working state to the second working state; The first preset threshold is the fluctuation range of the flow rate flowing through the standard flow meter per unit time.

2. The measuring and calibration device for a float liquid flowmeter according to claim 1, characterized in that: The standard flow meter is an electromagnetic flow meter.

3. The measuring and calibration device for a float liquid flowmeter according to claim 2, characterized in that: The measuring range of the standard flow meter is 80-8000 ml / min, and the allowable error is ±0.2% of the full scale.

4. The measuring and calibration device for a float liquid flowmeter according to claim 1, characterized in that: The measuring range of the temperature sensor is 0-100°C, and the allowable error is ±0.1% of the full scale.

5. The measuring and calibration device for a float liquid flowmeter according to claim 1, characterized in that: The measuring range of the pressure sensor is 0-10 kPa, and the allowable error is ±0.1% of the full scale.

6. The measuring and calibration device for a float liquid flowmeter according to claim 1, characterized in that: The calibration device further comprises a recovery component, comprising a first recovery container and a second recovery container, wherein the first recovery container is in communication with the standard flow meter, and the second recovery container is in communication with the measured flow meter.

7. The measuring and calibration device for a float liquid flowmeter according to claim 1, characterized in that: The device also includes a liquid level detection component and a liquid replenishing structure arranged inside the medium source, and the liquid level detection component and the liquid replenishing structure are connected to a controller.

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