Standard device for quickly measuring micro flow

Abstract

The utility model relates to the technical field of flow calibration, and discloses a standard device for quickly measuring micro flow, which comprises a liquid flow pool, a first pipe fitting, a second pipe fitting and a third pipe fitting which are sequentially communicated, measured liquid is pumped into a standard measuring vessel through a power module, and the standard device aims to solve the problem that proper data of the micro flow are difficult to obtain to check a flow measured meter. A drainage hole is formed in a first preset scale of the standard measuring vessel, the fourth pipe fitting is communicated with the standard measuring vessel through the drainage hole, and the drainage valve selectively blocks the fourth pipe fitting; firstly, a drainage valve is opened, and measured liquid exceeding a first preset scale in a standard measuring vessel is rapidly discharged; then, the drainage valve is closed, the measuring valve is opened, time is recorded, and the measuring valve is closed until the measured liquid in the standard measuring vessel reaches a proper numerical value; when the difference value difference is calculated, the calibration of the measured flow meter can be completed, the measured liquid injected into the standard measuring vessel during calibration is reduced, the single calibration duration of the fast measurement micro flow standard device is shortened, and the calibration efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of flow calibration, in particular to a standard device for quickly measuring micro flow. Background Art

[0002] Measurement is the eye of industrial production, and flow measurement is one of the components of measurement science and technology. Especially in the current energy crisis and the increasing degree of automation in industrial production, the status and role of flow meters in the national economy are more obvious. With the development of industry, the accuracy and range of flow measurement are increasingly required.

[0003] Before the flow meter is put into use and during use, in order to ensure the accuracy and reliability of the flow meter's metering performance, it is generally calibrated regularly on the flow standard device in the laboratory; during the calibration process, the flow standard value is calculated based on the mass or volume of the medium flowing through the calibrated flow meter per unit time, that is, the metering barrel of the flow standard device. Due to many factors such as small measurement caliber, wide measurement range, and large range ratio, some flow meters have tiny flow rates; in daily calibration of tiny flow rates, when the calibration medium is injected into the metering barrel of the flow standard device, due to the tiny flow rate, and in order to ensure that the mass or volume of the medium in the metering barrel of the flow standard device reaches the effective calculated value, it causes problems such as long single calibration time at the calibration point and low calibration efficiency. Utility Model Content

[0004] The utility model aims to provide a standard device for quickly measuring small flow rates, which solves the problem that it is difficult to obtain suitable calibration data for small flows, shortens the time for a single quick calibration, and improves calibration efficiency.

[0005] To achieve this purpose, the utility model adopts the following technical solutions:

[0006] Standard device for rapid measurement of micro flow, including:

[0007] A liquid flow pool, wherein the liquid to be measured is contained in the liquid flow pool;

[0008] a first pipe, the first pipe being in communication with the liquid flow pool, the first pipe being provided with a power module, the power module being configured to pump the measured liquid out of the first pipe;

[0009] a second pipe fitting, the second pipe fitting being in communication with the first pipe fitting, a flow meter being arranged on the second pipe fitting, the flow meter being configured to detect the flow of the second pipe fitting;

[0010] a third pipe fitting, the third pipe fitting being in communication with the second pipe fitting, the third pipe fitting being provided with a measuring valve member, the measuring valve member being configured to selectively block the third pipe fitting;

[0011] A standard measuring vessel, the standard measuring vessel is connected to the third pipe, the standard measuring vessel is provided with a volume scale, and the standard measuring vessel is provided with a drainage hole at a first preset scale;

[0012] A fourth pipe fitting is connected to the standard measuring device through the drainage hole. A drainage valve is provided on the fourth pipe fitting, and the drainage valve is configured to selectively block the fourth pipe fitting.

[0013] As a preferred technical solution of the standard device for quickly measuring small flow rates, the standard measuring vessel includes a temperature measuring component, and the temperature measuring component is configured to measure the temperature of the measured liquid in the standard measuring vessel.

[0014] As a preferred technical solution for the standard device for quickly measuring small flow rates, a discharge hole is provided at the bottom of the standard measuring vessel, and the standard device for quickly measuring small flow rates includes a fifth pipe fitting, which is connected to the standard measuring vessel through the discharge hole, and a discharge valve is provided on the fifth pipe fitting, and the discharge valve is configured to selectively block the fifth pipe fitting.

[0015] As a preferred technical solution of the standard device for quickly measuring micro-flow rates, one end of the fifth pipe member away from the standard measuring device is connected to the liquid flow pool.

[0016] As a preferred technical solution for the standard device for quickly measuring micro-flow rates, one end of the fourth pipe member away from the standard measuring device is connected to the liquid flow pool.

[0017] As an optimal technical solution for the quick-measurement standard device for small flow rates, the quick-measurement standard device for small flow rates includes a switching member, which is arranged between the third pipe fitting and the standard measuring vessel. The switching member includes a first output tube and a second output tube, the first output tube is connected to the standard measuring vessel, and the switching member is configured to selectively connect the third pipe fitting with the first output tube or the third pipe fitting with the second output tube.

[0018] As a preferred technical solution of the standard device for quickly measuring micro flow rates, the second output pipe is connected to the liquid flow pool.

[0019] As a preferred technical solution of the standard device for quickly measuring micro-flow rates, the standard measuring vessel includes a weighing piece, and the weighing piece is configured to weigh the mass of the measured liquid in the standard measuring vessel.

[0020] As a preferred technical solution for the quick-measurement micro-flow standard device, the quick-measurement micro-flow standard device includes a flow regulating valve, which is arranged between the second pipe fitting and the first pipe fitting, and the flow regulating valve is configured to be able to regulate the flow of the second pipe fitting.

[0021] As a preferred technical solution for the fast measurement of small flow rate standard device, a pressure stabilizing module is provided on the first pipe fitting, and the pressure stabilizing module is arranged between the second pipe fitting and the power module. The pressure stabilizing module is configured to adjust the output pressure of the first pipe fitting to be less than or equal to a preset pressure.

[0022] Beneficial effects of the utility model:

[0023] The utility model provides a quick-measurement micro-flow standard device comprising a liquid flow pool, a first pipe fitting, a second pipe fitting, a third pipe fitting, a standard measuring instrument and a fourth pipe fitting, wherein the first pipe fitting is connected to the liquid flow pool, and a power module of the first pipe fitting can pump the measured liquid contained in the liquid flow pool into the second pipe fitting through the first pipe fitting; the flow meter of the second pipe fitting can detect the flow of the second pipe fitting; the measuring valve on the third pipe fitting can selectively block the connection between the third pipe fitting and the second pipe fitting; in order to improve the problem that it is difficult to obtain appropriate calibration data for micro-flow, a standard measuring instrument is connected to the third pipe fitting, on which a volume scale is arranged, and a drainage hole is opened at the first preset scale; at the same time The fourth pipe fitting is connected to the standard measuring vessel through the drainage hole. The drainage valve on the fourth pipe fitting can selectively block the fourth pipe fitting. By opening the drainage valve, the measured liquid exceeding the first preset scale in the standard measuring vessel is quickly discharged. After closing the drainage valve, the measuring valve is opened and the time is recorded. On the basis of the first preset scale of the standard measuring vessel, the measured liquid is injected until the measured liquid in the standard measuring vessel reaches a suitable calibration value. By calculating the difference, the calibration of the flow meter can also be completed, reducing the measured liquid injected into the standard measuring vessel after the calibration starts, thereby shortening the single calibration time of the fast measurement of small flow standard device, and achieving the purpose of improving calibration efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of a standard device for quickly measuring micro flow provided by a specific implementation method of the utility model.

[0025] In the figure:

[0026] 100, first pipe fitting; 110, power module; 120, voltage stabilizing module; 200, second pipe fitting; 210, flow meter; 300, third pipe fitting; 310, measuring valve; 400, fourth pipe fitting; 410, discharge valve; 500, fifth pipe fitting; 510, discharge valve;

[0027] 600, standard measuring instrument; 700, reversing member; 710, first output pipe; 720, second output pipe; 800, flow regulating valve; 900, liquid flow pool. DETAILED DESCRIPTION

[0028] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0029] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0031] In the description of this embodiment, the terms "upper", "lower", "right", etc., are based on the directions or positions shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0032] Specific as Figure 1As shown in the figure, the utility model discloses a fast-measurement micro-flow standard device, comprising a liquid flow pool 900, a first pipe fitting 100, a second pipe fitting 200, a third pipe fitting 300, a standard measuring device 600 and a fourth pipe fitting 400, wherein the liquid flow pool 900 contains a measured liquid, the first pipe fitting 100 is connected to the liquid flow pool 900, and a power module 110 is arranged on the first pipe fitting 100, and the power module 110 can pump the measured liquid out of the first pipe fitting 100 and into the second pipe fitting 200 connected to the first pipe fitting 100; the flow meter 210 is arranged on the second pipe fitting 200 to detect The flow rate of the second pipe fitting 200 is measured, and the measuring valve member 310 on the third pipe fitting 300 can selectively block the connection between the third pipe fitting 300 and the second pipe fitting 200, so as to control the measured liquid to be injected into the standard measuring vessel 600 connected to the third pipe fitting 300; in order to improve the problem that it is difficult to obtain suitable calibration data for a small flow rate, the standard measuring vessel 600 is provided with a volume scale thereon, and a drainage hole is opened at the first preset scale. At the same time, the fourth pipe fitting 400 is connected to the standard measuring vessel 600 through the drainage hole, and the drainage valve member 410 on the fourth pipe fitting 400 can selectively block the fourth pipe fitting 400. By opening the drain valve 410, the measured liquid in the standard measuring vessel 600 that exceeds the first preset scale is quickly discharged. After closing the drain valve 410, the measuring valve 310 is opened and the time is recorded. Based on the first preset scale of the standard measuring vessel 600, the measured liquid is injected until the measured liquid in the standard measuring vessel 600 reaches a suitable calibration value. The volume scale value at this time is read and subtracted from the first preset scale, and the result is divided by the recorded injection time, thereby obtaining the volume or mass of the measured liquid flowing through the flow meter 210 and injected into the standard measuring vessel 600 per unit time. By calculating the difference, the calibration of the flow meter 210 can also be completed, reducing the measured liquid injected into the standard measuring vessel 600 after the calibration begins, thereby shortening the single calibration time of the fast-measurement micro-flow standard device, and achieving the purpose of improving the calibration efficiency.

[0033] Specifically, a voltage stabilizing module 120 is also provided on the first pipe fitting 100. The voltage stabilizing module 120 is arranged between the second pipe fitting 200 and the power module 110, which can ensure the stability of the rear end pressure of the voltage stabilizing module 120 and can adjust the output pressure of the first pipe fitting 100 to be less than or equal to the preset pressure. The voltage stabilizing module 120 can protect the quick measurement of small flow standard device to avoid excessive internal pressure and can also improve the stability of the quick measurement of small flow standard device.

[0034] In this embodiment, the quick-measurement micro-flow standard device also includes a flow regulating valve 800, which is disposed between the second pipe fitting 200 and the first pipe fitting 100. The flow regulating valve 800 is configured to adjust the flow entering the second pipe fitting 200 according to actual demand conditions, thereby expanding the scope of application of the quick-measurement micro-flow standard device.

[0035] Furthermore, the standard measuring instrument 600 includes a temperature measuring component, which can monitor the temperature of the measured liquid in the standard measuring instrument 600 in real time. Since the temperature will have a great influence on the density of the measured liquid, incorporating the temperature into the variable of the calibration calculation can improve the accuracy and reliability of the calibration of the flow meter 210.

[0036] Exemplarily, the standard measuring vessel 600 includes a weighing piece, which can weigh the mass of the measured liquid in the standard measuring vessel 600 in real time. Since the standard measuring vessel 600 may be deformed due to environmental factors, the volume scale is likely to be inaccurate. In order to avoid this problem, the quick measurement of the small flow rate standard device retains the drainage hole as a reference value, and the weighing piece can be used to verify the mass of the measured liquid in the standard measuring vessel 600. When the measured liquid in the standard measuring vessel 600 reaches the appropriate calibration value, the mass of the measured liquid in the standard measuring vessel 600 is weighed again to verify the mass, and the difference between the two weighings is obtained to complete the calibration more accurately.

[0037] In this embodiment, the quick-measurement micro-flow standard device includes a reversing member 700, which is arranged between the third pipe 300 and the standard measuring device 600. The reversing member 700 includes a first output tube 710 and a second output tube 720. The reversing member 700 can selectively connect the third pipe 300 with the first output tube 710 or the third pipe 300 with the second output tube 720; at the same time, the first output tube 710 is connected to the standard measuring device 600. When the flow measured part needs to be calibrated, the third pipe 300 is connected to the first output tube 710, and the measured liquid can be injected into the standard measuring device 600 to complete the calibration; when the flow measured part does not need to be calibrated so that the quick-measurement micro-flow standard device can perform other work, the third pipe 300 is connected to the second output tube 720. Exemplarily, the second output tube 720 can be connected to the liquid flow pool 900, and the measured liquid can form a cycle in the quick-measurement micro-flow standard device so that the quick-measurement micro-flow standard device continues to generate flow.

[0038] Furthermore, one end of the fourth pipe 400 away from the standard measuring vessel 600 is also connected to the liquid flow pool 900, and the measured liquid in the standard measuring vessel 600 exceeding the first preset scale is discharged and enters the liquid flow pool 900, avoiding waste of the measured liquid and facilitating cost saving and green circulation.

[0039] Specifically, a discharge hole is provided at the bottom of the standard measuring vessel 600, and the quick-measurement micro-flow standard device includes a fifth pipe fitting 500, which is connected to the standard measuring vessel 600 through the discharge hole, and a discharge valve 510 is provided on the fifth pipe fitting 500, and the discharge valve 510 can selectively block the fifth pipe fitting 500. When the calibration is completed, the discharge valve 510 is opened, and the measured liquid in the standard measuring vessel 600 is completely discharged, so as to avoid storing the measured liquid that has not circulated for a long time, so as to prepare for the next calibration work; the standard measuring vessel 600 of the quick-measurement micro-flow standard device can still choose to use the traditional calibration method to calibrate the flow meter 210. It can be understood that the end of the fifth pipe fitting 500 away from the standard measuring vessel 600 can also be connected to the liquid flow pool 900, so that the measured liquid can be used repeatedly in the quick-measurement micro-flow standard device.

[0040] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of protection of the present invention. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.

Claims

1. A standard device for rapid measurement of micro flow, characterized in that: include: A liquid flow pool (900), wherein the liquid flow pool (900) contains a liquid to be tested; A first pipe (100), the first pipe (100) being in communication with the liquid flow pool (900), a power module (110) being disposed on the first pipe (100), the power module (110) being configured to pump the measured liquid out of the first pipe (100); a second pipe fitting (200), the second pipe fitting (200) being in communication with the first pipe fitting (100), a flow meter (210) being arranged on the second pipe fitting (200), the flow meter (210) being configured to detect the flow of the second pipe fitting (200); a third pipe fitting (300), the third pipe fitting (300) being in communication with the second pipe fitting (200), the third pipe fitting (300) being provided with a measuring valve (310), the measuring valve (310) being configured to selectively block the third pipe fitting (300); A standard measuring instrument (600), the standard measuring instrument (600) being in communication with the third pipe member (300), the standard measuring instrument (600) being provided with a volume scale, and the standard measuring instrument (600) being provided with a drainage hole at a first preset scale; A fourth pipe fitting (400), the fourth pipe fitting (400) is connected to the standard measuring device (600) through the drainage hole, and a drainage valve (410) is provided on the fourth pipe fitting (400), and the drainage valve (410) is configured to selectively block the fourth pipe fitting (400).

2. The rapid measurement of micro flow rate standard device according to claim 1 is characterized in that: The standard measuring vessel (600) comprises a temperature measuring element, and the temperature measuring element is configured to measure the temperature of the measured liquid in the standard measuring vessel (600).

3. The rapid measurement of micro flow rate standard device according to claim 1 is characterized in that: The bottom of the standard measuring vessel (600) is provided with a discharge hole. The quick-measurement micro-flow standard device comprises a fifth pipe fitting (500). The fifth pipe fitting (500) is connected to the standard measuring vessel (600) through the discharge hole. The fifth pipe fitting (500) is provided with a discharge valve (510). The discharge valve (510) is configured to selectively block the fifth pipe fitting (500).

4. The rapid measurement of micro flow rate standard device according to claim 3 is characterized in that: One end of the fifth pipe member (500) away from the standard measuring device (600) is connected to the liquid flow pool (900).

5. The rapid measurement of micro flow rate standard device according to claim 1 is characterized in that: One end of the fourth pipe (400) away from the standard measuring vessel (600) is in communication with the liquid flow pool (900).

6. The rapid measurement of micro flow rate standard device according to claim 1 is characterized in that: The fast-measurement micro-flow standard device comprises a reversing member (700), wherein the reversing member (700) is arranged between the third pipe member (300) and the standard measuring device (600), wherein the reversing member (700) comprises a first output tube (710) and a second output tube (720), wherein the first output tube (710) is connected to the standard measuring device (600), and the reversing member (700) is configured to selectively connect the third pipe member (300) with the first output tube (710) or the third pipe member (300) with the second output tube (720).

7. The rapid measurement of micro flow rate standard device according to claim 6, characterized in that: The second output pipe (720) is in communication with the liquid flow pool (900).

8. The rapid measurement of micro flow rate standard device according to any one of claims 1 to 7, characterized in that: The standard measuring vessel (600) comprises a weighing piece, and the weighing piece is configured to weigh the mass of the measured liquid in the standard measuring vessel (600).

9. The rapid measurement of micro flow rate standard device according to any one of claims 1 to 7, characterized in that: The quick-measurement micro-flow standard device comprises a flow regulating valve (800), wherein the flow regulating valve (800) is arranged between the second pipe (200) and the first pipe (100), and the flow regulating valve (800) is configured to be able to regulate the flow of the second pipe (200).

10. The rapid measurement of micro flow rate standard device according to any one of claims 1 to 7, characterized in that: The first pipe (100) is provided with a pressure stabilizing module (120), the pressure stabilizing module (120) is arranged between the second pipe (200) and the power module (110), and the pressure stabilizing module (120) is configured to be able to adjust the output pressure of the first pipe (100) to be less than or equal to a preset pressure.

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