Gas flow online detection device and method

Abstract

The invention provides a gas flow online detection device and method.The device comprises a filter, a detection unit and a rotor flowmeter, the filter is arranged between an input port and the detection unit and used for filtering impurities in input gas; the detection unit comprises a detection sensor and a digital display operation panel and is used for detecting flow values of different types of detected gases; the rotor flow meter is arranged between the output port and the detection unit and used for judging whether the gas flow is normal or not. The gas detection device is simple to operate, wide in gas detection range, wide in measuring range, convenient and fast to switch different types of gas, free of recalibration, fast in data result response and capable of meeting user requirements.

Description

Technical Field

[0001] The present invention relates to the technical field of flow detection, and in particular to a gas flow online detection device and method. Background Art

[0002] In modern scientific research and technological development, gas flow detection technology plays a vital role. It is widely used in many fields such as chemistry, metallurgy, physics, biology, and environmental science, providing a strong guarantee for the accuracy and safety of experiments. Gas flow detection refers to the measurement of gas flow velocity and volume, which is crucial to the accuracy and safety of experiments. Therefore, gas flow detection is not only a key link in experimental control, but also the basis for ensuring the accuracy of experimental results and experimental safety. There are a large number of gas facilities and equipment in the laboratories of research units. The accuracy of the input value of gas flow determines the accuracy of experimental data. The gas flow meters in the laboratory should be regularly tested and calibrated. Therefore, the laboratory urgently needs a special device that can detect laboratory gas flow online. It is best to have a set of equipment that can detect different gas devices and methods. Summary of the invention

[0003] According to the technical problem raised above, a gas flow online detection device and method are provided. The present invention mainly utilizes a filter, a detection unit and a rotor flowmeter to detect the mass flow value and volume flow value of the detected gas in real time according to the types of the detected gas.

[0004] The technical means adopted by the present invention are as follows:

[0005] A gas flow online detection device comprises: a filter, a detection unit and a rotor flowmeter, wherein:

[0006] The filter is arranged between the input port and the detection unit, and is used to filter impurities in the input gas;

[0007] The detection unit includes a detection sensor and a digital display operation panel, which are used to detect the flow values ​​of different types of detected gases;

[0008] The rotor flowmeter is arranged between the output port and the detection unit, and is used to determine whether the gas flow is normal.

[0009] Furthermore, the digital display operation panel is used to select and switch the category of the detected gas, and the detection sensor is used to monitor the mass flow value and volume flow value in the input gas in real time and display them on the digital display operation panel.

[0010] Furthermore, the device is provided with two independent detection gas paths, path A and path B, which can be used simultaneously, one for use and the other for backup, or used in series.

[0011] Furthermore, the device also includes a valve for controlling the inflow and outflow of gas.

[0012] Furthermore, the input port and the output port are both connected to the detected device using stainless steel quick plugs.

[0013] The present invention also includes a gas flow online detection method, comprising:

[0014] S1. Connect the output end of the gas pipeline of the measured device to the input port through a quick plug, and connect the output port of the same pipeline to the input end of the measured device through a quick plug to keep the gas circuit forming a complete closed loop;

[0015] S2. Select the type of gas to be detected on the digital display operation panel of the detection unit and confirm;

[0016] S3, open the valve, the gas to be detected is filtered through the filter and flows into the detection unit, and the mass flow value and volume flow value of the gas to be detected are measured in real time by the detection sensor;

[0017] S4. After being detected by the detection unit, the detected gas flows into the glass rotor flowmeter, the glass rotor flowmeter is in the fully open position, and the input value of the gas flow is read;

[0018] S5. After the detection value displayed on the digital display operation panel stabilizes, record the actual measured value and the detection is completed.

[0019] Compared with the prior art, the present invention has the following advantages:

[0020] The gas flow online detection device and method provided by the present invention are simple to operate, have a wide range of detected gases, and a wide measuring range. It is convenient and quick to switch between different types of gases, does not require recalibration, and has fast data results, which can meet user needs.

[0021] Based on the above reasons, the present invention can be widely promoted in the field of flow detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0023] Figure 1 It is a schematic structural diagram of the gas flow online detection device of the present invention.

[0024] In the figure: 1. valve; 2. filter; 3. detection unit; 4. rotor flowmeter. DETAILED DESCRIPTION

[0025] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0026] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0028] Unless otherwise specifically stated, the relative arrangement of the parts and steps described in these embodiments, the numerical expressions and numerical values ​​do not limit the scope of the present invention. At the same time, it should be clear that, for ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0029] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention: the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0030] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below their position devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0031] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0032] like Figure 1 As shown, the present invention provides a gas flow online detection device, comprising: a filter 2, a detection unit 3 and a rotor flowmeter 4, wherein:

[0033] The filter 2 is arranged between the input port and the detection unit 3, and is used to filter impurities in the input gas; it can ensure that the detection unit works in a clean environment, and extend the service life of the detection unit.

[0034] The detection unit 3 includes a detection sensor and a digital display operation panel, which are used to detect the flow values ​​of different types of detected gases;

[0035] The rotor flowmeter 4 is arranged between the output port and the detection unit 3 to determine whether the gas flow is normal and ensure the safety of equipment and facilities.

[0036] In specific implementation, as a preferred embodiment of the present invention, it is characterized in that the digital display operation panel is used to select and switch the category of the detected gas, and the detection sensor is used to monitor the mass flow value and volume flow value in the input gas in real time, and display them on the digital display operation panel, displaying the value to 3 decimal places.

[0037] In specific implementation, as a preferred embodiment of the present invention, the device is provided with two independent detection gas paths, path A and path B, which can be used simultaneously, one for use and the other for backup, or used in series.

[0038] The present invention is provided with two independent detection units, which can realize one for use and one for backup, or the two can be used simultaneously, or can be used in series to obtain an average value, so that the detection data is more accurate.

[0039] In specific implementation, as a preferred embodiment of the present invention, the device further includes a valve 1 for controlling the inflow and outflow of gas.

[0040] In specific implementation, as a preferred embodiment of the present invention, the input port and the output port are both connected to the detected device using stainless steel quick plugs, and the disassembly is simple, convenient and fast.

[0041] The present invention also includes a gas flow online detection method, comprising:

[0042] S1. Connect the output end of the gas pipeline of the measured device to the input port through a quick plug, and connect the output port of the same pipeline to the input end of the measured device through a quick plug to keep the gas circuit forming a complete closed loop;

[0043] S2. Select the type of gas to be detected on the digital display operation panel of detection unit 3 and confirm; if the measured gas is N2, select N2 on the digital display operation panel on measurement unit ③.

[0044] S3, open valve 1, the gas to be detected is filtered by filter 2 and flows into detection unit 3, and the mass flow value and volume flow value of the gas to be detected are measured in real time by the detection sensor;

[0045] S4, after being detected by the detection unit 3, the detected gas flows into the glass rotor flowmeter 4, the glass rotor flowmeter 4 is in the fully open position, and the input value of the gas flow is read;

[0046] S5. After 5-10 seconds, wait for the test value displayed on the digital display operation panel to stabilize, record the actual measured value, and the test is completed.

[0047] If you need to change to another gas for detection, turn off valve 1 and the upstream switch on the measured gas pipeline, reopen the valve of the new gas to be detected, re-select the corresponding detection gas category on the digital display operation panel of the detection unit 3 and confirm it, open valve 1 again, and after 5-10 seconds, the digital display operation panel of the detection unit will again display a stable value of the changed gas category. If you need to re-detect a new type of gas, repeat this step.

[0048] Example 1

[0049] like Figure 1 As shown, the present invention provides a gas flow online detection device and method, the principle of which is that the gas passes through the input port of the A-way, passes through the shut-off valve 1 along the trachea, and then continues to pass through the filter 2 to filter out foreign matter in the gas, ensuring that the clean gas flows to the detection unit 3, and switches the corresponding category on the digital display operation panel according to different gas categories, including conventional gases used. After the flow is stable, the corresponding measurement reading is displayed on the digital display operation panel. The gas continues to flow to the glass rotor flowmeter 4, and the glass rotor flowmeter 4 can intuitively display the approximate value of the gas to ensure that the flow direction of the gas is correct. The gas finally flows to the output port and enters the online detection equipment. The present invention adopts a one-for-one design. The A-way and B-way gas paths can work simultaneously and detect gas online in two ways without conflicting with each other. They can also be used in series to obtain the value and find the average, so that the detection data is more accurate.

[0050] Table 1 shows the online detection results of the present invention and the wet flow meter under the same conditions. By comparison, it can be seen that the detection value of the present invention is more accurate.

[0051] Table 1 Online detection comparison table of the present invention and the wet flow meter under the same conditions

[0052]

[0053]

[0054] When measuring gas flow with a wet flow meter, first place the instrument on a stable platform, ensure that the instrument is in a horizontal position, control the ambient temperature at 15-25℃, and make sure that the air temperature is the same as the room temperature. Connect the instrument in series in the gas path of the device to be measured. Add distilled water to the instrument until water overflows from the water level drain of the instrument. Input the gas to be measured, and after the instrument pointer runs for several weeks, use a timer to read the flow value in units of minutes (within one minute, the value obtained by subtracting the initial value from the final value). When measuring gas flow with a wet flow meter, the operation is cumbersome, the reading of the value is troublesome, and the value obtained is only an integer, with a relatively large error.

[0055] Through two sets of actual detection data, the actual results of the present invention are more accurate, simple to operate, high in safety factor, wide in detection gas range, and wide in measuring range. Switching between different types of gases is convenient and fast, no recalibration is required, and the data results are fast, which can meet user needs.

[0056] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A gas flow online detection device, characterized in that: include: A filter (2), a detection unit (3) and a rotor flow meter (4), wherein: The filter (2) is arranged between the input port and the detection unit (3) and is used to filter impurities in the input gas; The detection unit (3) comprises a detection sensor and a digital display operation panel, which are used to detect the flow values ​​of different types of detected gases; The rotor flowmeter (4) is arranged between the output port and the detection unit (3) and is used to determine whether the gas flow is normal.

2. The gas flow online detection device according to claim 1, characterized in that: The digital display operation panel is used to select and switch the category of the detected gas, and the detection sensor is used to monitor the mass flow value and volume flow value in the input gas in real time and display them on the digital display operation panel.

3. The online detection device according to claim 1, characterized in that: The device is provided with two independent detection gas paths, path A and path B, which can be used simultaneously, one for use and the other for backup, or used in series.

4. The online detection device according to claim 1, characterized in that: The device also includes a valve (1) for controlling the inflow and outflow of gas.

5. The online detection device according to claim 1, characterized in that: The input port and the output port are both connected to the detected equipment by stainless steel quick plugs.

6. A method for online detection of gas flow, characterized in that: include: S1. Connect the output end of the gas pipeline of the measured device to the input port through a quick plug, and connect the output port of the same pipeline to the input end of the measured device through a quick plug to keep the gas circuit forming a complete closed loop; S2. Select the type of gas to be detected on the digital display operation panel of the detection unit (3) and confirm; S3, opening the valve (1), the gas to be detected is filtered through the filter (2), and then flows into the detection unit (3), and the mass flow value and volume flow value of the gas to be detected are measured in real time by the detection sensor; S4, after being detected by the detection unit (3), the detected gas flows into the glass rotor flowmeter (4), the glass rotor flowmeter (4) is in a fully open position, and the input value of the gas flow is read; S5. After the detection value displayed on the digital display operation panel stabilizes, record the actual measured value and the detection is completed.

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