Gas circuit structure and gas measuring device

Abstract

The utility model provides a gas path structure and a gas measuring device. The gas path structure comprises a pipeline with a gas path input end and a gas path output end, and a first branch and a second branch which are arranged between the gas path input end and the gas path output end and are connected in parallel. The first branch is directly communicated to the gas path output end from the gas path input end; the second branch further comprises a digestion assembly, and the first branch communicates with the digestion assembly from the gas path input end and then communicates with the gas path output end through the digestion assembly. In order to reduce the time interval between the cleaning step and the measuring step in the gas measuring device, after reaction substances in the digestion assembly are waited in advance to generate measured gas, clean gas is introduced into the first branch and directly reaches the measuring assembly of the gas measuring device, and the pipeline and the measuring assembly in the gas measuring device are cleaned. After cleaning is completed, the first branch is closed, the second branch is connected, and the measured gas in the measuring assembly directly enters the measuring assembly, so that the intermediate waiting time is shortened, and the influence on the measuring precision is reduced.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of gas measuring devices, and more particularly relates to a gas path structure and a gas measuring device. BACKGROUND

[0002] Before use, a gas measuring device usually needs to undergo a cleaning step, in which clean gas is introduced into the internal pipeline of the gas measuring device to effectively remove the residual measurement substances, pollutants or impurities in the pipeline from the previous measurement, so as to avoid interference of the residual substances on the subsequent measurement results. After the cleaning step is completed, the measured gas generated by the reaction substances is introduced into the gas measuring device for measurement.

[0003] However, in actual operation, there is usually a certain time interval between the end of the cleaning step and the introduction of the measured gas into the measuring unit. During this time interval, the internal environment (such as temperature, pressure, etc.) of the gas measuring device may change, or the concentration of the measured gas may change due to gas diffusion, adsorption and other phenomena, thereby affecting the accuracy of the final measurement. CONTENT OF THE INVENTION

[0004] The purpose of the embodiment of the application is to provide a gas path structure and a gas measuring device to solve the technical problem of the large time interval between the cleaning step and the measurement step in the prior art, which affects the measurement accuracy.

[0005] To achieve the above purpose, the technical solution adopted by the application is:

[0006] A gas path structure is provided, comprising:

[0007] A pipeline having a gas path input end and a gas path output end, and a first branch and a second branch connected in parallel between the gas path input end and the gas path output end, the first branch being directly connected from the gas path input end to the gas path output end; the second branch further comprising a digestion assembly, the first branch being connected from the gas path input end to the digestion assembly, and then connected from the digestion assembly to the gas path output end;

[0008] When the gas path structure is working, gas passes through the first branch or the second branch from the gas path input end to the gas path output end.

[0009] As a further improvement of the above technical solution:

[0010] Optionally, the digestion assembly comprises a first digestion valve, a digestion module and a second digestion valve arranged in sequence along the gas flow direction in the second branch. The first digestion valve and the second digestion valve are arranged at the inlet end and the outlet end of the digestion module respectively. The digestion module is provided with a reaction substance which can generate the measured gas under certain conditions. When the pipeline and the measurement assembly in the gas measurement device are cleaned, the first digestion valve and the second digestion valve are in a closed state to prevent the cleaning gas from passing through the second branch, i.e. the cleaning gas from passing through the digestion module, so as to avoid the influence of the cleaning gas on the concentration and other physical and chemical parameters of the measured gas. When the measured gas needs to be measured, the first digestion valve and the second digestion valve are switched to an open state, so that the measured gas can flow into the measurement assembly, thereby completing the direct measurement of the measured gas.

[0011] Optionally, the gas path structure comprises a three-way valve, an input end of the three-way valve is connected to the gas path input end, a normally open output end of the three-way valve is connected to the first branch, and a normally closed output end of the three-way valve is connected to the second branch. The normally open output end and the normally closed output end can be switched by controlling the three-way valve.

[0012] Optionally, the gas path structure comprises a gas flow control device arranged between the gas path input end and the three-way valve. The gas flow control device can control the gas flow entering the three-way valve.

[0013] Optionally, the gas path structure comprises a measurement assembly arranged at the gas path output end.

[0014] Optionally, the gas path structure further comprises a three-way piece, the first branch is connected to a first port of the three-way piece, the second branch is connected to a second port of the three-way piece, and the gas path output end is connected to a third port of the three-way piece.

[0015] The application also provides a gas measurement device comprising the above gas path structure.

[0016] The gas path structure and the gas measurement device provided by the application have the following beneficial effects:

[0017] The gas path structure provided by the application comprises a pipeline having a gas path input end and a gas path output end, and a first branch and a second branch arranged in parallel between the gas path input end and the gas path output end. The first branch is directly communicated from the gas path input end to the gas path output end; the second branch further comprises a digestion assembly, the first branch is communicated from the gas path input end to the digestion assembly, and then communicated from the digestion assembly to the gas path output end.

[0018] The gas path structure is in use, the first branch is in a normally-on state, and the second branch is in a normally-off state. In order to reduce the time interval between the cleaning step and the measuring step in the gas measuring device, the reactant in the digestion assembly is allowed to generate the measured gas in advance, and then the cleaning gas is introduced into the first branch and directly into the measuring assembly of the gas measuring device, so as to clean and remove impurities in the pipeline and the measuring assembly of the gas measuring device. After the cleaning is completed, since the measured gas has been prepared in advance, the first branch is switched to the off state, and the second branch is switched to the on state, so that the measured gas in the measuring assembly directly enters the measuring assembly, and the gas measurement is completed, thereby shortening the waiting time and reducing the influence on the measurement accuracy.

[0019] The gas measuring device provided in the application comprises the gas path structure, and therefore has the advantages of the gas path structure. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the application, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative effort.

[0021] Figure 1 FIG. 1 is a structural schematic diagram of a gas path structure provided in the application;

[0022] Figure 2 FIG. 2 is a structural schematic diagram of another gas path structure provided in the application.

[0023] In the drawings, various reference signs represent:

[0024] 1, gas path input end; 2, gas path output end;

[0025] 3, first branch; 4, second branch;

[0026] 5, digestion assembly; 51, first digestion valve;

[0027] 52, digestion module; 53, second digestion valve;

[0028] 6, three-way valve; 7, gas flow control device;

[0029] 8, measuring assembly. DETAILED DESCRIPTION

[0030] The embodiments of the present application are described below in detail, examples of which are shown in the drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by reference to the drawings are exemplary, and are intended to explain the present application, and cannot be understood as a limitation of the present application.

[0031] In the description of the present application, it is to be understood that the orientations or positional relationships indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0032] In addition, the terms "first" and "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first" and "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0033] In the present application, unless otherwise specifically defined and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be connected inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0034] In the present application, unless otherwise specifically defined and limited, the first feature "above" or "below" the second feature can include the first and second features directly contacting, or the first and second features not directly contacting but contacting through another feature between them. Moreover, the first feature "above", "above" and "above" the second feature includes the first feature directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature includes the first feature directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0035] In addition, the technical solutions among various embodiments can be combined with each other, but it must be based on that a person skilled in the art can realize, when the combination of technical solutions appears contradictory or cannot be realized, it should be considered that the combination of technical solutions does not exist, and is also not within the scope of the present application.

[0036] In the following description, suffixes such as "circuit", "component", "assembly" or "unit" are used only for the convenience of description of the present application, and do not have a specific meaning. Therefore, they can be used mixedly.

[0037] The present application will be described in further detail below with specific embodiments in conjunction with the accompanying drawings.

[0038] The gas measurement device usually needs to go through a cleaning and impurity removing step before use. Clean gas is introduced into the internal pipeline of the gas measurement device to effectively remove the residual previous measurement substances, pollutants or impurities in the pipeline, so as to avoid interference of these residues on the subsequent measurement results. After the cleaning step is completed, the reaction substance generated by the measured gas is introduced into the gas measurement device for measurement.

[0039] However, in actual operation, there is often a certain time interval between the end of the cleaning step and the introduction of the measured gas into the measurement unit. During this time interval, the internal environment of the gas measurement device (such as temperature, pressure, etc.) can change, or the concentration of the measured gas can change due to gas diffusion, adsorption and other phenomena, thereby affecting the accuracy of the final measurement.

[0040] To solve the problem that the time interval between the cleaning step and the measurement step in the gas measurement device is large, thereby affecting the measurement accuracy, as shown in Figure 1 The gas path structure provided by the present application includes a pipeline having a gas path input end 1 and a gas path output end 2, and a first branch 3 and a second branch 4 connected in parallel between the gas path input end 1 and the gas path output end 2. The first branch 3 is directly connected from the gas path input end 1 to the gas path output end 2; the second branch 4 further includes a digestion assembly 5, and the first branch 3 is connected from the gas path input end 1 to the digestion assembly 5, and then connected from the digestion assembly 5 to the gas path output end 2. When the gas path structure works, the gas is selectively passed through the first branch 3 or the second branch 4 from the gas path input end 1 to the gas path output end 2.

[0041] In operation, the first branch 3 is normally open, and the second branch 4 is normally closed. To minimize the time interval between the cleaning and measurement steps in the gas measuring device, the gas to be measured is introduced into the first branch 3 after the reactants in the digestion component 5 have generated the gas to be measured. This clean gas then reaches the measuring component 8 of the gas measuring device to clean and remove impurities from the pipelines and the measuring component 8. After cleaning, since the gas to be measured has been prepared in advance, the first branch 3 can be switched to the closed state, and the second branch 4 can be switched to the open state. This allows the gas to be measured directly into the measuring component 8, completing the measurement of the gas's physicochemical parameters. This shortens the waiting time and reduces the impact on measurement accuracy.

[0042] like Figure 1 As shown, in a specific embodiment of this application, the digestion component 5 includes a first digestion valve 51, a digestion module 52, and a second digestion valve 53 sequentially arranged along the gas flow direction in the second branch 4. The first digestion valve 51 and the second digestion valve 53 are respectively located at the inlet and outlet of the digestion module 52. The digestion module 52 contains a reactive substance that can generate the gas to be measured under certain conditions. When cleaning the pipelines and measuring components 8 in the gas measuring device, the first digestion valve 51 and the second digestion valve 53 are in a closed state, preventing clean gas from passing through the second branch 4, that is, preventing clean gas from passing through the digestion module 52, thereby avoiding the clean gas affecting the concentration and other physicochemical parameters of the gas to be measured. When it is necessary to measure the gas to be measured, the first digestion valve 51 and the second digestion valve 53 are switched to the open state, allowing the gas to flow into the measuring component 8, thereby completing the direct measurement of the gas to be measured.

[0043] like Figure 1 As shown, in a specific embodiment of this application, the gas path structure includes a three-way valve 6. The three-way valve 6 is used to control the flow direction of gas in the gas path structure. The input end of the three-way valve 6 is connected to the gas path input end 1, the normally open output end of the three-way valve 6 is connected to the first branch 3, and the normally closed output end of the three-way valve 6 is connected to the second branch 4. The opening and closing of the normally open and normally closed output ends can be switched by controlling the three-way valve 6.

[0044] like Figure 1 As shown, in one specific embodiment of this application, the gas path structure includes a gas flow control device 7, which is disposed between the gas path input end 1 and the three-way valve 6. The gas flow control device 7 can control the gas flow rate entering the three-way valve 6.

[0045] like Figure 1 As shown, in one specific embodiment of this application, the gas path structure includes a measuring component 8, which is disposed at the gas path output end 2. The measuring component 8 is used to measure the physicochemical parameters of the gas being measured.

[0046] like Figure 1 As shown, in one specific embodiment of this application, the gas path structure further includes a three-way connector. A first branch 3 is connected to a first port of the three-way connector, a second branch 4 is connected to a second port of the three-way connector, and a gas path output terminal 2 is connected to a third port of the three-way connector. The first branch 3 and the second branch 4 both converge at the three-way connector and are then connected to the gas path output terminal 2 through the third port of the three-way connector.

[0047] like Figure 2 As shown, in a specific embodiment of this application, the gas path structure may not include the digestion component 5. Instead, the gas to be measured is prepared in advance. After the clean gas has finished cleaning and removing impurities from the pipeline and measuring component 8 in the gas measuring device, the gas to be measured is directly introduced into the measuring component 8 through the second port of the three-way fitting, thereby completing the gas measurement in the shortest possible time interval.

[0048] This application provides a gas measuring device, which includes the gas path structure in the above embodiments, and therefore also has the advantages of the gas path structure in the above embodiments.

[0049] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A gas path structure, characterized in that, include: A pipeline having a gas inlet (1) and a gas outlet (2), and a first branch (3) and a second branch (4) connected in parallel between the gas inlet (1) and the gas outlet (2). The first branch (3) is directly connected from the gas inlet (1) to the gas outlet (2). The second branch (4) further includes a digestion component (5). The first branch (3) is connected from the gas inlet (1) to the digestion component (5), and then from the digestion component (5) to the gas outlet (2). When the gas path structure is working, the gas enters from the gas path input end (1) and passes through either the first branch (3) or the second branch (4) to the gas path output end (2).

2. The gas path structure as described in claim 1, characterized in that, The digestion assembly (5) includes a first digestion valve (51), a digestion module (52), and a second digestion valve (53) arranged sequentially along the gas flow direction in the second branch (4).

3. The gas path structure as described in claim 1, characterized in that, Includes a three-way valve (6), the input end of which is connected to the air circuit input end (1), the normally open output end of which is connected to the first branch (3), and the normally closed output end of which is connected to the second branch (4).

4. The gas path structure as described in claim 3, characterized in that, It includes a gas flow control device (7), which is located between the gas inlet (1) and the three-way valve (6).

5. The gas path structure as described in claim 1, characterized in that, It includes a measuring component (8), which is located at the gas output end (2).

6. The gas path structure as described in claim 1, characterized in that, It also includes a three-way connector, wherein the first branch (3) is connected to the first port of the three-way connector, the second branch (4) is connected to the second port of the three-way connector, and the air output terminal (2) is connected to the third port of the three-way connector.

7. A gas measuring device, characterized in that, Includes the gas path structure as described in any one of claims 1 to 6.

Images