Automatic calibration device of gas analyzer

Abstract

The utility model provides an automatic calibration device of a gas analyzer. The automatic calibration device comprises a gas analyzer sensor, the gas flow divider is arranged at the downstream section of the gas analyzer sensor through a first pipeline; the pump is connected with the gas flow divider through a second pipeline and is used for extracting gas from the first pipeline and the second pipeline; the standard gas source is connected with the gas flow divider through a third pipeline and supplies standard gas to the gas flow divider, and a first control valve and a second control valve are arranged on the second pipeline and the third pipeline respectively. The gas analyzer calibration device has the effects of solving the problems that the gas analyzer calibration device occupies a large space due to the complex gas path, and the gas analyzer sensor needs to be disassembled on site during calibration, so that the labor is wasted and the cost is high.

Description

Technical Field

[0001] Embodiments of the present disclosure generally relate to the field of sensor metrology, and more particularly, to an automatic calibration device for a gas analyzer. Background Art

[0002] Due to the complex working environment of the gas analyzer, the measurement zero point will drift as the working time increases. Zero point calibration is required every period of time, and the calibration cycle is half a year. However, the existing gas analyzer calibration device has a complex gas path, resulting in the calibration device taking up a large space, and the gas analyzer sensor needs to be disassembled on site during calibration, which wastes manpower and is costly. Utility Model Content

[0003] In order to solve the above-mentioned technical problems, the utility model provides an automatic calibration device for a gas analyzer, which solves the problem that the gas path of the gas analyzer calibration device is complicated, resulting in the calibration device occupying a large space, and the gas analyzer sensor needs to be disassembled on site during calibration, which wastes manpower and is costly.

[0004] The utility model provides an automatic calibration device for a gas analyzer, comprising: a gas analyzer sensor; a gas splitter, which is arranged at the downstream section of the gas analyzer sensor through a first pipeline; a pump, which is connected to the gas splitter through a second pipeline and evacuates the first pipeline and the second pipeline; and a standard gas source, which is connected to the gas splitter through a third pipeline and supplies standard gas to the gas splitter, and a first control valve and a second control valve are respectively arranged in the second pipeline and the third pipeline.

[0005] Furthermore, in the detection state, the pump is in an open state, the first control valve is in an open state, and the second control valve is in a closed state, and the gas to be detected flows out in sequence through the gas analyzer sensor, the first pipeline, the gas diverter, the second pipeline, and the pump.

[0006] Furthermore, in the calibration state, the pump is in a closed state, the first control valve is in a closed state, the second control valve is in an open state, and the standard gas enters the gas analyzer sensor via the third pipeline, the gas diverter, and the first pipeline in sequence.

[0007] Furthermore, there is an opening and closing unit, which includes a first control valve and a second control valve, for controlling the outflow of the gas to be detected from the gas analyzer sensor and the introduction of the standard gas into the gas analyzer sensor.

[0008] Furthermore, the first control valve and the second control valve are both solenoid valves.

[0009] Furthermore, the pump and the opening and closing unit are both connected to the control system.

[0010] Furthermore, one end of the first pipeline is connected to the gas analyzer sensor via a ferrule connector, and the other end is connected to the gas splitter via an elbow.

[0011] Furthermore, the second pipeline is connected to the gas diverter via a ferrule joint, and the second pipeline is connected to the first control valve via a flange.

[0012] Furthermore, the third pipeline is connected to the gas diverter via a ferrule joint, and the third pipeline is connected to the second control valve via a flange.

[0013] Furthermore, there are multiple third pipelines, corresponding to different standard gases, and there are also multiple second control valves.

[0014] The beneficial effects of the utility model are:

[0015] The invention solves the problem that the gas path of the gas analyzer calibration device is complicated, resulting in the calibration device occupying a large space, and the problem that the gas analyzer sensor needs to be disassembled on site during calibration, which wastes manpower and is costly.

[0016] It should be understood that the contents described in the utility model summary are not intended to limit the key or important features of the embodiments of the present disclosure, nor are they intended to limit the scope of the present disclosure. Other features of the present disclosure will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The above and other features, advantages and aspects of the embodiments of the present disclosure will become more apparent with reference to the following detailed description in conjunction with the accompanying drawings. In the accompanying drawings, the same or similar reference numerals represent the same or similar elements, wherein:

[0018] Figure 1 It is a three-dimensional schematic diagram of an automatic calibration device for a gas analyzer according to an embodiment of the utility model;

[0019] Figure 2 It is a schematic diagram of a gas path of a gas to be detected in an automatic calibration device for a gas analyzer according to an embodiment of the utility model;

[0020] Figure 3 This is a schematic diagram of a standard gas circuit a of a gas analyzer automatic calibration device according to an embodiment of the utility model;

[0021] Figure 4 This is a schematic diagram of a standard gas circuit b of a gas analyzer automatic calibration device according to an embodiment of the utility model;

[0022] in, Figures 1 to 4 The corresponding relationship between the reference numerals and component names in the figure is:

[0023] 10 pipeline, 110 first pipeline, 120 second pipeline, 130 third pipeline, 130a third pipeline, 130b third pipeline, 20 gas diverter, 30 opening and closing unit, 310 first control valve, 320 second control valve, 320a second control valve, 320b second control valve, 40 pump, 50 connecting unit, 510 ferrule joint, 510a ferrule joint, 510b ferrule joint, 510c ferrule joint, 510d ferrule joint, 510e ferrule joint, 510f ferrule joint, 520 elbow, 530 flange, 530a flange, 530b flange, 530c flange. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the embodiments of the present disclosure clearer, the technical solution in the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings in the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, not all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0025] In addition, the term "and / or" in this article is only a description of the association relationship between the associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0026] Figure 1 FIG. 1 is a three-dimensional schematic diagram of an automatic calibration device for a gas analyzer according to an embodiment of the present utility model. Figure 1 As shown, the automatic calibration device of the analyzer includes a pipeline 10 for transmitting gas, a gas diverter 20 for organizing and diverting gas, an opening and closing unit 30 for controlling different gases entering and exiting the gas analyzer and the gas analyzer sensor, a pump 40 for extracting gas, and a connecting unit 50.

[0027] In this embodiment, the gas analyzer automatic calibration device further includes a gas analyzer sensor, which is disposed at an upstream section of the gas splitter 20 .

[0028] In an embodiment, the automatic calibration device of the gas analyzer includes a gas circuit for the gas to be detected and a standard gas circuit. The gas circuit for the gas to be detected passes through the gas analyzer sensor, the first pipeline 110 in the pipeline 10, the gas diverter 20, the second pipeline 120 in the pipeline 10 and the pump 40 in sequence according to the gas flow direction; the standard gas circuit passes through the third pipeline 130 in the pipeline 10, the gas diverter 20, the first pipeline 110 in the pipeline 10 in sequence according to the gas flow direction from the standard gas source and enters the gas analyzer sensor; the gas to be detected and the standard gas enter and exit the gas analyzer sensor through the first pipeline 110.

[0029] In this embodiment, the opening and closing unit 30 includes a first control valve 310 and a second control valve 320, which are respectively used to control the outflow of the gas to be detected from the gas analyzer sensor and the introduction of the standard gas into the gas analyzer sensor.

[0030] In this embodiment, the opening and closing unit 30 and the pump 40 are both connected to the control system, and the opening and closing unit 30 and the pump 40 are opened and closed through the control system without manual calibration, thereby avoiding waste of manpower and reducing costs.

[0031] In this embodiment, the connection unit 50 includes a ferrule joint 510 , an elbow 520 and a flange 530 , which are used to connect the pipeline 10 with the gas analyzer sensor, the gas diverter 20 , the opening and closing unit 30 and the pump 40 .

[0032] Through the above arrangement, the gas path is shortened, the gas analyzer calibration device is miniaturized, and automatic calibration of the gas analyzer is achieved, thereby reducing costs.

[0033]

Gas path to be tested

[0034] Figure 2 FIG. 1 is a schematic diagram of a gas path of a gas analyzer automatic calibration device according to an embodiment of the utility model. Figure 2 As shown, the gas to be detected passes through the gas analyzer sensor, the first pipeline 110, the gas splitter 20, the second pipeline 120 and the pump 40 in sequence according to the gas flow direction and flows out.

[0035] In this embodiment, the gas analyzer sensor is arranged in the upstream section of the gas diverter 20 through the first pipeline 110. One end of the first pipeline 110 is connected to the gas diverter 20 via an elbow 520, and the elbow 520 is a right-angle elbow. The other end is connected to the gas analyzer sensor via a ferrule joint 510a.

[0036] In this embodiment, a main pipeline and a plurality of branch pipelines are provided in the gas diverter 20, and each branch pipeline is connected to the main pipeline respectively. The first pipeline 110 is connected to the main pipeline in the gas diverter 20 through an elbow 520, one end of the second pipeline 120 is connected to the branch pipeline in the gas diverter 20 through a ferrule joint 510b, and the other end is connected to the pump 40 through a flange. The pump 40 is a micro diaphragm pump, which evacuates the first pipeline 110 and the second pipeline 120. A first control valve 310 is provided in the middle section of the second pipeline 120 through a flange 530a, and the first control valve 310 is a solenoid valve.

[0037] In this embodiment, when detecting gas, the second control valve 320 is closed, the pump 40 is turned on, and the first control valve 310 is also turned on. The pump 40 continuously draws gas so that the gas to be detected flows out through the first pipeline 110, the gas diverter 20, the second pipeline 120 and the pump 40 after being detected by the gas analyzer sensor.

[0038]

Standard gas circuit

[0039] Figure 3 This is a schematic diagram of a standard gas circuit a of a gas analyzer automatic calibration device according to an embodiment of the utility model. Figure 4 Schematic diagram of standard gas circuit b of a gas analyzer automatic calibration device according to an embodiment of the utility model. Figure 3 to Figure 4 As shown, the standard gas path passes through the third pipeline 130, the gas splitter 20, and the first pipeline 110 in sequence from the standard gas source according to the gas flow direction and enters the gas analyzer sensor.

[0040] In this embodiment, the standard gas circuit and the gas circuit to be detected share the gas diverter 20 and the first pipeline 110. One end of the third pipeline 130 is connected to the branch pipeline in the gas diverter 20 through the compression fitting 510, and the other end is connected to the standard gas source through the compression fitting 510. The standard gas source supplies standard gas to the gas diverter 20 through the third pipeline 130. A second control valve 320 is provided in the middle section of the third pipeline 130 through a flange 530. The second control valve 320 is a solenoid valve. The standard gas circuit includes a standard gas circuit a and a standard gas circuit b, which correspond to different third pipelines 130 and different standard gases, respectively.

[0041] In this embodiment, one end of the third pipeline 130a in the standard gas circuit a is connected to the branch pipeline in the gas diverter 20 through a compression fitting 510c, and the other end is connected to the standard gas source a through a compression fitting 510d, and the middle section of the third pipeline 130a is provided with a second control valve 320a through a flange 530b; one end of the third pipeline 130b in the standard gas circuit b is connected to the branch pipeline in the gas diverter 20 through a compression fitting 510e, and the other end is connected to the standard gas source b through a compression fitting 510f, and the middle section of the third pipeline 130b is provided with a second control valve 320b through a flange 530c.

[0042] The second control valve 320 is connected to the control system, and the second control valve 320 is opened and closed through the control system without manual calibration, thereby avoiding waste of manpower and reducing costs.

[0043] In this embodiment, when calibrating the gas, the process is as follows:

[0044] Close the first control valve 310, turn off the pump 40, close the second control valve 320b, open the second control valve 320a, and the standard gas a flows from the standard gas source a through the third pipeline 130a, the gas diverter 20, and the first pipeline 110 into the gas analyzer sensor to complete the calibration of gas a.

[0045] After completing the calibration of gas a, close the second control valve 320a, continue to close the first control valve 310, continue to close the pump 40, open the second control valve 320b, and the standard gas b flows from the standard gas source b through the third pipeline 130b, the gas diverter 20, and the first pipeline 110 into the gas analyzer sensor to complete the calibration of gas b.

[0046] In this embodiment, there are two standard gas circuits, but it is not limited to this. According to user needs, multiple standard gas circuits can be set; in this embodiment, the third pipeline 130 is set corresponding to the standard gas circuit, and multiple ones can be set according to user needs, and multiple second control valves 320 can also be set.

[0047] The utility model provides a gas analyzer automatic calibration device, which achieves the following technical effects:

[0048] The second pipeline in the gas circuit of the gas to be detected and the third pipeline in the standard gas circuit are connected to the branch pipeline in the gas diverter through a ferrule joint, thereby sharing the first pipeline. Through the above arrangement, the gas circuit is shortened, and the problem that the gas analyzer calibration device has a complex gas circuit and causes the calibration device to occupy a large space is solved, so that the gas analyzer calibration device is miniaturized and the cost is reduced; the pump and the opening and closing unit are both connected to the control system, and the pump and the opening and closing unit are opened and closed through the control system, and manual calibration work is not required, which solves the problem of needing to disassemble the gas analyzer sensor on site when performing calibration work, avoids waste of manpower and reduces costs.

[0049] In the description of this specification, the terms "connection", "installation", "fixation" and the like should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0050] The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A gas analyzer automatic calibration device, characterized in that: include: Gas analyzer sensors; a gas splitter, which is disposed at a downstream section of the gas analyzer sensor through a first pipeline; a pump connected to the gas splitter via a second pipeline, for pumping gas from the first pipeline and the second pipeline; and a standard gas source, which is connected to the gas splitter through a third pipeline and supplies standard gas to the gas splitter, The second pipeline and the third pipeline are respectively provided with a first control valve and a second control valve.

2. The automatic calibration device according to claim 1, characterized in that: In the detection state, The pump is in an open state, The first control valve is in an open state, The second control valve is in a closed state. The gas to be detected flows out through the gas analyzer sensor, the first pipeline, the gas diverter, the second pipeline, and the pump in sequence.

3. The automatic calibration device according to claim 1, characterized in that: In the calibration state, The pump is in a closed state, The first control valve is in a closed state, The second control valve is in an open state, The standard gas enters the gas analyzer sensor via the third pipeline, the gas splitter, and the first pipeline in sequence.

4. The automatic calibration device according to claim 2, characterized in that: An opening and closing unit is provided, which includes the first control valve and the second control valve, and is used to control the outflow of the gas to be detected from the gas analyzer sensor and the introduction of the standard gas into the gas analyzer sensor.

5. The automatic calibration device according to claim 4, characterized in that: The first control valve and the second control valve are both solenoid valves.

6. The automatic calibration device according to claim 4, characterized in that: The pump and the opening and closing unit are both connected to a control system.

7. The automatic calibration device according to claim 1, characterized in that: One end of the first pipeline is connected to the gas analyzer sensor via a ferrule joint, and the other end is connected to the gas splitter via an elbow.

8. The automatic calibration device according to claim 7, characterized in that: The second pipeline is connected to the gas diverter via the ferrule joint, and the second pipeline is connected to the first control valve via a flange.

9. The automatic calibration device according to claim 8, characterized in that: The third pipeline is connected to the gas diverter via the ferrule joint, and the third pipeline is connected to the second control valve via the flange.

10. The automatic calibration device according to claim 1, characterized in that: There are multiple third pipelines, each corresponding to a different calibration gas, and there are multiple second control valves.

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