Gas water content and oxygen content integrated analyzer

Abstract

The utility model relates to the technical field of gas analysis, in particular to a gas water content and oxygen content integrated analyzer. Comprising a dew point sensor, a sampling chamber of the dew point sensor, an oxygen sensor and a sampling chamber of the oxygen sensor, a sample gas input interface and a sample gas discharge interface which are arranged in an instrument shell, a pressure stabilizing valve, a flow meter with a flow adjusting function and a four-way valve which are used for adjusting the pressure, the flow and the flow direction in a gas path, the display screen and the circuit board are used for processing sensor signals, and the connecting pipeline is connected with the gas circuit component to form an instrument internal gas circuit. The traditional gas water oxygen analysis process needs to respectively use an oxygen content analyzer and a water content analyzer, and the instrument disclosed by the utility model can be used for simultaneously measuring the water content and the oxygen content in the gas, so that the time consumption of the process is shortened, two times of purging in the traditional process are reduced to one time, the gas consumption and the operation steps are reduced, and the cost is reduced. And interference caused by atmosphere introduction during pipeline connection is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to gas analysis technical field, concretely is a kind of gas water content oxygen content integrated analyzer. BACKGROUND

[0002] Currently in industrial gas oxygen content and water content determination process, need to use oxygen content analyzer and water content analyzer two kinds of instruments respectively, in the measurement process, the measured sample gas is introduced into one of the instruments through pipeline first, after being fully purged, sample gas is guided into sensor by regulating valve, after waiting for a period of time, obtain a reading, then manually disconnect gas path connection, the measured sample gas is introduced into another instrument again, repeat the previous steps, obtain another reading. Such operation process exists twice pipeline connection, thus introducing twice atmospheric gaseous water and oxygen interference, need to purge gas path for two instruments, need to wait for the response of two instruments.

[0003] Therefore, it is urgent to integrate the functions of oxygen content analyzer and water content analyzer, reduce the number of gas path connections to reduce the burden of manual operation, while reducing the interference of water and oxygen infiltration from the atmosphere when connecting the instruments once, improve the measurement accuracy, reduce the gas path purging time and the instrument response waiting time once in each sample gas measurement process, improve the detection efficiency. UTILITARY MODEL

[0004] One of the main purposes of the utility model is to integrate the technologies in the above two detection instruments and eliminate the interference between sensors, design an instrument that is convenient to operate, measures quickly and measures water content and oxygen content in gas at the same time.

[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme: a kind of gas water content oxygen content integrated analyzer, including dew point sensor and its sampling chamber, oxygen sensor and its sampling chamber, sample gas input interface, sample gas discharge interface, instrument shell, display screen, circuit board, connecting pipeline, pressure stabilizing valve, flow meter with flow regulating function, four-way valve. The measured sample gas is connected to the sample gas input interface by the pipeline outside the instrument, and is distributed to the dew point sensor and its sampling chamber and the oxygen sensor and its sampling chamber for analysis through the connecting pipeline inside the instrument shell, and is discharged by the sample gas discharge interface after analysis is completed;The display screen and the circuit board are electrically connected with the above two sensors;The dew point sensor and its sampling chamber are connected in series or in parallel with the oxygen sensor and its sampling chamber inside the instrument shell to form a gas path;The instrument shell is a box, and other components are fixed on the surface and inside the box, forming a portable gas analyzer that can analyze water content and oxygen content at the same time.

[0006] Further limited, the instrument shell is fixed and protects the other components by mechanical connection; the display screen is installed on the surface of the instrument shell; the pressure stabilizing valve is installed in the front stage of the flow meter with flow regulation function; the flow meter with flow regulation function is installed in the front stage of the four-way valve; the four-way valve is installed in the front stage of the sample gas discharge interface.

[0007] Further limited, the four-way valve is a two-position four-way valve, which is connected in parallel with the oxygen sensor and its sampling chamber in the gas circuit, and switches the oxygen sensor and its sampling chamber between two states by rotating the valve core: connecting into the gas circuit to receive the measured sample gas, and isolating from the gas circuit to close the oxygen sensor.

[0008] Further limited, when the dew point sensor and its sampling chamber and the oxygen sensor and its sampling chamber are connected in series in the internal gas circuit, they are connected by the connecting pipeline and form a front and rear relationship, the dew point sensor and its sampling chamber are in the front stage, and the oxygen sensor and its sampling chamber are in the rear stage, and the measured sample gas first passes through the dew point sensor and then passes through the oxygen sensor after being analyzed by the dew point sensor.

[0009] Further limited, when the dew point sensor and its sampling chamber and the oxygen sensor and its sampling chamber are connected in parallel to form the internal gas circuit, one end of the dew point sensor and its sampling chamber is connected to the sample gas discharge interface in the rear stage of the oxygen sensor and its sampling chamber, and the other end is connected to the front stage component of the oxygen sensor and its sampling chamber, the measured sample gas is divided into two paths and passes through the dew point sensor and the oxygen sensor respectively.

[0010] Further limited, between the front stage component and the rear stage component, under the condition of ensuring the correct front and rear relationship, other components are allowed to be connected through the connecting pipeline; under the condition of correct front and rear relationship of each component, the actual connection relationship between the components is changed without affecting the function of the instrument.

[0011] Further limited, the instrument shell is made of metal material, the circuit negative electrode of the circuit board is connected with the instrument shell; the dew point sensor and its sampling chamber, the oxygen sensor and its sampling chamber, the connecting pipeline, the pressure stabilizing valve, the flow meter with flow regulation function, and the four-way valve are connected with the instrument shell, and the above components are electrically connected to form a common ground shielding layer.

[0012] Further limited, the oxygen sensor and its sampling chamber are composed of a sampling chamber shell, a sensor support and an oxygen sensor, the sensor support and the oxygen sensor are covered inside the sampling chamber shell, the oxygen sensor is held by the sensor support, and the oxygen sensor has no direct contact with the sampling chamber shell.

[0013] According to the above technical scheme, the gas water content oxygen content integrated analyzer has the following beneficial effects:

[0014] The utility model discloses a portable dew point sensor and oxygen sensor integrated instrument, which is characterized by the following: a dew point sensor and an oxygen sensor are arranged in a portable instrument shell; a single sample gas input interface is used to input the measured sample gas; the sample gas is distributed to the dew point sensor and the oxygen sensor through a connecting pipeline for simultaneous detection; the functions of two instruments used in the traditional analysis process are integrated; the mutual interference between the sensors is eliminated through the reasonable connection of the internal pipeline; in the measurement process of the water content and oxygen content of the gas, the operation steps are reduced, the interference introduced by the atmosphere is reduced, and the detection time is shortened. BRIEF DESCRIPTION OF DRAWINGS

[0015] The accompanying drawings are included to provide a further understanding of the utility model, and constitute a part of the specification, and are used to explain the utility model together with embodiments of the utility model, and do not constitute the limitation to the utility model. In the drawings:

[0016] Figure 1 It is the internal structure diagram of the utility model, and the dew point sensor and the sampling chamber thereof and the oxygen sensor and the sampling chamber thereof are in series connection mode;

[0017] Figure 2 It is the appearance diagram of the utility model;

[0018] Figure 3 It is the structure diagram of the oxygen sensor and the sampling chamber thereof;

[0019] Figure 4 It is the flow chart of an optional embodiment of the utility model, and the dew point sensor and the sampling chamber thereof and the oxygen sensor and the sampling chamber thereof are in series connection mode;

[0020] Figure 5 It is the flow chart of an optional embodiment of the utility model, and the dew point sensor and the sampling chamber thereof and the oxygen sensor and the sampling chamber thereof are in series connection mode;

[0021] Figure 6 It is the flow chart of an optional embodiment of the utility model, and the dew point sensor and the sampling chamber thereof and the oxygen sensor and the sampling chamber thereof are in parallel connection mode;

[0022] In the drawings: 1-dew point sensor and sampling chamber thereof, 2-oxygen sensor and sampling chamber thereof, 3-sample gas input interface, 4-sample gas discharge interface, 5-instrument shell, 6-display screen, 7-circuit board, 8-connecting pipeline, 9-pressure stabilizing valve, 10-flow meter with flow adjusting function, 11-four-way valve, 201-sampling chamber shell, 202-sensor support, 203-oxygen sensor. DETAILED DESCRIPTION

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0024] like Figure 1 As shown, this utility model discloses an integrated gas water and oxygen content analyzer, comprising a dew point sensor and its sampling chamber 1, an oxygen sensor and its sampling chamber 2, a sample gas input interface 3, a sample gas discharge interface 4, an instrument housing 5, a display screen 6, a circuit board 7, connecting pipes 8, a pressure regulating valve 9, a flow meter with flow regulation function 10, and a four-way valve 11. The sample gas to be measured is input to the sample gas input interface 3 through the external connecting pipes. The connecting pipes 8 include multiple pipes inside the instrument, through which the sample gas is distributed to the dew point sensor and its sampling chamber 1 and the oxygen sensor and its sampling chamber 2 for simultaneous analysis. The data and electrical signals generated by the sensors are transmitted to the circuit board 7 for processing, and the processed results are displayed on the display screen 6. Since there are two types of sensors, it is necessary to select either a series or parallel connection method to connect the sensors to the gas path inside the instrument. Here, series and parallel connection refer to the relative connection relationship of the two sensors in the gas path; both connection methods are feasible for achieving the function. The instrument described in this utility model is a portable instrument. The outer shell 5 of the instrument is a box, and other components are housed and fixed on its surface and inside. During use, the instrument can be carried by hand and its position can be moved quickly. Before use, only a single pipeline needs to be connected to the sample gas input interface 3 to simultaneously analyze the water content and oxygen content in the sample gas.

[0025] The components of the instrument have a specific installation sequence. The pressure regulating valve 9 provides a stable gas pressure to the flow meter 10 with flow regulation function. When the pressure input from the sample gas input interface 3 changes, the pressure output by the pressure regulating valve 9 remains constant. Therefore, the pressure regulating valve 9 is installed before the flow meter 10 with flow regulation function to ensure that the flow rate displayed by the flow meter 10 with flow regulation function does not change due to changes in external input pressure. The main purpose of the flow meter 10 with flow regulation function is to indicate the flow rate for the oxygen sensor and its sampling chamber 2. Therefore, the flow meter 10 with flow regulation function is installed before the four-way valve 11. The four-way valve 11 is a two-position four-way valve, connected in parallel with the oxygen sensor and its sampling chamber 2 in the gas path. By rotating the valve core, the oxygen sensor and its sampling chamber 2 switch between two states: connected to the gas path to receive the sample gas to be measured, and isolated from the gas path to close the oxygen sensor. When the instrument is not in use, rotating the four-way valve 11 isolates the oxygen sensor from the gas path. The four-way valve 11 is connected to the sample gas discharge interface 4, through which the sample gas to be measured is discharged from the instrument.

[0026] In actual implementation, one of the two schemes of series connection and parallel connection is selected to connect the dew point sensor and its sampling chamber 1 and the oxygen sensor and its sampling chamber 2. The two schemes have their own advantages and disadvantages, and cannot be directly compared. The advantages and disadvantages of the two schemes are analyzed below, and the specific implementation is described.

[0027] When the dew point sensor and its sampling chamber 1 and the oxygen sensor and its sampling chamber 2 are connected in series, they are connected through the connecting pipeline 8 and form a front and rear relationship. The dew point sensor and its sampling chamber 1 are in the front stage, and the oxygen sensor and its sampling chamber 2 are in the rear stage. The measured sample gas first passes through the dew point sensor and then passes through the oxygen sensor after being analyzed by the dew point sensor. Since the dew point of the measured sample gas is related to its pressure, and there are the oxygen sensor and its sampling chamber 2 and other components in the rear stage of the dew point sensor and its sampling chamber 1, there is resistance when the gas flows through these components, resulting in that the pressure at the dew point sensor and its sampling chamber 1 is not equal to atmospheric pressure. Therefore, the pressure at the dew point sensor needs to be measured in the series connection scheme. At the same time, since the measured sample gas passes through the two sensors in sequence, the amount of sample gas can be reduced.

[0028] When the dew point sensor and its sampling chamber 1 and the oxygen sensor and its sampling chamber 2 are connected in parallel, as shown in Figure 6 , one end of the dew point sensor and its sampling chamber 1 is connected to the sample gas discharge interface 4 of the rear stage of the oxygen sensor and its sampling chamber 2, and the other end is connected to the components in the front stage of the oxygen sensor and its sampling chamber 2. The measured sample gas is divided into two paths and passes through the dew point sensor and the oxygen sensor respectively. In this way, the pressure at the dew point sensor and its sampling chamber 1 is equal to atmospheric pressure, so the pressure at the dew point sensor does not need to be measured in the parallel connection scheme. However, since the measured sample gas passes through the two sensors respectively, the amount of sample gas is increased.

[0029] Between the front stage components and the rear stage components, other components are allowed to be connected through the connecting pipeline 8 under the condition that the front and rear relationships are correct. The actual connection relationship between the components can be changed under the condition that the front and rear relationships of the components are correct. The constraint of the front and rear relationships ensures that the components can work normally. Under the condition of meeting the constraint, adjusting the connection order between the components can achieve different beneficial effects, such as Figure 4 : After the sample gas input interface 3 is connected to the pressure stabilizing valve 9, the pressure stabilizing valve 9 is connected to the flow meter 10 with flow regulation function, and then the connecting pipeline 8 is connected to the four-way valve. The dew point sensor and its sampling chamber 1 and the oxygen sensor and its sampling chamber 2 are connected to the four-way valve 11 at the same time. The four-way valve 11 is connected to the sample gas discharge interface 4. In this case, the dew point sensor and its sampling chamber 1 and the oxygen sensor and its sampling chamber 2 can be isolated from the atmosphere by the four-way valve 11 at the same time. After isolation, the atmosphere cannot directly contact the sensors, thereby reducing the response time when the two sensors convert from a high concentration water and oxygen signal to a low concentration signal. Figure 5The sample gas input interface 3 is connected with the pressure stabilizing valve 9 through the connecting pipeline 8, the pressure stabilizing valve 9 is connected with the dew point sensor and the sampling chamber 1, the dew point sensor and the sampling chamber 1 are connected with the flow meter 10 with the flow regulating function, then connected to the four-way valve 11, and the four-way valve 11 is connected to the sample gas discharge interface, in this case, the air pressure at the dew point sensor and the sampling chamber 1 is the output pressure of the pressure stabilizing valve, the pressure is stable and convenient for measurement.

[0030] The instrument shell 5 is made of metal material, and the circuit negative electrode of the circuit board 7 is connected with the instrument shell 5; the dew point sensor and the sampling chamber 1, the oxygen sensor and the sampling chamber 2, the connecting pipeline 8, the pressure stabilizing valve 9, the flow meter 10 with the flow regulating function and the four-way valve 11 are connected with the instrument shell 5, and the above components are electrically connected to form a common shielding layer, so that the electromagnetic interference of the external environment on the instrument is reduced, and the electromagnetic interference between the sensors is reduced.

[0031] The oxygen sensor and the sampling chamber 2 are composed of a sampling chamber shell 201, a sensor support 202 and an oxygen sensor 203, the sensor support 202 and the oxygen sensor 203 are covered in the sampling chamber shell 201, and the oxygen sensor 203 is supported by the sensor support 202, so that the oxygen sensor 203 is prevented from directly contacting the sampling chamber shell 201.

[0032] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A gas water content and oxygen content integrated analyzer, characterized in that: The application relates to a portable gas analyzer which can simultaneously analyze water content and oxygen content, and comprises a dew point sensor and a sampling chamber (1) thereof, an oxygen sensor and a sampling chamber (2) thereof, a sample gas input interface (3), a sample gas discharge interface (4), an instrument shell (5), a display screen (6), a circuit board (7), a connecting pipeline (8), a pressure stabilizing valve (9), a flow meter (10) with a flow regulating function, and a four-way valve (11); the measured sample gas is connected to the sample gas input interface (3) through a pipeline outside the instrument, then passes through the connecting pipeline (8) inside the instrument shell (5), is simultaneously distributed to the dew point sensor and the sampling chamber (1) thereof and the oxygen sensor and the sampling chamber (2) thereof for analysis, and is discharged through the sample gas discharge interface (4) after the analysis is completed; the display screen (6) and the circuit board (7) are electrically connected with the two sensors; the dew point sensor and the sampling chamber (1) thereof are connected with the oxygen sensor and the sampling chamber (2) thereof in series or in parallel inside the instrument shell (5) to form a gas path; the instrument shell (5) is a box body, and the dew point sensor and the sampling chamber (1) thereof, the oxygen sensor and the sampling chamber (2) thereof, the sample gas input interface (3), the sample gas discharge interface (4), the display screen (6), the circuit board (7), the connecting pipeline (8), the pressure stabilizing valve (9), the flow meter (10) with the flow regulating function, and the four-way valve (11) are fixed on the surface and in the interior of the box body to form a portable gas analyzer which can simultaneously analyze water content and oxygen content.

2. The gas and water content oxygen content integrative analyzer according to claim 1, characterized in that: The instrument shell (5) is fixed and protects the dew point sensor and the sampling chamber (1) thereof, the oxygen sensor and the sampling chamber (2) thereof, the sample gas input interface (3), the sample gas discharge interface (4), the display screen (6), the circuit board (7), the connecting pipeline (8), the pressure stabilizing valve (9), the flow meter (10) with the flow regulating function, and the four-way valve (11) through mechanical connection; the display screen (6) is installed on the surface of the instrument shell (5); the pressure stabilizing valve (9) is installed in front of the flow meter (10) with the flow regulating function; the flow meter (10) with the flow regulating function is installed in front of the four-way valve (11); and the four-way valve (11) is connected to the sample gas discharge interface (4).

3. The gas and water content oxygen content integrative analyzer according to claim 1, characterized in that: The four-way valve (11) is a two-position four-way valve which is connected in parallel with the oxygen sensor and the sampling chamber (2) in the gas path, and switches the oxygen sensor and the sampling chamber (2) between two states by rotating a valve core, namely, the oxygen sensor and the sampling chamber (2) are connected to the gas path to receive the measured sample gas or are isolated from the gas path to close the oxygen sensor.

4. The gas and water content oxygen content integrative analyzer according to claim 1, characterized in that: When the dew point sensor and the sampling chamber (1) thereof and the oxygen sensor and the sampling chamber (2) thereof are connected in series to form an internal gas path, the dew point sensor and the sampling chamber (1) thereof and the oxygen sensor and the sampling chamber (2) thereof are connected through the connecting pipeline (8) and form a front-stage and rear-stage relationship, the dew point sensor and the sampling chamber (1) thereof are in the front stage, and the oxygen sensor and the sampling chamber (2) thereof are in the rear stage, so that the measured sample gas first passes through the dew point sensor and then passes through the oxygen sensor after being analyzed by the dew point sensor.

5. The gas and water content oxygen content integrative analyzer according to claim 1, characterized in that: When the dew point sensor and its sampling chamber (1) and the oxygen sensor and its sampling chamber (2) are connected in parallel to form an internal gas circuit, one end of the dew point sensor and its sampling chamber (1) is connected to a sample gas discharge interface (4) of a rear-stage part of the oxygen sensor and its sampling chamber (2), and one end is connected to a front-stage part of the oxygen sensor and its sampling chamber (2); the measured sample gas is divided into two paths and passes through the dew point sensor and the oxygen sensor respectively.

6. The gas and water content oxygen content integrative analyzer according to claim 1, characterized in that: The instrument shell (5) is made of metal, the circuit negative electrode of the circuit board (7) is connected with the instrument shell (5); the dew point sensor and its sampling chamber (1), the oxygen sensor and its sampling chamber (2), the connecting pipeline (8), the pressure stabilizing valve (9), the flow meter (10) with flow regulating function, and the four-way valve (11) are connected with the instrument shell (5), and the above instrument shell is electrically connected to form a common ground shielding layer.

7. The gas and water content oxygen content integrative analyzer according to claim 1, characterized in that: The oxygen sensor and its sampling chamber (2) are composed of a sampling chamber shell (201), a sensor support (202) and an oxygen sensor (203); the sensor support (202) and the oxygen sensor (203) are covered inside the sampling chamber shell (201); the oxygen sensor (203) is supported by the sensor support (202); and the oxygen sensor (203) has no direct contact with the sampling chamber shell (201).

Images