Earthquake precursor negative pressure hot spring gas sampling device of miniature gas chromatograph

Abstract

The utility model belongs to the technical field of gas detection and sampling, and particularly relates to an earthquake precursor negative pressure hot spring gas sampling device of a miniature gas chromatograph, which comprises an outer shell, a water storage box mounted in the outer shell, a flow valve connected to the top end of the water storage box, an air inlet connected to the flow valve, an electronic barometer mounted on the air inlet, and a gas outlet connected to the air inlet. The top end of the water storage box is communicated with a one-way sample inlet, the bottom side of the water storage box is communicated with the bottom end of a water drainage pipe, the top end of the water drainage pipe is communicated with the bottom of a snakelike condensation pipe, the snakelike condensation pipe is inserted into a first heat exchange fin in a penetrating mode, a semiconductor chilling plate is installed on the first heat exchange fin, the hot end of the semiconductor chilling plate is tightly attached to a base plate of a second heat exchange fin, and a cooling fan is installed on the second heat exchange fin. An external inert gas pressure tank is utilized to realize stable and automatic sample loading of a sample, so that the working efficiency and the detection precision are improved; by combining the unique design of the snake-shaped condensation pipe and the semiconductor chilling plate, the moisture in the sample gas can be quickly and effectively removed, and the reliability of the detection result is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of gas detection and sampling, and particularly relates to a seismic precursor negative pressure hot spring gas sampling device for a micro gas chromatograph. Background Technique

[0002] In the field of geological science research, especially in seismic precursor monitoring, the compositional changes of hot spring gases are regarded as one of the important natural phenomena, which can reflect key information such as the stress state, material migration, and possible magmatic activities inside the earth's crust. Therefore, accurate and efficient analysis of hot spring gases is of great significance for earthquake prediction and research on geological tectonic activities. However, due to their special sources and environmental conditions, hot spring gases usually contain a high concentration of water vapor, which will have a significant impact on the analysis results during direct gas chromatographic analysis, possibly leading to contamination of the chromatographic column, a decrease in detection sensitivity, and an increase in signal interference.

[0003] In traditional hot spring gas analysis methods, the collection, processing, and analysis of sample gases often involve multiple complex steps. In the sample collection stage, it is usually necessary to manually extract the gas from the hot spring source and store it in a specific container, and air pollution and human errors are easily introduced during this process. In the sample processing stage, in order to remove moisture, methods such as freeze-drying, chemical absorption, or molecular sieve adsorption are often used. These methods not only take a long time but may also cause losses or contamination of other components in the gas. Finally, in the sample analysis stage, due to the imperfect pretreatment steps, the detection performance of the gas chromatograph may be limited, affecting the accuracy and reliability of the results.

[0004] In recent years, with the progress of technology and the development of instrument equipment, gas chromatography technology has been widely used in the field of gas component analysis due to its advantages of high sensitivity, high resolution, and rapid analysis. However, for special samples such as hot spring gases containing a large amount of moisture, traditional gas chromatograph sampling devices often cannot meet the requirements. Therefore, it is particularly important to develop a hot spring gas sampling device that can automatically load samples, efficiently remove water, and adapt to the use of micro gas chromatographs. Content of the Utility Model

[0005] Aiming at the above problems, the purpose of the present utility model is to provide a seismic precursor negative pressure hot spring gas sampling device for a micro gas chromatograph, which solves the problems in the prior art that gas sampling mostly relies on manual operation, not only has low efficiency but also easily introduces human errors; at the same time, for the treatment of moisture in the gas, complex pretreatment systems are mostly used, with high costs and complex operations.

[0006] To achieve the above objectives, the technical solution adopted by the present utility model is as follows: An earthquake precursor negative pressure hot spring gas sampling device for a micro gas chromatograph, comprising an outer casing, on one side of the outer casing is installed a touch screen, inside the outer casing is installed a water storage box, at the bottom end of the water storage box is threadedly connected a water discharge cover, at the top end of the water storage box is connected to one end port of a flow valve through a pipeline, the other port of the flow valve is connected to an air inlet, on the air inlet is installed an electronic pressure gauge, the air inlet is communicated with the air outlet of an argon pressure bottle, at the top end of the water storage box is communicated with a one-way sampling port, at the bottom side of the water storage box is communicated with the bottom end of a drain pipe, the top end of the drain pipe is communicated with the bottom of a serpentine condenser, the serpentine condenser is inserted in a heat exchange fin one, on the substrate of the heat exchange fin one is installed a semiconductor refrigeration chip, the hot end of the semiconductor refrigeration chip is tightly attached to the substrate of a heat exchange fin two for installation, on the other side of the heat exchange fin two is installed a cooling fan.

[0007] The beneficial effects of the present utility model are as follows: By using an external inert gas pressure tank, stable and automatic sample loading is achieved, improving work efficiency and detection accuracy; with the unique design of the combination of the serpentine condenser and the semiconductor refrigeration chip, rapid and effective removal of moisture in the sample gas is realized, enhancing the reliability of the detection results.

[0008] To prevent the sample gas from directly entering the drain pipe and affecting the condensation and dehumidification effect of the serpentine condenser;

[0009] As a further improvement of the above technical solution: The liquid level height of the liquid in the water storage box is not lower than the top of the bottom end port of the drain pipe.

[0010] The beneficial effect of this improvement is that the liquid level height in the water storage box is always higher than the bottom end of the drain pipe, thus achieving a liquid seal effect and preventing the sample gas from directly entering the drain pipe without condensation treatment and affecting the condensation and dehumidification effect of the serpentine condenser.

[0011] To ensure the stability of the operation of the semiconductor refrigeration chip;

[0012] As a further improvement of the above technical solution: The cold end of the semiconductor refrigeration chip is tightly pressed on the substrate of the heat exchange fin one, a through groove adapted to install the semiconductor refrigeration chip is opened on the outer casing, and the heat exchange fin two and the cooling fan are both arranged on the outside of the outer casing.

[0013] The beneficial effect of this improvement is that when the cooling fan operates, it effectively accelerates the air flow speed on the surface of the heat exchange fin two, and then quickly takes away the heat at the hot end of the semiconductor refrigeration chip, ensuring the stability of the operation of the semiconductor refrigeration chip.

[0014] To further improve the performance of the semiconductor refrigeration chip;

[0015] As a further improvement of the above technical solution: Thermal conductive silicone grease is coated on both the cold end and the hot end of the semiconductor refrigeration sheet.

[0016] The beneficial effect of this improvement is that the setting of the thermal conductive silicone grease can improve the thermal conductivity between the semiconductor refrigeration sheet and the second heat exchange fin and the first heat exchange fin.

[0017] In order to flexibly adjust the water removal efficiency;

[0018] As a further improvement of the above technical solution: A temperature sensor is installed on the fins of the first heat exchange fin, and the semiconductor refrigeration sheet, the cooling fan and the temperature sensor are electrically connected to a temperature controller, and the touch screen is electrically connected to the temperature controller.

[0019] The beneficial effect of this improvement is that through the temperature feedback of the temperature sensor and the automatic adjustment of the refrigeration temperature of the semiconductor refrigeration sheet, the water removal efficiency can be flexibly adjusted.

[0020] In order to ensure the stability of the sample injection pressure;

[0021] As a further improvement of the above technical solution: The contact of the electronic pressure gauge is installed inside the air inlet, and the electronic pressure gauge and the flow valve are electrically connected to a single-chip microcomputer, and the touch screen is electrically connected to the single-chip microcomputer.

[0022] The beneficial effect of this improvement is that through the air pressure feedback of the electronic pressure gauge and the automatic adjustment of the flow rate of the flow valve, the stable control of the sample injection pressure can be realized.

[0023] In order to quickly and accurately discharge the water collected in the water storage box;

[0024] As a further improvement of the above technical solution: The water discharge cover is arranged on the outer side of the outer shell, the water storage box is a colorless and transparent box structure, and a glass window is arranged on the outer shell at the bottom side of the water storage box.

[0025] The beneficial effect of this improvement is that the operator can unscrew the water discharge cover to discharge the water collected in the water storage box, and observe the remaining water level in the water storage box through the glass window.

[0026] The parts not involved in this device are the same as the prior art or can be implemented by using the prior art. Description of the Drawings

[0027] Figure 1 It is a sectional structure of the present utility model Figure 1 ;

[0028] Figure 2 It is a schematic structure of the present utility model Figure 2 ;

[0029] Figure 3Schematic structural diagram of the present utility model excluding the outer casing;

[0030] In the figure: 1. Outer casing; 2. Touch screen; 3. Water storage box; 4. Drainage cover; 5. Flow valve; 6. Air inlet; 7. Electronic pressure gauge; 8. Drain pipe; 9. Serpentine condenser; 10. Unidirectional sampling port; 11. Heat exchange fin one; 12. Semiconductor refrigeration sheet; 13. Heat exchange fin two; 14. Cooling fan; 15. Glass window. Specific implementation mode

[0031] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be described in detail below with reference to the accompanying drawings. The description in this part is only exemplary and explanatory, and should not have any restrictive effect on the protection scope of the present invention.

[0032] Embodiment 1:

[0033] As Figure 1As shown in Fig. —3: A seismic precursor negative pressure hot spring gas sampling device for a micro gas chromatograph, including an outer casing 1, a touch screen 2 is installed on one side of the outer casing 1, a water storage box 3 is installed inside the outer casing 1, a water discharge cover 4 is threadedly connected to the bottom end of the water storage box 3, one end port of a flow valve 5 is connected to the top end of the water storage box 3 through a pipeline, the other port of the flow valve 5 is connected to an air inlet 6, an electronic pressure gauge 7 is installed on the air inlet 6, the air inlet 6 communicates with the outlet of an argon pressure bottle, the top end of the water storage box 3 communicates with a one-way sampling port 10, the bottom side of the water storage box 3 communicates with the bottom end of a drain pipe 8, the top end of the drain pipe 8 communicates with the bottom of a serpentine condenser 9, the serpentine condenser 9 is inserted into a heat exchange fin 11, a semiconductor refrigeration chip 12 is installed on the substrate of the heat exchange fin 11, the hot end of the semiconductor refrigeration chip 12 is tightly attached to the substrate of a heat exchange fin 13 for installation, a cooling fan 14 is installed on the other side of the heat exchange fin 13. The use of an external inert gas pressure tank realizes stable and automatic sampling of samples, improving work efficiency and detection accuracy;Combined with the unique design of the serpentine condenser 9 and the thermoelectric cooler 12, rapid and effective removal of moisture in the sample gas is achieved, improving the reliability of the detection results. The liquid level height of the liquid in the water storage box 3 is not lower than the top of the bottom port of the drain pipe 8. The liquid level height in the water storage box 3 is always higher than the bottom of the drain pipe 8, thus achieving a liquid seal effect and preventing the sample gas from directly entering the drain pipe 8 without condensation treatment, which may affect the condensation and dehumidification effect of the serpentine condenser 9. The cold end of the thermoelectric cooler 12 is tightly pressed on the substrate of the heat exchange fin 11. A through groove for fitting and installing the thermoelectric cooler 12 is provided on the outer casing 1. The heat exchange fin 2 13 and the cooling fan 14 are both arranged on the outside of the outer casing 1. When the cooling fan 14 works, it effectively accelerates the air flow speed on the surface of the heat exchange fin 2 13, and then quickly takes away the heat at the hot end of the thermoelectric cooler 12, ensuring the stability of the operation of the thermoelectric cooler 12. Thermal conductive silicone grease is coated on both the cold end and the hot end of the thermoelectric cooler 12. The setting of the thermal conductive silicone grease can improve the thermal conductivity between the thermoelectric cooler 12 and the heat exchange fin 2 13 and the heat exchange fin 11. A temperature sensor is installed on the fins of the heat exchange fin 11. The thermoelectric cooler 12, the cooling fan 14, and the temperature sensor are electrically connected to a temperature controller. The touch screen 2 is electrically connected to the temperature controller. Through the temperature feedback of the temperature sensor and the automatic adjustment of the cooling temperature of the thermoelectric cooler 12, flexible adjustment of the water removal efficiency can be achieved. The contact of the electronic pressure gauge 7 is installed inside the air inlet 6. The electronic pressure gauge 7 and the flow valve 5 are electrically connected to a single-chip microcomputer. The touch screen 2 is electrically connected to the single-chip microcomputer. Through the pressure feedback of the electronic pressure gauge 7 and the automatic adjustment of the flow rate of the flow valve 5, stable control of the injection pressure can be achieved. The drain cover 4 is arranged on the outside of the outer casing 1. The water storage box 3 is a colorless transparent box structure. A glass window 15 is provided on the outer casing 1 at the bottom side of the water storage box 3. The operator can unscrew the drain cover 4 to drain the water collected in the water storage box 3 and observe the remaining water level in the water storage box 3 through the glass window 15.;

[0034] The working principle of this technical solution is as follows: The thermoelectric cooler 12 and the cooling fan 14 are powered on and operate. The gas sample is injected into the inside of the water storage box 3 through the one-way injection port 10 using a syringe. Argon enters the inside of the water storage box 3 through the hose connected to the air inlet 6. Under the detection feedback of the electronic pressure gauge 7 and the control and adjustment of the flow valve 5, it enters the inside of the water storage box 3 at a constant micro-pressure such as 10 Psi, thereby pushing the gas in the water storage box 3 into the serpentine condenser 9. The temperature of the gas decreases during the process of passing through the serpentine condenser 9, and then the moisture in the sample is pre-cooled and liquefied. Under the action of gravity, it flows into the inside of the water storage box 3 through the drain pipe 8. The water level in the water storage box 3 should always cover the bottom port of the drain pipe 8 to achieve a liquid seal effect. The dry sample gas can then enter the gas chromatograph.

[0035] It should be noted that in this text, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements not only includes those elements but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device.

[0036] In this text, specific examples are used to illustrate the principles and implementation manners of the present invention. The description of the above examples is only for helping to understand the method and its core idea of the present invention. The above is only the preferred implementation manner of the present invention. It should be noted that due to the limitation of literal expression, objectively there are infinite specific structures. For those of ordinary skill in the art, without departing from the principle of the present invention, several improvements, refinements or changes can be made, and the above technical features can also be combined in an appropriate manner; these improvements, refinements, changes or combinations, or directly applying the concept and technical solution of the invention to other occasions without improvement, shall all be regarded as the protection scope of the present invention.

Claims

1. A seismic precursor negative pressure hot spring gas sampling device for a micro gas chromatograph, characterized in that: It includes a housing (1). A touch screen (2) is installed on one side of the housing (1). A water storage box (3) is installed inside the housing (1). A drain cover (4) is threadedly connected to the bottom end of the water storage box (3). One end port of a flow valve (5) is connected to the top end of the water storage box (3) through a pipeline. The other port of the flow valve (5) is connected to an air inlet (6). An electronic pressure gauge (7) is installed on the air inlet (6). The air inlet (6) communicates with the outlet of an argon pressure cylinder. A one-way sampling port (10) is communicated with the top end of the water storage box (3). The bottom side of the water storage box (3) communicates with the bottom end of a drain pipe (8). The top end of the drain pipe (8) communicates with the bottom of a serpentine condenser (9). The serpentine condenser (9) is inserted into a heat exchange fin one (11). A semiconductor refrigeration sheet (12) is installed on the substrate of the heat exchange fin one (11). The hot end of the semiconductor refrigeration sheet (12) is tightly attached to the substrate of a heat exchange fin two (13). A cooling fan (14) is installed on the other side of the heat exchange fin two (13).

2. The earthquake precursor negative pressure hot spring gas sampling device for a micro gas chromatograph according to claim 1, characterized in that: The liquid level height of the liquid in the water storage box (3) is not lower than the top end of the bottom end port of the drain pipe (8).

3. The earthquake precursor negative pressure hot spring gas sampling device for a micro gas chromatograph according to claim 1, characterized in that: The cold end of the semiconductor refrigeration sheet (12) is pressed tightly on the substrate of the heat exchange fin one (11). A through groove for fitting and installing the semiconductor refrigeration sheet (12) is opened on the housing (1). The heat exchange fin two (13) and the cooling fan (14) are both arranged outside the housing (1).

4. The earthquake precursor negative pressure hot spring gas sampling device for a micro gas chromatograph according to claim 1, characterized in that: Thermal conductive silicone grease is coated on both the cold end and the hot end of the semiconductor refrigeration sheet (12).

5. The earthquake precursor negative pressure hot spring gas sampling device of a micro gas chromatograph according to claim 1, characterized in that: A temperature sensor is installed on the fins of the heat exchange fin one (11). The semiconductor refrigeration sheet (12), the cooling fan (14) and the temperature sensor are electrically connected to a temperature controller. The touch screen (2) is electrically connected to the temperature controller.

6. The negative pressure hot spring gas sampling device for earthquake precursors of a micro gas chromatograph according to claim 1, characterized in that: The contact of the electronic pressure gauge (7) is installed inside the air inlet (6). The electronic pressure gauge (7) and the flow valve (5) are electrically connected to a single-chip microcomputer. The touch screen (2) is electrically connected to the single-chip microcomputer.

7. The earthquake precursor negative pressure hot spring gas sampling device for a micro gas chromatograph according to claim 1, characterized in that: The drain cover (4) is arranged outside the housing (1). The water storage box (3) is a colorless and transparent box structure. A glass window (15) is arranged on the housing (1) at the bottom side of the water storage box (3).

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