Gas detector for detecting various gases

Abstract

The utility model discloses a gas detector for detecting various gases, which relates to the technical field of gas detection and comprises a detection host and a detection mechanism. The detection mechanism comprises a sample inlet, a valve box, a sample inlet valve, a valve pipe, an auxiliary assembly, a chromatographic column, detection equipment and a temperature control assembly, the sample inlet, the sample inlet valve, a control valve and the valve pipe are used for shunting a sample, and a gas guide part, an auxiliary gas circuit and a mass flow controller are matched to provide necessary carrier gas and auxiliary gas for the sample; samples are classified, analyzed and detected through the chromatographic columns and the detection equipment, the detection efficiency of the analyzed samples is improved, the sample detection frequency is guaranteed, the interior of the laboratory is clean, the air inlet header pipe, the air inlet branch pipes, the temperature sensors, the air outlet branch pipes, the air outlet header pipe and the air pipe valves are matched to control the temperature of the chromatographic columns in the temperature control box, and the detection efficiency is improved. The temperature uniformity and stability of the whole chromatographic column are ensured, and the separation effect and the detection precision of the detection mechanism are improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to gas detection technical field, specifically a kind of gas detector for detecting multiple gas. BACKGROUND

[0002] Gas chromatography is a chromatographic separation and analysis method using gas as mobile phase. The vaporized sample is carried into the chromatographic column by the carrier gas. The fixed phase in the column and the molecules in the sample have different interaction forces, and each component flows out of the chromatographic column at different times. The components are separated from each other and enter the detector in turn to obtain the detection signal of each component. The gas detector is used to detect one or more target gases in the environment or from a gas source. The gas detector can be used to test the gas source in the industrial environment.

[0003] The existing gas detector has certain disadvantages in use. Due to the instability and corrosiveness of the sample in the air, as well as the reasons of the chromatograph itself, various problems may occur during the sample analysis process. The sample absorbs moisture and hydrolyzes when it comes into contact with air, producing white silica hydrolysis product and strong corrosive HCl mist, which can easily corrode the instrument and harm the user's body. Silica can also easily cause blockage of the chromatographic system. Using hydrogen as carrier gas also brings a series of problems to the operation safety and instrument stability, which cannot meet the needs of people. SUMMARY

[0004] The utility model aims at at least one of the technical problems existing in prior art;Therefore, the utility model provides a kind of gas detector for detecting multiple gas.

[0005] A kind of gas detector for detecting multiple gas, including: detection host computer and the detection mechanism being arranged on detection host computer;Wherein, the side of the detection host computer is provided with sample inlet;The detection mechanism includes the valve box being connected with sample inlet, the sample valve being arranged in valve box, several groups of valve pipe being communicated with sample valve and auxiliary assembly being communicated with valve pipe, the valve box and sample valve control the flow direction of sample, realize accurate shunt and sample, the auxiliary assembly can provide necessary carrier gas and auxiliary gas to sample, guarantee the stable operation of detection mechanism;The detection mechanism further includes chromatographic column being communicated with valve pipe, detection equipment being connected with chromatographic column and temperature control component for temperature regulation of chromatographic column, and several groups of detection equipment are used for detecting different target components respectively, ensure high sensitivity and accuracy.

[0006] As a further scheme of the utility model: the auxiliary assembly includes the air guide piece communicated with the valve pipe bottom end, the auxiliary gas path detachably installed on the air guide piece and the mass flow controller installed on the auxiliary gas path, the auxiliary gas path can be connected with the gas supply equipment, necessary carrier gas and auxiliary gas are provided for the sample, the mass flow controller can accurately control the gas flow, thereby monitoring and adjusting the carrier gas flow rate, the bottom end of the air guide piece is provided with the air guide pipe connected with the chromatographic column.

[0007] As a further scheme of the utility model: the control valve is arranged on the sample injection valve and connected with the valve pipe top end, one end of the sample injection valve is provided with the guide pipe communicated with the sample injection port, the control valve and the guide pipe can cooperate to shunt the sample.

[0008] As a further scheme of the utility model: the inside of the detection equipment is provided with the acquisition card for collecting data, the front end surface of the detection host is provided with the display connected with the detection equipment, the detection equipment can process and analyze the data collected by the acquisition card and provide intuitive result display through the display.

[0009] As a further scheme of the utility model: the inside bottom surface of the detection host is provided with the support seat matched with the detection equipment, the chromatographic column is arranged on the upper end of the support seat, and the support seat is made of heat insulation material.

[0010] As a further scheme of the utility model: the temperature control assembly includes the temperature control box arranged outside the chromatographic column, the temperature sensor detachably installed on the temperature control box, the gas inlet branch pipes and the gas outlet branch pipes communicated with the temperature control box, the gas pipe valves connected with the detection host are arranged on the gas inlet branch pipes and the gas outlet branch pipes, the gas inlet branch pipes can provide heating gas inside the temperature control box, so that the chromatographic column is in stable temperature, and the accuracy of the experiment is improved, the temperature sensor is a thermocouple temperature sensor, and the gas outlet branch pipes can discharge the gas inside the temperature control box.

[0011] As a further scheme of the utility model: the temperature control assembly further includes the gas inlet main pipe arranged in the detection host and communicated with the gas inlet branch pipes and the gas outlet main pipe arranged below the gas inlet main pipe, the gas outlet branch pipes are all communicated with the gas outlet main pipe perpendicularly, one end of the gas inlet main pipe and one end of the gas outlet main pipe all extend out of the rear end surface of the detection host, one end of the gas inlet main pipe extends out of the detection host and is connected with the heating gas source, and one end of the gas outlet main pipe extends out of the detection host and is connected with the gas treatment equipment.

[0012] As a further scheme of the utility model: the temperature control box is detachably installed on the upper end surface of the support seat, the temperature control box is in a cylindrical structure, and the temperature control box is made of heat preservation material.

[0013] Compared with the prior art, the utility model has the advantages of

[0014] (1) the utility model discloses a detection host computer and detection mechanism, sample inlet, sample valve, control valve and valve pipe are shunted to sample, and the necessary carrier gas and auxiliary gas are provided to sample by cooperation of air guide piece, auxiliary gas circuit and mass flow controller, and the sample is classified and analyzed and detected by chromatographic column and detection equipment, which improves the detection efficiency of the sample analysis, guarantees the sample detection frequency, and the cleanliness of the laboratory, and cooperation of air inlet main pipe, air inlet branch pipe, temperature sensor, air outlet branch pipe, air outlet main pipe and gas pipe valve controls the temperature of the chromatographic column in the temperature control box, ensures the temperature uniformity and stability of the whole chromatographic column, and improves the separation effect and detection precision of the detection mechanism. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is the whole schematic view of the utility model;

[0016] Figure 2 It is the local structure view of detection host computer and detection mechanism in the utility model;

[0017] Figure 3 It is the local structure view of temperature control assembly in the utility model;

[0018] Figure 4 It is the local structure view of auxiliary assembly in the utility model.

[0019] In the drawing: 1, detection host computer;2, sample inlet;3, valve box;4, sample valve;5, valve pipe;6, chromatographic column;7, detection equipment;8, air guide piece;9, auxiliary gas circuit;10, mass flow controller;11, air guide pipe;12, control valve;13, guide pipe;14, display;15, support seat;16, temperature control box;17, temperature sensor;18, air inlet branch pipe;19, air outlet branch pipe;20, gas pipe valve;21, air inlet main pipe;22, air outlet main pipe. DETAILED DESCRIPTION

[0020] The technical scheme of the utility model will be described below in conjunction with the embodiments, and obviously, the described embodiments are only a part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor belong to the protection scope of the utility model.

[0021] Embodiment one

[0022] Please refer to Figure 1 - Figure 4The application provides a gas detector for detecting multiple gases, which comprises a detection host 1 and a detection mechanism arranged on the detection host 1; one side of the detection host 1 is provided with a sample inlet 2; the detection mechanism comprises a valve box 3 connected with the sample inlet 2, a sample inlet valve 4 arranged in the valve box 3, a plurality of valve pipes 5 in communication with the sample inlet valve 4 and an auxiliary assembly in communication with the valve pipes 5, the valve box 3 and the sample inlet valve 4 control the flow direction of the sample, accurate flow splitting and sampling are realized, the auxiliary assembly can provide necessary carrier gas and auxiliary gas for the sample, and stable operation of the detection mechanism is ensured; the detection mechanism further comprises a chromatographic column 6 in communication with the valve pipes 5, a detection device 7 connected with the chromatographic column 6 and a temperature control assembly for temperature adjustment of the chromatographic column 6, and the plurality of detection devices 7 are respectively used for detecting different target components, so that high sensitivity and accuracy are ensured.

[0023] The auxiliary assembly in the embodiment comprises a gas guide 8 in communication with the bottom end of the valve pipe 5, an auxiliary gas path 9 detachably mounted on the gas guide 8 and a mass flow controller 10 mounted on the auxiliary gas path 9, the auxiliary gas path 9 can be externally connected to a gas supply device, necessary carrier gas and auxiliary gas are provided for the sample, the mass flow controller 10 can accurately control the gas flow, so that the carrier gas flow rate is monitored and adjusted, and the bottom end of the gas guide 8 is provided with a gas guide pipe 11 connected with the chromatographic column 6.

[0024] The control valve 12 connected with the top end of the valve pipe 5 is arranged on the sample inlet valve 4 in the embodiment, one end of the sample inlet valve 4 is provided with a guide pipe 13 in communication with the sample inlet 2, and the control valve 12 and the guide pipe 13 cooperate to split the sample.

[0025] The inside of the detection device 7 is provided with a collection card for collecting data in the embodiment, the front end surface of the detection host 1 is provided with a display 14 connected with the detection device 7, the display 14 can realize data visualization and control the detection mechanism through an operation interface, the detection device 7 can process and analyze the data collected by the collection card and provide intuitive result display through the display 14.

[0026] The inside bottom surface of the detection host 1 is provided with a supporting seat 15 matched with the detection device 7 in the embodiment, the chromatographic column 6 is arranged on the upper end of the supporting seat 15, and the supporting seat 15 is made of heat insulation material.

[0027] In summary, the detection host 1 is placed in an experimental area, an experimental needle is used to inject a quantitative sample into the sample inlet 2, the sample inlet valve 4 guides the sample into the valve pipes 5 through the control valve 12, and then the sample is guided into the gas guide 8 through the valve pipes 5, the auxiliary gas path 9 guides the carrier gas and the auxiliary gas into the gas guide 8, so that the sample enters the chromatographic column 6 through the gas guide pipe 11, and a plurality of chromatographic columns 6 cooperate with a plurality of detection devices 7 to respectively analyze hydrogen chloride, dichlorodihydrogen silicon, trichlorohydrogen silicon, silicon tetrachloride, nitrogen and oxygen.

[0028] Embodiment Two

[0029] With reference to Figure 2 and Figure 3 In the second embodiment of the utility model, the temperature control assembly in the embodiment comprises a temperature control box 16 arranged outside the chromatographic column 6, a temperature sensor 17 detachably mounted on the temperature control box 16, a plurality of groups of air inlet branch pipes 18 and air outlet branch pipes 19 in communication with the temperature control box 16, and air pipe valves 20 connected with the detection host 1 and arranged on the air inlet branch pipes 18 and the air outlet branch pipes 19, the air inlet branch pipes 18 can provide heating gas inside the temperature control box 16, so that the chromatographic column 6 is in a stable temperature, and the accuracy of the experiment is improved, the temperature sensor 17 is arranged as a thermocouple temperature sensor, and the air outlet branch pipes 19 can discharge the gas inside the temperature control box 16.

[0030] The temperature control assembly in the embodiment further comprises an air inlet main pipe 21 arranged inside the detection host 1 and in communication with the plurality of groups of air inlet branch pipes 18 and an air outlet main pipe 22 arranged below the air inlet main pipe 21, the plurality of groups of air outlet branch pipes 19 are all in perpendicular communication with the air outlet main pipe 22, one end of the air inlet main pipe 21 and one end of the air outlet main pipe 22 both extend out of the rear end surface of the detection host 1, one end of the air inlet main pipe 21 extends out of the detection host 1 and is externally connected with a heating gas source, and one end of the air outlet main pipe 22 extends out of the detection host 1 and is externally connected with a gas treatment device.

[0031] The temperature control box 16 in the embodiment is detachably mounted on the upper end surface of the support seat 15, the temperature control box 16 is in a cylindrical structure, and the temperature control box 16 is arranged as a heat preservation material.

[0032] In summary, the heating gas source enters the plurality of groups of air inlet branch pipes 18 through the air inlet main pipe 21, the air pipe valves 20 are opened, so that the heating gas in the air inlet branch pipes 18 enters the temperature control box 16, and the temperature of the chromatographic column 6 is controlled, when the temperature sensor 17 shows that the temperature inside the temperature control box 16 is too high, the air pipe valves 20 on the air outlet branch pipes 19 are opened, and part of the high-temperature air inside the temperature control box 16 is discharged through the air outlet branch pipes 19 and the air outlet main pipe 22, so that the temperature of the chromatographic column 6 is controlled.

[0033] Embodiment Three

[0034] With reference to Figure 1 - Figure 4 This embodiment is obtained by combining Embodiment One and Embodiment Two.

[0035] The air inlet manifold 21, the air inlet branch pipe 18, the temperature sensor 17, the air outlet branch pipe 19, the air outlet manifold 22 and the air pipe valve 20 cooperate to control the temperature of the chromatographic column 6 in the temperature control box 16, the sample inlet 2, the sample valve 4, the control valve 12 and the valve pipe 5 cooperate to split the sample, the air guide 8, the auxiliary gas path 9 and the mass flow controller 10 cooperate to provide necessary carrier gas and auxiliary gas for the sample, and the chromatographic column 6 and the detection device 7 analyze and detect the sample.

[0036] The above examples are only used to illustrate the technical method of the utility model and are not limited. Although the utility model is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical method of the utility model can be modified or replaced equivalently.

Claims

1. A gas detector for detecting a plurality of gases, characterized by, The utility model relates to a detection host (1) and detection mechanism set on the detection host (1) are included. One side of the detection host (1) is provided with a sample inlet (2). The detection mechanism includes a valve box (3) connected with the sample inlet (2), a sample valve (4) arranged in the valve box (3), a plurality of valve pipes (5) in communication with the sample valve (4) and an auxiliary assembly in communication with the valve pipe (5). The detection mechanism further includes a chromatographic column (6) in communication with the valve pipe (5), a detection device (7) connected with the chromatographic column (6) and a temperature control assembly for temperature regulation of the chromatographic column (6). The auxiliary assembly includes a gas guide (8) in communication with the bottom end of the valve pipe (5), an auxiliary gas path (9) detachably mounted on the gas guide (8) and a mass flow controller (10) mounted on the auxiliary gas path (9), and the bottom end of the gas guide (8) is provided with a gas guide pipe (11) connected with the chromatographic column (6).

2. The gas detector for detecting a plurality of gases according to claim 1, wherein A control valve (12) is arranged on the sample valve (4) and connected with the top end of the valve pipe (5), and one end of the sample valve (4) is provided with a guide pipe (13) in communication with the sample inlet (2).

3. The gas detector for detecting a plurality of gases according to claim 2, wherein The detection device (7) is provided with a collection card inside for data collection, and the front end face of the detection host (1) is provided with a display (14) connected with the detection device (7).

4. The gas detector for detecting a plurality of gases according to claim 3, wherein The inner bottom face of the detection host (1) is provided with a support seat (15) matched with the detection device (7), and the chromatographic column (6) is arranged on the upper end of the support seat (15).

5. The gas detector for detecting a plurality of gases according to claim 1, wherein The temperature control assembly includes a temperature control box (16) arranged outside the chromatographic column (6), a temperature sensor (17) detachably mounted on the temperature control box (16), a plurality of gas inlet branch pipes (18) and gas outlet branch pipes (19) in communication with the temperature control box (16), and the gas inlet branch pipes (18) and the gas outlet branch pipes (19) are both provided with gas pipe valves (20) connected with the detection host (1).

6. The gas detector for detecting a plurality of gases according to claim 5, wherein The temperature control assembly further includes a gas inlet main pipe (21) arranged inside the detection host (1) and in communication with the plurality of gas inlet branch pipes (18), and a gas outlet main pipe (22) arranged below the gas inlet main pipe (21), and the plurality of gas outlet branch pipes (19) are all in communication with the gas outlet main pipe (22) perpendicularly, and one end of the gas inlet main pipe (21) and one end of the gas outlet main pipe (22) both extend out of the rear end face of the detection host (1).

7. The gas detector for detecting a plurality of gases according to claim 6, wherein The temperature control box (16) is detachably mounted on the upper end face of the support seat (15), the temperature control box (16) is in a cylindrical structure, and the temperature control box (16) is arranged to be heat-insulating.

8. The gas detector for detecting a plurality of gases according to claim 6, wherein ​

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