Combustible and explosive organic gas analyzer

Abstract

This invention provides a flammable and explosive organic gas analyzer, relating to the field of gas monitoring technology. It includes a detection unit comprising a detection chamber, a first input pipe, a second input pipe, and an output pipe, all connected to the detection chamber; a sampling unit comprising a compressed air inlet, a sample gas inlet, a jet pump, a main pipeline, and a first pipe; a gas path unit comprising an air inlet, a hydrogen inlet, a second pipe, and a third pipe, one end of the second pipe connected to the hydrogen inlet, and one end of the third pipe connected to the air inlet; and an analysis and control unit connected to the detection chamber. This invention employs a jet pump sampling method, which reduces equipment costs. Furthermore, the jet pump is a mechanical sampling method, requiring no power supply and reducing power consumption. The response time using the jet pump is less than 3 seconds, resulting in fast response and high gas detection efficiency.

Description

Technical Field

[0001] This utility model relates to the field of gas monitoring technology, and more specifically, to a combustible and explosive organic gas analyzer. Background Technology

[0002] Currently, the main methods for monitoring flammable and explosive gases include the following two:

[0003] 1. Equipment based on the FTA principle. This type of equipment is currently mainly imported, which is relatively expensive. In addition, this type of FTA detector relies on the heat generated by combustible gas and needs to work continuously without interruption. The heat generated by the continuously burning combustible gas accumulates inside the detector, and the detector will continuously increase the reference temperature over time, which will cause errors in the detection results and lead to false alarms.

[0004] 2. Detection equipment based on infrared and PID principles: Infrared does not respond to all compounds, and PID does not respond to some organic compounds. This can lead to incomplete detection of organic compounds and an inability to fully reflect the overall situation of flammable and explosive gases, which can easily result in false alarms.

[0005] Therefore, there is an urgent need for a convenient, efficient, real-time, and rapid gas monitoring device. Summary of the Invention

[0006] The purpose of this invention is to provide a flammable and explosive organic gas analyzer to improve the aforementioned problems. To achieve this purpose, the technical solution adopted by this invention is as follows:

[0007] This application provides a flammable and explosive organic gas analyzer, comprising:

[0008] The detection unit includes a detection chamber, a first input pipe, a second input pipe, and an output pipe, wherein the first input pipe, the second input pipe, and the output pipe are all connected to the detection chamber.

[0009] The sampling unit includes a compressed air inlet, a sample gas inlet, a jet pump, a main pipeline, and a first pipeline. One end of the main pipeline is connected to the sample gas inlet, and the other end of the main pipeline is connected to the first input pipeline. The compressed air inlet is connected to the power end of the jet pump through the first pipeline, and the suction end of the jet pump is connected to the end of the output pipeline away from the detection chamber.

[0010] A gas path unit, comprising an air inlet, a hydrogen inlet, a second pipe, and a third pipe, wherein one end of the second pipe is connected to the hydrogen inlet, the other end of the second pipe is connected to the first input pipe, one end of the third pipe is connected to the air inlet, and the other end of the third pipe is connected to the second input pipe;

[0011] An analysis and control unit is connected to the detection chamber, and the analysis and control unit generates gas analysis results based on the output electrical signal of the detection chamber.

[0012] Optionally, the sampling unit further includes a first three-way valve and a first bypass branch pipe.

[0013] A first bypass branch pipe is provided on the main pipeline, and a first three-way valve is provided on the first pipeline. The first bypass branch pipe is connected to the first three-way valve.

[0014] Optionally, the sampling unit further includes a standard gas zero inlet, a second three-way valve, and a second bypass branch pipe.

[0015] A second three-way valve is installed on the main pipeline between the first bypass branch pipe and the first input pipeline. One end of the second bypass branch pipe is connected to the second three-way valve, and the other end of the second bypass branch pipe is connected to the standard gas zero gas inlet.

[0016] Optionally, the sampling unit further includes a needle valve and a third bypass branch pipe.

[0017] A third bypass branch pipe is provided on the main pipeline between the second three-way valve and the first input pipeline. The needle valve is provided on the third bypass branch pipe, and the third bypass branch pipe is connected to the output pipeline.

[0018] Optionally, the sampling unit further includes a high-temperature filter, which is disposed on the main pipeline between the second three-way valve and the third bypass branch.

[0019] Optionally, the gas circuit unit further includes a first pressure regulating valve and a second pressure regulating valve, with the first pressure regulating valve installed on the second pipeline and the second pressure regulating valve installed on the third pipeline.

[0020] Optionally, the detection unit includes a flame arrester, a base, and an explosion-proof housing. The first input pipe and the second input pipe pass through the base and the explosion-proof housing in sequence and are connected to the detection chamber. The flame arrester is disposed in the output pipe.

[0021] Optionally, the analysis and control unit is connected to the electrical control terminals of the detection chamber, the first three-way valve, the second three-way valve, the first pressure regulating valve, and the second pressure regulating valve, respectively.

[0022] Optionally, the sampling unit further includes an exhaust gas outlet, and the output end of the jet pump is connected to the exhaust gas outlet.

[0023] Optionally, the detection chamber is equipped with an F ID detector.

[0024] The beneficial effects of this utility model are as follows:

[0025] This invention uses a jet pump sampling method, which can reduce equipment costs. Moreover, the jet pump is a mechanical sampling method that does not require power supply, thus reducing equipment power consumption. The response time of the jet pump is less than 3 seconds, which is fast and has high gas detection efficiency.

[0026] Other features and advantages of this invention will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing embodiments of the invention. The objects and other advantages of this invention can be realized and obtained by means of the structures particularly pointed out in the written description, claims, and drawings. Attached Figure Description

[0027] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the structure of the flammable and explosive organic gas analyzer described in the embodiments of this utility model;

[0029] Figure 2 This is a schematic diagram of the detection unit structure described in the embodiments of this utility model;

[0030] Figure 3 This is a schematic diagram of the structure between the detection unit, sampling unit, gas path unit and analysis control unit described in the embodiments of this utility model.

[0031] Marked in the image:

[0032] 01. First input pipe; 02. Second input pipe; 03. Output pipe; 101. Detection chamber; 102. Flame arrestor; 103. Base; 104. Explosion-proof enclosure; 201. Sample gas inlet; 202. Compressed air inlet; 203. Standard gas / zero gas inlet; 204. First three-way valve; 205. Second three-way valve; 206. High-temperature filter; 207. Needle valve; 208. Jet pump; 209. Exhaust gas outlet; 301. Hydrogen inlet; 302. Air inlet; 303. First pressure regulating valve; 304. Second pressure regulating valve; 10. Main pipeline; 20. First pipe; 30. Second pipe; 40. Third pipe; 50. First bypass branch pipe; 60. Second bypass branch pipe; 70. Third bypass branch pipe. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. The components of the embodiments of this utility model described and shown in the accompanying drawings can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this utility model provided in the accompanying drawings is not intended to limit the scope of the claimed utility model, but merely to illustrate selected embodiments of the utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0034] It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. Furthermore, in the description of this utility model, terms such as "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0035] Example:

[0036] See Figure 1 This embodiment provides a flammable and explosive organic gas analyzer, including:

[0037] The detection unit includes a detection chamber 101, a first input pipe 01, a second input pipe 02, and an output pipe 03, all of which are connected to the detection chamber 101.

[0038] The sampling unit includes a compressed air inlet 202, a sample gas inlet 201, a jet pump 208, a main pipeline 10, and a first pipeline 20. One end of the main pipeline 10 is connected to the sample gas inlet 201, and the other end of the main pipeline 10 is connected to the first input pipeline 01. The compressed air inlet 202 is connected to the power end of the jet pump 208 through the first pipeline 20, and the suction end of the jet pump 208 is connected to the end of the output pipeline 03 away from the detection chamber 101.

[0039] The gas path unit includes an air inlet 302, a hydrogen inlet 301, a second pipe 30, and a third pipe 40. One end of the second pipe 30 is connected to the hydrogen inlet 301, and the other end of the second pipe 30 is connected to the first input pipe 01. One end of the third pipe 40 is connected to the air inlet 302, and the other end of the third pipe 40 is connected to the second input pipe 02.

[0040] An analysis and control unit is connected to the detection chamber 101. The analysis and control unit generates gas analysis results based on the output electrical signal of the detection chamber 101.

[0041] Specifically, the sample gas in the sampling unit is mixed with hydrogen in the gas path unit and input into the detection chamber 101. Then, air in the gas path unit is used as a combustion aid and simultaneously input into the detection chamber 101 for ignition. The detection chamber 101 detects the ignited sample gas to generate an electrical signal, which is then input into the analysis and control unit. The analysis and control unit amplifies and converts the electrical signal to generate a chromatogram, thereby determining the composition of organic compounds in the sample gas.

[0042] The sampling unit also includes a first three-way valve 204 and a first bypass branch pipe 50. The first bypass branch pipe 50 is installed on the main pipeline 10, and the first three-way valve 204 is installed on the first pipeline 20. The first bypass branch pipe 50 is connected to the first three-way valve 204. The first three-way valve 204 has two switching states. In the first switching state, the compressed air is connected to the jet pump 208, and the air entering the compressed air inlet 202 provides power to the jet pump 208 to collect the sample gas. In the second switching state, the compressed air backflushs the sample gas inlet 201, which can effectively remove the dust from the sample gas inlet 201 and extend the service life of the equipment.

[0043] The sampling unit also includes a standard gas / zero gas inlet 203, a second three-way valve 205, and a second bypass branch pipe 60. A second three-way valve 205 is installed on the main pipeline 10 between the first bypass branch pipe 50 and the first input pipeline 01. One end of the second bypass branch pipe 60 is connected to the second three-way valve 205, and the other end of the second bypass branch pipe 60 is connected to the standard gas / zero gas inlet 203. One end of the second three-way valve 205 is connected to the sample gas inlet 201, and the other end is connected to the standard gas / zero gas inlet 203. It is mainly used for switching the intake of sample gas and standard gas / zero gas to achieve the function of equipment calibration and zeroing.

[0044] The sampling unit also includes a needle-type regulating valve 207 and a third bypass branch pipe 70. A third bypass branch pipe 70 is provided on the main pipeline 10 between the second three-way valve 205 and the first input pipeline 01. The needle-type regulating valve 207 is provided on the third bypass branch pipe 70, and the third bypass branch pipe 70 is connected to the output pipeline 03. One end of the needle-type regulating valve 207 is connected to the first input pipeline 01, and the other end is connected to the jet pump 208. It is mainly used to adjust the flow rate of the inlet of the detection chamber 101.

[0045] The sampling unit also includes a high-temperature filter 206, which is installed on the main pipeline 10 between the second three-way valve 205 and the third bypass branch pipe 70. The filter element of the high-temperature filter 206 is sintered metal powder, which is mainly used to filter impurities in the sample gas and ensure the reliability of the equipment.

[0046] The gas circuit unit also includes a first pressure regulating valve 303 and a second pressure regulating valve 304. The first pressure regulating valve 303 is installed on the second pipeline 30, and the second pressure regulating valve 304 is installed on the third pipeline 40. The first pressure regulating valve 303 and the second pressure regulating valve 304 are used to adjust the input flow rates of hydrogen and air, respectively.

[0047] The detection unit includes a flame arrester 102, a base 103, and an explosion-proof housing 104. A first input pipe 01 and a second input pipe 02 pass sequentially through the base 103 and the explosion-proof housing 104 and connect to the detection chamber 101. The flame arrester 102 is disposed in the output pipe 03. Figure 2 As shown, the detection unit consists of an output pipe 03, a flame arrestor 102, a detection chamber 101, an explosion-proof shell 104, a base 103, a first input pipe 01, and a second input pipe 02 from top to bottom.

[0048] The analysis and control unit is connected to the electrical control terminals of the detection chamber 101, the first three-way valve 204, the second three-way valve 205, the first pressure regulating valve 303, and the second pressure regulating valve 304, respectively; for example Figure 3 As shown, the analysis and control unit is mainly used to control the start and stop of the solenoid valve in the sampling unit and the pressure regulating valve in the gas circuit unit. It is responsible for powering the entire system, controlling the logic of the entire system, collecting and amplifying the electrical signals output from the detection chamber 101, and outputting current from 4 mA to 20 mA to the outside. It also interacts with the human-machine interface unit. The analysis and control unit also includes an infrared or Bluetooth module, adopts an explosion-proof design, and can also be used for external device interaction, synchronous remote data transmission, high concentration alarm, and operation status monitoring.

[0049] The sampling unit also includes an exhaust gas outlet 209, and the output end of the jet pump 208 is connected to the exhaust gas outlet 209; the function of the exhaust gas outlet 209 is to discharge the exhaust gas from the equipment.

[0050] The detection chamber 101 is equipped with an FID detector; the FID gas detector is a flame ionization detector, which detects target compounds by introducing a gas sample into a flame and then measuring the ion flow generated by the combustion of the gas sample in the flame. FID responds to most organic compounds and is not prone to false alarms.

[0051] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

[0052] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A combustible flammable organic gas analyzer characterized by, include: The detection unit includes a detection chamber (101), a first input pipe (01), a second input pipe (02), and an output pipe (03), wherein the first input pipe (01), the second input pipe (02), and the output pipe (03) are all connected to the detection chamber (101); The sampling unit includes a compressed air inlet (202), a sample gas inlet (201), a jet pump (208), a main pipeline (10), and a first pipeline (20). One end of the main pipeline (10) is connected to the sample gas inlet (201), and the other end of the main pipeline (10) is connected to the first input pipeline (01). The compressed air inlet (202) is connected to the power end of the jet pump (208) through the first pipeline (20). The suction end of the jet pump (208) is connected to the end of the output pipeline (03) away from the detection chamber (101). The gas path unit includes an air inlet (302), a hydrogen inlet (301), a second pipe (30), and a third pipe (40). One end of the second pipe (30) is connected to the hydrogen inlet (301), and the other end of the second pipe (30) is connected to the first input pipe (01). One end of the third pipe (40) is connected to the air inlet (302), and the other end of the third pipe (40) is connected to the second input pipe (02). An analysis and control unit is connected to the detection chamber (101), and the analysis and control unit generates gas analysis results based on the output electrical signal of the detection chamber (101).

2. The combustible explosive organic gas analyzer according to claim 1, characterized in that The sampling unit also includes a first three-way valve (204) and a first bypass branch pipe (50). A first bypass branch pipe (50) is provided on the main pipeline (10), and a first three-way valve (204) is provided on the first pipeline (20). The first bypass branch pipe (50) is connected to the first three-way valve (204).

3. The combustible explosive organic gas analyzer according to claim 2, characterized in that The sampling unit also includes a standard gas zero gas inlet (203), a second three-way valve (205), and a second bypass branch pipe (60). A second three-way valve (205) is provided on the main pipeline (10) between the first bypass branch (50) and the first input pipeline (01). One end of the second bypass branch (60) is connected to the second three-way valve (205), and the other end of the second bypass branch (60) is connected to the standard gas zero gas inlet (203).

4. The combustible explosive organic gas analyzer according to claim 3, characterized in that The sampling unit also includes a needle valve (207) and a third bypass branch pipe (70). A third bypass branch pipe (70) is provided on the main pipeline (10) between the second three-way valve (205) and the first input pipeline (01). The needle regulating valve (207) is provided on the third bypass branch pipe (70). The third bypass branch pipe (70) is connected to the output pipeline (03).

5. The combustible explosive organic gas analyzer according to claim 4, characterized in that The sampling unit further includes a high-temperature filter (206), which is disposed on the main pipeline (10) between the second three-way valve (205) and the third bypass branch (70).

6. The combustible explosive organic gas analyzer of claim 3, wherein The gas circuit unit further includes a first pressure regulating valve (303) and a second pressure regulating valve (304). The first pressure regulating valve (303) is provided on the second pipeline (30), and the second pressure regulating valve (304) is provided on the third pipeline (40).

7. The combustible explosive organic gas analyzer of claim 1, wherein The detection unit includes a flame arrester (102), a base (103), and an explosion-proof housing (104). The first input pipe (01) and the second input pipe (02) pass through the base (103) and the explosion-proof housing (104) in sequence and are connected to the detection chamber (101). The flame arrester (102) is disposed in the output pipe (03).

8. The combustible explosive organic gas analyzer according to claim 6, characterized by, The analysis and control unit is connected to the electrical control terminals of the detection chamber (101), the first three-way valve (204), the second three-way valve (205), the first pressure regulating valve (303), and the second pressure regulating valve (304), respectively.

9. The combustible explosive organic gas analyzer of claim 1, wherein The sampling unit also includes an exhaust gas outlet (209), and the output end of the jet pump (208) is connected to the exhaust gas outlet (209).

10. The combustible explosive organic gas analyzer of claim 1, wherein The detection chamber (101) is equipped with an FID detector.

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